Empis (Enoplempis) floricola, Sinclair & Brooks & Cumming, 2025

Sinclair, Bradley J., Brooks, Scott E. & Cumming, Jeffrey M., 2025, Revision of the western Nearctic species of Empis subgenus Enoplempis (Diptera: Empididae), Zootaxa 5615 (1), pp. 1-200 : 76-80

Empis (Enoplempis) floricola sp. nov.

urn:lsid:zoobank.org:act:28277008-8E5D-48A7-981D-27B9C17D5702

( Figs 154–156 , 160, 161 , 174 )

Type material. HOLOTYPE ♂, labelled: “CAN: BC: Glacier NP/ Illecillewaet tr from Cpgd./ 20.vii.2012, 1320 m / N 51°10.018′W 117°29.799′/ B.J. Sinclair ”; “ex. flowers of Mtn vallaria/ (Vallariana sitchensis)”; “ CNC /

1078375”; “ HOLOTYPE / Empis (Enoplempis) / floricola Sinclair ,/ Brooks & Cumming [red label]” ( CNC). PARATYPES: CANADA. British Columbia: Same data as holotype (4♂, 2♀, CNC); Bowser [49°26′N 124°40′W], 30.v.1955, J. R. McGillis (1♂, CNC); same data except, 31.v.1955, R. Coyles (1♂, CNC); Copper Slough, 10 mi. E Terrace [54°30′N 128°35′W], 16.vii.1960, CHM (1♀, CNC); Glacier Ck, 10 mi. N Terrace [54°39′N 128°40′W], 7.vii.1960, JGC (1♂, 4♀, CNC); Glacier NP, Bostock Tr., 51.2303°N 117.6695°W, 993 m, 14.vii.2010, BIObus 2010, Subset of LOT# L#PC2010GR-081 (1♂, 2♀, CNC); Glacier NP, Illecillewaet trails, + 1325 m, 51°10.018′ N 117°29.799′W, 20.vii.2012, swept trails from cpgd, BJS (2♂, CNC); Kitsumkalum Lk., 20 mi. N Terrace [54°43′N 128°46′W], 16.vi.1960, JGC (1♀, CNC); same data except, 500 ft, W.W. Moss (1♂, CNC); same data except, R. Pilfrey (1♀, CNC); Kleanza Ck, 14 mi. E Terrace [54°35′N 128°24′W], 17.vi.1960, CHM (12♂, 39♀, CNC); same data except, 29.vi.1960 (1♂, 6♀, CNC); same data except, 30.vi.1960 (1♂, 2♀, CNC); same data except, 4.vii.1960 (1♂, 3♀, CNC); same data except, 13.vii.1960 (1♀, CNC); same data except, 12.vii.1960, G.P. Holland (7♂, CNC); same data except, 19.vii.1960, W. R. Richards (1♀, CNC); same data except, 250 ft, 17.vi.1960, R. Pilfrey (1♂, CNC); same data except, 29.vi.1960, B. Heming (1♂, CNC); Kleanza Ck, 14 mi. E Terrace, 17.vi.1960, wet scrub in cutover forest, JGC (1♀, CNC); same data except, swept from old lumber pile (1♀, CNC); same data except, 29.vi.1960, on liliaceous undergrowth hemlock forest (1♂, 4♀, CNC); same data except, 4.vii.1960, wet scrubby clearing (5♀, CNC); same data except, 13.vii.1960, along trail in second growth woods (2♀, CNC); same data except, lumber scrap (1♀, CNC); 5 mi. S Lakelse, Hot Springs, [54°21′N 128°32′W], 8.vii.1960, CHM (1♀, CNC); Manning PP, Lightning Lk., 49°03.52′N 120°50.48′W, 1265 m, 22.vii.2015, forest, BJS (1♂, 1♀, CNC); Manning PP, Skyline Tr., 49°03.63′N 120°53.96′W, 1460 m, 22.vii.2015, BJS (1♂, CNC); Mt Allard, 23 mi. N Terrace [49°33′N 121°26′W], 20.vii.1960, alpine meadow Arnica , Achillea , 4000–5000 ft, CHM (1♀, CNC); Mt Thornhill nr Terrace [54°29′N 128°27′W], 26.vii.1960, B. Heming (2♂, 1♀, CNC); same data except, 30.vii.1960, W. R. Richards (2♀, CNC); same data except, 29.vii. 1960, 700 ft (1♂, 1♀, CNC); same data except, 3000–4000 ft (1♀, CNC); same data except, 26.vii.1960, 2000 ft, wet hollow along trail, B. Heming (6♂, 6♀, CNC); same data except, 8.viii.1960, along trail in hemlock forest, 2500 ft (2♀, CNC); same data except, in boggy seepage area, 3500 ft (1♀, CNC); same data except, 26.vii.1960, along trail in hemlock forest, 2500 ft, CHM (3♂, 2♀, CNC); same data except, second growth hemlock forest, 1500–2000 ft (1♂, 3♀, CNC); same data except, 3000–4000 ft (1♀, CNC); same data except, 14.vii.1960, 1500 ft (2♀, CNC); same data except, 8.viii.1960 (1♀, CNC); same data except, 14.vii.1960, 2000 ft, JGC (3♂, 3♀, CNC); same data except, wet hollow along trail, 2500 ft, (1♂, 1♀, CNC); same data except, wet hollow along trail, 3000 ft (1♀, CNC); same data except, 14.vii.1960, second growth hemlock forest, 1500–2000 ft (4♂, 1♀, CNC); Shames, 18 mi. SW Terrace [54°29′N 128°57′W], 17.vii.1960, CHM (1♀, CNC); Squamish, Diamond Head Tr. [49°45′N 123°02′W], 3700 ft, 17.viii.1953, W. R.M. Mason (1♂, CNC); same data except, 3600 ft, 12.viii.1953 (1♀, CNC); same data except, 3300 ft, 18.viii.1953, G.J. Spencer (1♀, CNC); Terrace [54°30′N 128°35′W], 12.viii.1960, W. R. Richards (1♀, CNC); same data except, 220 ft, 19.vii.1960, B. Heming (1♂, 1♀, CNC); 54 mi. NE Terrace nr Woodcock [55°03′N 128°13′W], 25.vii.1960 (1♀, CNC); Zymagotitz R, 6 mi. W Terrace [54°28′N 128°44′W], 190 ft, 20.vi.1960, W.W. Moss (1♀, CNC). USA. Alaska: Haines Borough : Mosquito Lk., 59 27N 136 02W, 6.vii.1983, G.G.E. Scudder (1♂, UBCZ). Idaho: Benewah County: St Joe NF, Wilson Ck [47°07′N 116°24′W], Vista Point, 21.vi.1970, W.B. Garnett (1♂, WSU). Latah County: 5 mi. NE Harvard, Palouse R / Strychnine Ck [46°56′N 116°38′W], 19.vi.1972, B.J. Hanson (1♂, WSU); 7 mi. SE Harvard, L. Sand Ck [46°54′N 116°37′W], 2500–3000 ft, 22.vi.1973, WJT (1♂, 1♀, WFBM); Big Meadow Ck Rec. Area, 5 mi. NW Troy [46°44′N 116°46′W], 14.vii.1979, R.S. Zack (1♀, WSU); Big Meadow Rec. Area, 7 mi. NNE Troy, 3000 ft, 19.vi.1986, sweeping, WJT (1♂, 1♀, WSU); 7 mi. NNE Moscow [46.73°N 117.00°W], 2700 ft, 29.vi.1975, WJT (1♂, 2♀, WSU); Moscow Mtn, Tamarack Rd, 16.vi.2014, 1130 m, 46°48.162′N 116°49.552′W, streamlets, BJS (2♂, 2♀, CNC); same data except, Moscow Mtn Rd, 22.vi.2014, 1000 m, 46°47.721′N 116°54.093′W, cascading str. (1♂, 2♀, CNC); Moscow Mtn [46°48ʹN 116°52ʹW], 1.v.1907 (1♂, 1♀, USNM); same data except, 12.vi.1910 (1♀, USNM); same data except, 2.vii.1911 (1♂, 1♀, USNM); same data except, 9.vii.1911 (1♀, USNM); same data except, 6.vii.1912 (2♂, 3♀, USNM); same data except, 19.vi.1972, Dry Ice MT, WJT (1♂, 4♀, WSU); Troy, Hwy 8 + mm 15, West Fk Ck, 747 m, 46.733°N 116.757°W, 9.vi.2009, E09-62c, I.S. Winkler (1♂, CNC). Shoshone County: Hobo Cedar Grove 12 mi, NNE Clarkia [47.0911°N 116.127°W], 20.vi.1987, 4400 ft, WJT, sweep (4♂, WSU). Oregon: Baker County: L. Goose Ck, 36 mi. SE Union [44°56′N 117°25′W], 4000 ft, 29.vi–5.vii.1975, E.J. Davis, MT baited with CO 2 (3♂, 6♀, WSU); same data except, 9–12.vi.1977 (1♀, WSU); U. Goose Ck, 34 mi. SE Union [44°56′N 117°25′W], 4160 ft, 13–19.vii.1975, E.J. Davis, MT baited with CO 2 (1♂, 2♀, WSU); Velvet Ck [45°1′N 117°31′W], 28 mi. SE Union, 4720 ft, Wallowa-Whitman NF, 17.vi.1977, swarm, WJT (2♂, WFBM); same data except, 18–20.vii.1976, E.J. Davis, MT baited with CO 2 (1♂, 1♀, WSU). Clackamas County: Mirror Lake, outlet ck, 45°18′15″N 121°47′30″W, 1.viii.2016, SJF (3♂, 1♀, CNC); Mt Hood NF, Still Ck Rd, 45°17.879′N 121°53.276′W, 8.vii. 2013, 570 m, BJS (1♂, 8♀, CNC); Mt Hood NF, Still Ck Cpgd, 45°17.703′N 121°44.313′W, 9.vii.2013, 1150 m, BJS (2♂, 4♀, CNC); same data except, 27.vi.1978, DDW (3♂, CAS); Mt Hood NF, Still Ck jct. Timberline Hwy, 45°18′21″N 121°43′59″W, 1.vii.2016, SJF (5♂, 2♀, CNC). Lane County: Salt Ck Falls Cpgd, 33 km SE Oakridge [43°36′N 122°07′W], 26.vii.1974, 1219 m, PHA (1♂, CAS); 40 mi. NNE Oakridge, Skookum Ck [43°51′N 122°01′W], 4450–4500 ft, 1.vii.1978, L. & N. Herman (2♂, AMNH); Willamette NF, Proxy Falls [44°09′N 121°55′W], 22.vi.1978, DDW (1♂, CAS). Linn County: 0.5 mi. E Tombstone Pass, Hackleman Ck, 44°23′51″N 122°07′53″W, 29.vi.2016, SJF (1♂, CNC); same data except, 0.6 mi. E Tombstone Pass, 29.vi–1.viii.2016, MT (1♂, 1♀, CNC); Willamette NF, Hackleman Ck Rd No. 2672, 44°24.733′N 122°02.555′W, 11.vii.2013, BJS (3♂, 5♀, CNC); Monument Peak Guard Sta. s.21, TIOS, R 4E [44°43′N 122°22′W], 4000 ft, 17.vii.1969, E.M. Fisher (1♂, CSCA); N. Santiam R at Hwy 22 & Parrish Lk. Rd, 44°31′26.7″N 121°59′49.3″W, 948 m, 10.vii.2014, swp along river & in forest, SEB (1♂, CNC); Willamette NF, 1175 m, Fork of No. 410 & 420, 44°23.413′N 122°02.808′W, 11.vii.2013, small stream, BJS (1♀, CNC). Union County: L. Lick Ck, 26 mi. SE Union [45°12′N 117°52′W], 4280 ft, 23–26.vi.1976, MT baited with CO 2, E.J. Davis (1♂, 2♀, WSU); same data except, 15–21.vi.1975 (1♀, WSU); Whiskey Ck, 23 mi. SSW La Grande [45°16′N 118°13′W], 5120 ft, 22–28.vi.1975, MT baited with CO 2, E.J. Davis (1♀, WSU). Wallowa County: Joseph [45°21′09″N 117°13′49″W], 6.vii.1949, J.L. & G.H. Sperry (2♂, USNM). Washington: Asotin County: Anatone [46.135°N 117.132°W], 19.vi.1948, R. R. Sanders, sweep (1♀, WSU); Fields Spring SP [46°4′N 117°10′W], 4 mi. S Anatone, 3500–4000 ft, 7.vi.1973, WJT (2♀, WSU); same data except, 26.vi.1979 (1♀, WSU); same data except, 12–13.vi.1974, MT with dry ice (2♂, 5♀, WSU); Fields Spring SP, 19.vii.1948, M. T. James (2♂, 1♀, WSU); same data except, 15.vi.1972, dry ice MT (1♂, WSU); Fields Spring SP, 6.65 km SSW Anatone, Tr. To Puffer Butte, open Pinus ponderosa forest, 46°04′43″N 117°10′19″W, 1260 m, sweep, 16.vi.2005, C.J. Borkent (1♂, LEM). Clallam County: Olympic NP, Heart of the Hills [48°05′N 123°25′W], 15.vii.1977, R.S. & V.L. Zack (5♂, 2♀, WSU). Chelan County: Scotty Ck, 2520 ft, 47°24′5″N 120°39′20″W, 13.vi.2018, SEB (2♂, 3♀, CNC). King County: 8 mi. W Snoqualmie Pass [47°23′N 121°28′W], 29.vi.1924, ALM (2♂, 2♀, USNM). Kittitas County: Lk. Keechelus [47.35°N 121.37°W], 29.vi.1924, ALM (2♂, USNM). Lewis County: trib. of Catt Ck, 2847 ft, 46°41′53″N 121°57′46″W, 16.vi.2018, SEB (1♂, 3♀, CNC); Mt Rainier, Eagle Peak [46°45′N 121°46′W], 19.vii.1922, ALM (14♂, 7♀, USNM); Mt Rainier NP, Narada Falls to Reflection Lk. Tr., 46°46′N 121°44′W, 1400 m, 17.vii.2012, BJS (1♂, CNC); Mt Rainier NP, Stevens Ck Tr., 4.vii. 2013, 860 m, 46°45.338′N 121°38.530′, BJS (3♂, 2♀, CNC); Wonderland Tr. (Narada Falls to Cougar Rock), 46°46′22″N 121°44′52″W, 29.vii.2016, crk, R.J. Pivar (1♀, CNC). Mason County: 16 km NW Lilliwaup, Staircase, Olympic NP, W side of N fork Skokomish R, 47°31′06″N 123°19′58″W, 280 m, 10.vi.2004, C.J. Borkent, CJB04-5 (1♂, LEM). Pierce County: Mt Rainier NP, Comet Falls Tr., above via Trump Ck [46°46′N 121°47′W], 4500 ft, 13.viii.1977, sweeping, WJT (1♂, WSU); Mt Rainier NP, Comet Falls Tr., 46°46.724′N 121°47.029′W, 16.vii.2012, 1100 m, BJS (4♂, 2♀, CNC); Mt Rainier NP, Cougar Rock to Longmire Tr., 46°45.6′N 121°48.2′W, 17.vii. 2012, 920 m, BJS (8♂, 11♀, CNC); Mt Rainier NP, Fairfax Tr. [47°00′N 122°01′W], 9.viii.1922, ALM (1♂, USNM); Mt Rainier NP, Longmire [46°45′N 121°48′W], 18.vii.1922, ALM (19♂, 3♀, USNM); same data except, 26.viii.1921 (1♂, USNM); Mt Rainier NP, Longmire, Trail of the shadows (cedar-hemlock forest) and Marsh ( Carex , Lysichitum ) W of Inn, sweep, 46°44′56″N 121°48′51″W, 850 m, 25.vi.2005, C.J. Borkent, CJB05-27 (3♂, 3♀, LEM); Mt Rainier NP, Ramparts [46°45′N 121°49′W], 1.viii.1922, ALM (1♀, USNM); Mt Rainier NP, West Side Rd nr Fish Ck, 46°46.743′N 121°53.069′W, 4.vii. 2013, 880 m, BJS (13♂, 7♀, CNC); same data except, 910 m, 1.viii.1977, DDW (1♂, CAS); Mt Rainier NP, West End Rd nr Puyallup R [46°50′N 121°55′W], 3500 ft, 12.viii.1977, WJT (1♂, WSU); Mt Rainier NP, White R Cpgd on White R [46°54′N 121°38′W], 4400 ft, 9–10.viii.1977, sweep, WJT (2♀, WSU). Skamania County: Mt St Helens [46°16′N 122°13′W], 22.vii.1978, T.L. Whitworth (2♂, LACM). Stevens County: 5 mi. NE Deer Lk. [48°10′N 117°35′W], 3200 ft, 11–13.vii.1975, WJT (1♂, 1♀, WSU). Whatcom County: Bellingham [48°45′N 122°29′W], 15.v.1910 (1♂, 1♀, USNM).

Diagnosis. This species is distinguished from other species of the E. (En.) delumbis species group by the male hind tibia and swollen hind tarsomere 1 with very long dorsal setae ( Fig. 154 ), setae on male terminalia long and slender, phallus with spiculate apex and subapical expansion and pair of narrow lateral lobes.

Description. Wing length 5.5–6.5 mm. Male. Similar to E. (En.) delumbis except as follows: head holoptic. Antenna with postpedicel long, slender, 6× longer than basal width. Palpus brown, with dark setulae and 1 long apical seta.

Thorax greyish brown in ground-colour. Scutum with narrow, faint brownish vittae along inner margin of dc; postpronotal lobe, postalar ridge and scutellum yellowish. Pleura with pale margins of katepisternum and anepimeron.

Legs slender, yellow, with apical portion of femora and tibia brownish, tarsomeres darker; coxae pale, in contrast to greyish pleura ( Fig. 154 ). Fore tibia with 3 erect anterodorsal setae, longer than width of tibia; with circlet of preapical setae; anterior face with short appressed setae. Fore tarsomere 1 inflated, slightly narrower than width of tibia, with 2 long dorsal setae, longer than width of tarsomere, with fine ventral setae and biserial row of stronger setae, longer than width of tarsomere; tarsomeres 2–5 with biserial row of spine-like ventral setae; tarsomeres 1–4 with apicolateral pair of spine-like setae, longer than width of segment. Mid femur with erect, pale ventral setulae, length one-third width of femur, with strong preapical anterior seta. Mid tibia with 1–2 erect anterodorsal and posterodorsal setae; ventral and posterior faces with dense fine setulae; circlet of strong preapical setae. Mid tarsus slender; tarsomeres 1–5 with biserial row of spine-like ventral setae; tarsomeres 1–4 with apicolateral pair of spine-like setae, longer than width of segment. Hind femur with erect, pale ventral setulae, length one-third width of femur; 3 closely approximated preapical ventral protuberances, with dark, curved, flattened apices; apex with preapical row of 7–8 flattened, black posterior setae; preapical anterior seta strong, longer than width of femur; 1–2 preapical anterodorsal setae ( Figs 154–156 ). Hind tibia with narrow base, without subbasal swelling and bend; basiventral swelling with posteroventral lobe with appressed apical setae; face of swelling with small circular ridge of depressed inner surface; long, numerous dorsal setae, length more than 3 times width of tibia; long setae on ventral surface ( Figs 154–156 ). Hind tarsomere 1 inflated, with long dorsal setae similar to tibia, ventral stout setae longer than width of tarsomere; remaining tarsomeres similar to fore tarsus ( Fig. 154 ).

Abdomen paler than thorax, subglossy. Pregenital segments modified: tergite 6 with posterior margin broadly U-shaped; posterolateral corner prolonged with long, dark marginal setae. Tergite 7 with rectangular invagination along posterior margin; posterolateral margin with strong, long dark setae; dorsolaterally with knob-like swelling. Tergite 8 divided into two sclerites: rectangular posterior sclerite, broadly separated from anterior sclerite fused laterally to sternite 8; posterior margin of sternite 8 and posterior sclerite of tergite 8 with long, dark marginal setae. Terminalia ( Figs 160, 161 ): brown with long dense setae. Cercus short, L-shaped, projecting obliquely from epandrium; apical half rectangular with narrow apical projection; setae longer than width of cercus. Subepandrial process extending to either side of phallus. Epandrial lamella subrectangular, tapered, posterior margin rounded with short, upturned projection; setae longer than width of epandrium. Hypandrium long, tapered, apical margin truncate; setae shorter than length of hypandrium. Phallus ( Fig. 161 ) with basal half gradually tapered; paired, slender lateral processes beyond mid-length; spiculate surface on subapical swelling and broad apex; ejaculatory apodeme half-length of epandrium, Y-shaped, with ventrally positioned lateral apodemes.

Female. Similar to male, except as follows: frons broader, slightly wider than anterior ocellus; hindleg without modified setae and processes; hind tibia with long anterodorsal and posterodorsal setae, twice width of tibia; ventral surfaces of mid and hind femora as in male; abdominal pleural membrane without darkened, expanded region; tergites 7 and 8 with pruinescence.

Geographical distribution and seasonal occurrence ( Fig. 174 ). Empis (En.) floricola sp. nov. is known from the pan handle of Alaska south through British Columbia, Washington, Oregon and Idaho. Adults have been collected from May to August.

Etymology. The species name is Latin for flower (flora) and dweller (cola) in reference to the flower visiting habits of this and many other species of Empis .

Nuptial gift presentation. Form unknown.

Figures

FIGURES 154–159. Male habitus and hindleg of the E. (Enoplempis) delumbis species group. 154, E. (En.) floricola sp. nov., habitus, lateral view; 155, same, hind femur tibia joint, anterior view; 156, same, hind femur tibia joint, posterior view; 157, E. (En.) sphaera sp. nov., habitus, lateral view; 158, same, hind femur tibia joint, anterior view; 159, same, hind femur tibia joint, posterior view.

FIGURES 160–163. Male terminalia of the E. (Enoplempis) delumbis species group, lateral view. 160, E. (En.) floricola sp. nov.; 161, same, phallus; 162, E. (En.) sphaera sp. nov.; 163, same, phallus.

FIGURES 174–175. Known geographical distribution of the E. (Enoplempis) delumbis species group. 174, E. (En.) floricola sp. nov.; 175, E. (En.) sphaera sp. nov. and E. (En.) tripenicillata sp. nov.