Magdalinops vittipennis Dietz, 1891

Clark, Wayne E. & Burke, Horace R., 2002, Revision Of The Weevil Genera Magdalinops Dietz And Chelonychus Dietz (Coleoptera: Curculionidae, Anthonomini), The Coleopterists Bulletin 56 (1), pp. 107-122 : 15-18

Magdalinops vittipennis Dietz

Figs. 1, 2 , 11 , 15 , 18 , 21

Magdalinops vittipennis Dietz 1891:184 .

Lectotype (here designated). United States. California. [Cal.] [Type 1945/ W. G. Dietz Coll./ Magdalinops vittipennis Dietz ] (female, MCZC). Paralectotype. [Cal.] [ Magdalinops /vittipennis/Dietz] [Type 8140/ Magdalinops /vittipennis/ W. G. Dietz] (♂, MCZC). Dietz (1891:184) stated that M. vittipennis was described from two females and one male.

Description. Body ( Figs. 1–2 ): elongate, cylindrical, parallel­sided in dorsal view; length 3.2–5.4 mm; width 1.2–2.1 mm. Integument black, narrowly exposed on dorsolateral portions of pronotum and on even­numbered elytral interstriae, otherwise concealed beneath cinereous to fulvoferruginous scales. Head: vertex, frons and venter with dense, imbricated scales; eyes small, round. Rostrum: ( Fig. 1 ). slender, slightly, evenly curved from base to apex; proximal portion rugose­punctate, with dense, cinereous scales; feebly carinate dorsomedially; lateral rostral groove broad, punctulate, with elongate cinereous scales; dorsal margin of lateral rostral groove carinate, posteroventral margin delimited by transverse carina extending from eye to lower margin of rostrum; distal portion rugulose, punctate, glabrous, expanded at apex in dorsal view. Antennae: funicular segments with broad, cinereous scales; club ovoid, compact, evenly tapered from middle to acute apex; basal segment glabrous, shining, long, ca. 0.50 X as long as club. Prothorax: pronotum densely, coarsely punctate, with narrow middorsal carina; elongate, imbricated scales predominant laterally and in broad middorsal vitta; sparser, narrower, cinereous scales predominant dorsolaterally; mesocoxae separated by distance ca. 0.1 X width of one mesocoxa. Elytra : subparallel­sided in dorsal view, flattened on disc, broadly rounded posteriorly in lateral view; striae distinctly impressed, each puncture bearing one minute scale; interstriae flattened, subequal in width; even­numbered interstriae with elongate, broadly imbricated, cinereous scales and with irregular median row of sparse, narrower, darker scales; odd­numbered interstriae with narrower, sparser cinereous scales; sutural interstriae not prominent. Scutellum : with dense cretaceous scales. Abdomen: sterna with dense, cinereous scales. Legs: profemur stout, with one small ventral tooth; metafemur with one obsolescent ventral tooth ( Fig. 11 ); protibia with well­developed inner­marginal prominence in basal 1/3, inner margin concave in apical 1/3, with distinct, acute, preapical prominence; protibial uncus large, curved, acute; metatibia with outer margin slightly curved, especially in basal 2/3, inner margin prominent in basal 1/3, broadly concave in apical 2/3, with distinct preapical convexity ( Fig. 11 ); metatibial mucro narrow, straight, oblique, acute ( Fig. 11 ); 5th tarsal segment 2.5 X longer than 3rd segment ( Fig. 18 ); tarsal claw with long, slender, acute tooth arising from inner margin slightly distad of base ( Figs. 15 , 18 ). Male Genitalia: ( Fig. 21 ). median lobe of aedeagus slightly constricted subapically, evenly, gradually narrowed to rounded apex in dorsal view; endophallus unarmed.

Specimens Examined. In addition to the lectotype and paralectotype from in California, 29 specimens of M. vittipennis from the following localities were examined. United States. California. Alpine Co.: Markleeville (1, CDAE) . Inyo Co.: Big Pine (1, CMNC) ; Independence (1, USNM) ; Lone Pine (1, CISC) ; 2 mi. NE Lone Pine (1, CISC) ; Owens Valley (1, CISC) . Kern Co.: Frazier Park (‘‘ Chrysothamnus , ’’ 2, CDAE; 4,800 –5,000 ', 1, CMNC) ; Havilah (3,000 ', 1, CISC) ; 5 mi. S Monolith (‘‘ Chrysothamnus , ’’ 2, CISC) ; Walker Pass (1, USNM) . San Bernardino Co.: Victorville (2, USNM) ; 2 mi. NW Yucca Valley (4,100 ', 1, CHAH) . San Diego Co.: (9, USNM) ; Oak Grove (2, UCDC) . Santa Barbara Co.: 8 mi. W New Cuyama (1, TAMU) . Ventura Co.: Cayama Valley (1, CDAE) .

Plant Associations. Label data indicate that adults of M. vittipennis have been collected on Chrysothamnus (Asteraceae) .

Remarks. In some specimens of M. vittipennis the scales are cinereous throughout and only slightly narrower on the odd­numbered elytral interstriae. In others, a greater or lesser proportion of the scales on the pronotum and oddnumbered interstriae are narrower and fulvescent in color, giving the elytra a more distinctly vittate appearance.

Figures

Figs. 1–4. Magdalinops spp., habitus. 1) M. vittipennis, ♀, Oak Grove, California; 2) M. vittipennis, ♀, Oak Grove, California; 3) M. knowltoni, ♂, 4 mi. W. Orangeville, Utah; 4) M. knowltoni, ♂, 4 mi. W. Orangeville, Utah.

Figs. 11–14. Magdalinops spp., metathoracic leg. 11) M. vittipennis, ♂; 12) M. knowltoni, ♂; 13) M. alutaceus, ♂; 14) M. falli, ♂.

Figs. 15–17. Magdalinops spp., tarsal claws, right prothoracic leg, ♀, dorsal view. 15) M. vittipennis; 16) M. alutaceus; 17) M. falli.

Figs. 18–20. Magdalinops spp., tarsal claws, right metathoracic leg, lateral view. 18) M. vittipennis, ♀; 19) M. alutaceus, ♀; 20) M. knowltoni, ♂.

Figs. 21–24. Magdalinops spp., aedeagus, dorsal view. 21) M. vittipennis; 22) M. knowltoni, holotype; 23) M. alutaceus, Brewster, Washington; 24) M. falli, holotype.