Pristaulacus perfidus Turrisi and, 2020

Turrisi, Giuseppe Fabrizio & Smith, David R., 2020, Three New Species Of Aulacidae (Hymenoptera: Evanioidea) With Additional Records From Thailand And Laos, Proceedings of the Entomological Society of Washington 122 (1), pp. 197-210 : 204-206

Pristaulacus perfidus Turrisi and

Smith, sp. nov.

( Figs. 15–21 ) http://zoobank.org/ 4D245714-EA33- 4CB8-99C7-43C28218A945

Type material. — THAILAND: Holotype ♀, Thailand, Chiang Mai, Huai, Nam Dang NP, visitor center, 19.313 ° N, 98.607 ° E, pan trap, 25-26.IV.2008, Anuchart & Thawatchai , H2852, Pristaulacus perfidus Turrisi & Smith sp. nov. ♀, 2018, Holotypus ” ( QSBG) .

Etymology. — The name is derived from the Latin adjective perfidus (treacherous), based on an impression from the aspect of the wasp.

Diagnosis.—Medium-sized species, body length: 10.1 mm (excluding ovipositor); colour mostly black; A1 dark reddish ventrally legs extensively dark brown to light brown; wings hyaline; forewing with a small irregular brown spot on middle of cell B, and wide subquadrate substigmal brown spot sides of metasomal tergites and sternites dark brown. Setae: goldish on mandible, brownish on vertex and temple, whitish otherwise; head subquadrate, temple moderately developed, rounded, slightly convergent posteriorly; occipital margin almost straight, only very weakly concave medially; occipital carina narrow, about 0.3 X diameter of ocellus; mesosoma coarsely sculptured, transversecarinate to areolate-rugose; lateroventral margin of pronotum with one anterior long, acute, forwarded tooth-like process; anterior margin of mesoscutum squared, very slightly overhanging pronotum; fore wing with vein 2-rs+m short; coxa III transverse-carinate dorsally, transverse-carinulate to polished punctate ventrally; tarsal claw pectinate with four tooth-like processes; metasoma pyriform (lateral view) fairly compressed; petiole elongate, very slender, 3.9 X longer than wide; ovipositor 1.4 X fore wing length.

Description. — Female ( holotype): Length: 10.1 mm; antenna length: 5.8 mm; forewing length: 7.4 mm; ovipositor length: 10.8 mm. Colour: Black, except: mandible extensively dark reddish; A1 dark reddish ventrally trochanters, femurs, and hind tibia dark brown; fore and mid tibiae, and tarsi light brownish to brownish (except pretarsi); wings hyaline; forewing with a small irregular brown spot on middle of cell B, and wide subquadrate substigmal brown spot; metasoma with sides of tergites and sternites dark brown. Setae: goldish on mandible, brownish on vertex and temple, whitish on frons, clypeus and otherwise. Head: From above, 1.1 X wider than long, shiny; occipital margin almost straight, only very weakly concave medially; temple, from above, moderately developed, rounded, slightly convergent posteriorly, 0.6 X eye length; occipital carina narrow, about 0.3 X diameter of ocellus; POL:OOL: 1.3; ocellar area 2.2 X wider than long; vertex with fine, superficial and moderately dense punctures (distance between punctures 3.0–4.0 X puncture diameters); frons with moderately coarse, deep and dense punctures (distance between punctures 1.5–2.0 X puncture diameters); clypeus with moderately coarse, deep and dense punctures (distance between punctures 1.5–2.0 X puncture diameters); temple with fine to moderately coarse, deep and moderately dense to dense punctures (distance between punctures 1.0–4.0 X puncture diameters); malar area with coarse, deep and very dense punctures (distance between punctures 0.5–1.0 X puncture diameters); antenna 0.8 X forewing length; A3 5.0 X longer than wide; A4 9.0 X longer than wide and 1.8 X than A3; A5 8.3 X longer than wide and 1.7 X than A4. Setae: erect, short and moderately dense on vertex and upper frons; recumbent, long and dense on lower frons and clypeus; semierect, moderately long and moderately dense on temple (length of setae 0.8 X diameter of ocellus); recumbent, short and dense on malar area. Mesosoma: Coarsely sculptured; pronotum areolate-rugose with one anterior long, acute, forwarded tooth-like process on lateroventral margin; propleuron polished and shiny with fine, superficial and scattered punctures (distance between punctures 3.0–4.0 X puncture diameters); prescutum triangular, narrow, long, sharply incavate, transverse-carinate; mesoscutum transverse-carinate anterior to notauli (bearing 7 carinae), sharply distinct dorsally, anterior margin squared very slightly overhanging pronotum, otherwise areolate-rugose; notauli very wide and deep scutellum mostly transverse-carinate to longitudinal-carinate (on sides) except a narrow anterotransverse area areolate-rugose; mesopleuron areolate-rugose except anterior half of mesepimeron densely and coarsely punctate; metanotum areolaterugose; propodeum areolate-rugose; ventral parts of mesosoma mostly areolate-rugose; fore wing with vein 2-rs+m short; coxa I mostly polished punctate, except base slightly transverse-carinulate; coxa II mostly transverse-carinate, ventral parts partly polished punctate; coxa III transverse-carinate dorsally, transversecarinulate to polished punctate ventrally, punctures coarse, deep and dense (distance between punctures 1.0-2.0 X puncture diameters); inner spur of mid and hind tibiae fairly longer than outer spur; hind basitarsus 10.2 X longer than wide, and 1.0 X as tarsomeres 2-5; tarsal claw pectinate with four tooth-like processes. Setae: erect, moderately long and scattered on dorsal surface; semierect to recumbent, moderately long to long and dense on lateral and ventral parts, longer and denser on anterior margin of pronotum; erect, long and moderately dense on hind surface of propodeum; erect, moderately long and dense on propleuron (length of setae 0.6-0.7 X pretarsus length). Metasoma: Pyriform (lateral view) fairly compressed; petiole elongate, very slender, 3.9 X longer than wide; metasomal segment 1 polished impunctate; remaining segments polished punctate, punctures fine, superficial and very dense; ovipositor 1.4 X fore wing length. Setae: metasomal segment 1 and sides of sternites glabrous; otherwise recumbent, very short and dense.

Male: Unknown.

Distribution. — Thailand ( Chiang Mai Province). Known only from type locality. Biology. — Unknown.

Remarks.—This species is not obviously related to any known species. It is mainly distinguished by the combination of the colour pattern along with shape of head and length of ovipositor.

Figures

Figs. 15–21. Pristaulacus perfidus. 15, Head, front. 16, Head, lateral. 17, Head, dorsal. 18, Mesosoma, lateral. 19, Mesosoma, dorsal. 20, Wing. 21, Metasoma.