Lestiphorus nemkovi Mokrousov et Proshchalykin, 2020

Mokrousov, M. V., Proshchalykin, M. Yu., & Aibek, U., 2020, Review of the Palaearctic species of Lestiphorus Lepeletier de Saint Fargeau (Hymenoptera: Crabronidae: Bembicinae), Far Eastern Entomologist 416, pp. 18-28 : 23-25

4. Lestiphorus nemkovi Mokrousov et Proshchalykin , sp. n.

http://zoobank.org/NomenclaturalActs/ B56231D7-1EFF-4882-8010-8B1993618C3D

Figs 9–15

TYPE MATERIAL. Holotype – ♀, Russia: Tyva Republic, 31 km NEE Erzin vil., Erzin

River, 50°21'N 95°33'E, 18.VII 2014, leg. A. Lelej, M. Proshchalykin, V . Loktionov [ ZISP] .

DESCRIPTION. Female. Total body length 11.2 mm; fore wing length 8.1 mm. Head completely black. Scape ventrally with yellow spot, flagellum light brown, darkened dorsally and basally; mandible in the middle and labrum brown. Mesosoma black with transverse yellow spot on posterior part of scutellum and with very reduced maculation on pronotal collar. Legs light brown or yellowish with dark coxae and trochanters; fore- and midfemora and apical hind tarsomere with darkening. Wings slightly darkened, forewing not clear spotted, veins brown, costal cell and stigma yellowish. Metasoma with ferruginous first segment (except base); rest segments black with large lateral yellow spots on T2, small lateral spots on S2 and S3 and transverse apical band on T3.

Head ( Figs 10–12 ). Head ratio H:W = 0.87; POL:OOL = 1.06; inner eye margins essentially parallel. Frons above antennal sockets without longitudinal elevation or furrow. Occipital carina well developed. Antenna elongate, length ratio – scape: F1: F2 = 1:1.22:1.04; F1 ratio

L:W = 4.7. Mandibles with internal blunt tooth in apical third. Frons shagreened, without clear punctation, vertex and temples with dense fine punctation and sparse coarser punctures;

clypeus at base with small punctation, in central part with several large punctures.

Mesosoma. Omaulus and sternaulus narrowly discontinuous. Metapostnotum well se-

parated, with shallow medial furrow and lateral folds slightly diverging to posteriorly, folds slightly not reaching the apex. Propodeal slope with median furrow. Pronotal collar with dense micropunctation and scattered small punctures; mesonotum and scutellum with dense micropunctation and scattered irregular large punctures; metapostnotum with space micropunctation and punctures; mesopleuron with not dense micropunctation and scattered irregular large punctures, ventrally shagreened and poorly visible punctures; metapleuron and labels; 10–12 – head, frontal view (10); lateral view (11); dorsal view (12); 13 –

pygidium; 14 – scutellum, metanotum and propodeum, dorsal view; 15 – T1, dorsolateral view. Scale bar: 2.0 mm.

with indistinct sculpture, with several folds dorsoposteriorly; propodeum (except metapostnotum and posterolateral small area) smooth and shiny, with sparse irregular punctation,

punctures of different size.

Wings. Venation typical for genus; hindwing media diverging slightly beyond cu-a.

Legs. Foretarsal rake well developed, basitarsus with three rake setae before apex; rake setae long, not spatulate, apical seta on basitarsus and second tarsomere in length are almost equal to two subsequent tarsomeres.

Metasoma. T1 slightly elongate (dorsal view), ratio L/ W 1.12 ×, with weak apical constriction ( Fig. 15 ). Pygidial plate ( Fig. 13 ) broad, edged only at apical half, with sparse punctures.

T1 slightly shiny with scattered punctures and poorly distinguishable mircopunctation; T2–

T5 and S2–S6 with mircopunctation (poorly distinguishable on T2 and S2) and scattered punctures.

Setation ill developed, white; stout setae on clypeus, labrum and mandibles.

Male. Unknown.

DIAGNOSIS. Differs from all known Palaearctic species of this genus by coloration and combination of the following features: metanotum and posterior part of scutellum without longitudinal rugae; propodeum (except metapostnotum and posterolateral small area) smooth and shiny, with small sparse punctures; propodeal spiracular groove lacking; T1 slightly elongate (dorsal view), with weak apical constriction.

ETYMOLOGY. Named in remembrance of the Russian expert in Spheciformes, Pavel G.

Nemkov (1962–2017).

DISTRIBUTION. The new species is known only from the type locality in Tyva Republic

( Russia).

Figures

Figs 9–15. Lestiphorus nemkovi sp. n., holotype, female. 9 – habitus, dorsolateral view