Bischoffitilla lamellata (Mickel, 1933)

Barthélémy, Christophe, Lelej, Arkady S. & Loktionov, Valery M., 2018, A contribution to the Mutillidae (Hymenoptera) of Hong Kong, Zootaxa 4514 (2), pp. 230-242 : 232-235

Bischoffitilla lamellata (Mickel, 1933)

( Figs 1 , 5–19)

Squamulotilla lamellata Mickel, 1933b: 295 , ♀, type locality "Canton, Honan Island" ( China: Guangdong); Chen 1957: 141, ♀. Bischoffitilla lamellata: Lelej 2002: 127 ; Lelej 2005: 27; Okayasu et al. 2018: 202.

Material examined. Type material. Paratypes of Squamulotilla lamellata Mickel, 1933 , CHINA: Guangdong; 2♀, Canton [Guangzhou], Honan Island, leg. W.E. Hoffmann [ SYSM]. Other material. CHINA: Hong Kong : Wetland Park , 22°28'6.75"N 114°0'19.51"E, 25. i.2018, 1 ♀, leg. V. Loktionov, P. Belianin, [ IBSS]; Pak Sha O, Malaise trap, 5–19. vi.2011, 1 ♂, UTM: 50Q KK 242 849, 70 m, ref.: M093. C.Hy. 8 [ SYSM]; Pak Sha O, Malaise trap ,, 1–27.x.2008, 14.xi–17.xii.2011, 14–27.x.2012, 27.x–10.xi.2012, 4–18. viii.2018, 6 ♂, UTM: 50Q KK 242 849, 70 m, refs.: M054. C.Hy. 3, M117. C.Hy. 2, M118. C.Hy. 2, M358. C.Hy. 2 [ CB]; Pak Sha O, Malaise trap, 29.vi– 6. vii.2008, 1 ♂, UTM: 50Q KK 242 849, 70 m, refs.: M048. C.Hy. 3 [ IBSS]; Mai Po Nature Reserve , 24.v–7.vi 2014, 1♂, UTM: 50Q JK 954 895, 1 m, ref.: MPNR-M012. G.Hy. 4 [ IBSS]; Mai Po Nature Reserve , Malaise trap, 25.x-01. xi.2016, 1 ♂, UTM: 50Q JK 948 899, 1m, ref.: WWF-M001. G.Hy. 2 [ CB] .

Diagnosis. MALE. Body length 6.0 mm. This species can be recognized by having the median carina on T2 posterad and T3-6, by S8 (hypopygium) with a conspicuous transverse arcuate carina at the proximal margin, by mandible with conspicuous subbasal tooth within. Other useful characters include: the body black with propodeum and metapleuron ferruginous-red, fore wing with two submarginal cells. FEMALE. This species can be immediately recognized by having the gena armed with a posterolateral tooth below the eye and the mesopleural lamella longer than flagellar width.

Description. MALE (hitherto unknown). Body length 6.0 mm. Head entirely black, with sparse, erect and recumbent, pale pubescence; mandibles tridentate at tip and with two small tooth within near apex and conspicuous subbasal tooth within, not at all excised beneath; clypeus transversally elevated, elevation bordered by tubercle; scape with single, obscure carina beneath; F1 0.5 × F2 when viewed from beneath; ocelli small, postocellar distance 0.6 × oculo-ocellar distance; relative widths of head and mesosoma, including tegulae, 4.0-4.4.

FIGURES 2–12. 2–4. Orientilla desponsa , ♂; 5–12. Bischoffitilla lamellata (5–7, ♀; 8–12, ♂). 2, 5, 8. Habitus, lateral view; 3, 6, 9. Habitus, dorsal view; 4, 7, 10. Head, anterior view; 11. Mandibles and clypeus; 12. Propodeum, postero-dorsal view.

Mesosoma black except ferruginous-red propodeum and metapleuron, throughout with sparse, pale pubescence; pronotum and mesonotum with moderately small, close, more or less confluent punctures; notauli absent, parapsids short; scutellum evenly convex throughout, with elongated confluent punctures; dorsum of propodeum and posterior face distinctly reticulate throughout, one rounded into other, dorsum with well-defined, median, enclosed space; propleuron micropunctate; mesopleuron with small, close, somewhat confluent punctures becoming obsolete at anterior and posterior margins, both of latter micropunctate; metapleuron micropunctate; sides of propodeum reticulate, reticulations becoming obsolete anteriorly; tegulae small, glabrous medially and posteriorly, outer, anterior and inner margins with small punctures and pale pubescence.

Legs piceous, with sparse, pale pubescence; calcaria pale, metacoxa carinated mesally.

Wings subfuscous; marginal cell broad, apex of cell obtuse and on costal margin slightly shorter than first submarginal cell, second discoidal cell receiving vein 2r-m distinctly after middle; third submarginal cell entirely absent.

Metasoma entirely black, with sparse, pale pubescence throughout; T1 with small, scattered punctures; T2 with small punctures, close laterally, distinct and separated medially, with long lateral felt line; T2 posterad and T3-6 with distinct median carina; T3-6 with small, close punctures; T7 with small, dense, confluent punctures, medially smooth; S1 flat, closely punctate, without median, longitudinal carina; S2 with two inconspicuous carinae from base medially to apicolateral corner, without any lateral felt line; S3-6 with small, close punctures posteriorly; hypopygium with prominent, subarcuate, transverse carina at anterior margin, with small, close punctures posterior to carina.

Distribution. China (Guangdong, Macao, * Hong Kong), Vietnam, Thailand ( Lelej 2005).

Remarks. In Chen’s (1957) treatment, the male of this species keys to B. tumidula ( Mickel, 1935) from Taiwan and can be separated from that species by having a ferruginous-red propodeum (black in B. tumidula ). In Mickel's (1935) treatment this species keys to B. teuta vicinaria ( Mickel, 1934) from Philippines and can be separated from that species by lacking transverse subapical ridge on S2 (with such ridge in B. teuta vicinaria ) and by having the mandible with a conspicuous subbasal tooth within (lacking in B. teuta vicinaria ).

The series of males and females of B. lamellata were collected by W.E. Hoffmann on Honan Island (near Guangzhou) (the labels without definite dates but W.E. Hoffmann collected the wasps here in 1925–1926, SYSM) and by K.A. Williams (per. comm.) in several places of Thailand and we regard them as an opposite sexes of the same species. There is no direct evidence (pair collected in copula) to support the relationship.

Figures

FIGURE 1. Distribution of 10 species of Mutillidae in Hong Kong.