Bischoffitilla cambrai Williams, 2019

Williams, Kevin A., Lelej, Arkady S., Okayasu, Juriya, Borkent, Christopher J., Malee, Rufeah, Thoawan, Kodeeyah & Thaochan, Narit, 2019, The female velvet ants (aka modkhong) of southern Thailand (Hymenoptera: Mutillidae), with a key to the genera of southeast Asia, Zootaxa 4602 (1), pp. 1-69 : 13-14

4c. Bischoffitilla cambrai Williams , sp. nov.

( Figs 42–44 )

Diagnosis. FEMALE. This species can be recognized by having the dorsoposterior propodeal row is distinct laterally but without medial teeth. Other useful features include: the genal carina is distinct and serrate or wavy; the antennal tubercle is unarmed; the clypeus is bidentate, with the basomedial surface convex; the mesopleural lamella is short and weak; mesosomal dorsum with incomplete longitudinal carina; the posterior propodeal face is reticulate; T1 apicomedially and T2 basomedially with white to golden spot; and T3–5 each have a medial spot of whitish to golden setae. Body length 4.5–11.5 mm. MALE. Unknown.

Description. FEMALE. Body length 6.9 mm. Coloration. Head black, except antennal scrobe, venter, clypeus, mandible, and antenna partly brown. Mesosoma and coxae brownish-red, other parts of legs variably darkened brown. Metasoma black, except T1, T6, and S1–6 partly reddened and cuticle whitish yellow beneath setal patches of T1–2. Lateral and ventral portions of head, mesosoma, and metasoma; legs; and T6 with setae mostly silvery. Dorsum of head and mesosoma with black and silvery sparse setae. Metasomal dorsum with black setae, except having dense pale golden narrow patch apicomedially on T1, broad entire transverse band on T2, and medial spot on T3–5. Head. Width behind eye 0.95 × mesosoma width. Frons, vertex, and gena punctures dense to confluent. Mandible apex obscure tridentate. Clypeus with apicolateral tooth distinct, medial lobe convex, densely punctate. Antennal scrobe with dorsal carina. Antennal tubercle smooth. Genal carina distinct wavy. F1 2.8 × pedicel length, F2 1.9 × pedicel length. Mesosoma. Length 1.05 × width (at lateral mesonotal teeth). Dorsum of mesosoma with confluent longitudinal punctures, many transverse interspaces obliterated, leaving apparent carinae of various lengths. Side of mesosoma with scattered micropunctures with short setae. Mesopleural lamella short, but distinct. Humeral angle sharp. Ratio of width of humeral angle, anterior spiracle, lateral mesonotal tooth, propodeal spiracle, and widest point of propodeum 44:40:49:44:49. Mesosomal dorsum with longitudinal carina interrupted by punctures. Dorsoposterior propodeal row with three teeth on left side, two teeth on right side, obliterated medially. Metatibio-tarsal ratio 110:65:37:21:17:15. Metasoma. Terga 1–5 with small dense punctures. S1 without longitudinal carina. S2 with basomedial longitudinal tubercle. T2 felt line 0.35 × T2 total length. T6 convex, lacking pygidium, with longitudinal smooth apicomedial area. S6 posterior margin rounded.

Material examined. Holotype ♀, THAILAND, Surat Thani, Khlong Sok, Our Jungle House resort, 8.908 o N 99.534 o E, 75 m, 15.V.2018, MKT (1♀ CSCA). Paratypes (14 ♀), THAILAND: Chiang Mai, Doi Suthep National Park, Monthatarn , 18.81 o N 98.94 o E, moist hardwood forest, 15.VII.1996, R.R. Snelling and S. Sonthichai (1♀ EMUS) ; Surat Thani, Khlong Sok: Khao Sok Jungle Huts , 8.909 o N 99.526 o E, 70 m: 14.V.2018, MKT (2♀ CSCA) ; 25–26.V.2018, MKT (3♀ CSCA) ; Our Jungle House resort, 8.908 o N 99.534 o E, 75 m, 25–27.V.2018, MKT (4♀ CSCA MIUP QSBG) ; Trat, Khao Saming, Chang Toon, Nong Bawn , 8–10.VII.1968 (1♀ UCRC) . VIETNAM, Lao Cai, Liem Phu , 300–650 m, 29.IX.2006, K. Eguchi (1♀ SKYC) ; Tonkin, Bae Kan, 1907, P. Lembee, ex. coll. Oberthur (1♀ RBINS) .

Distribution. Thailand (Chiang Mai, Trat, Surat Thani) and Vietnam ( Tonkin).

Etymology. KAW is proud to name this species in honor of his friend and colleague Roberto A. Cambra, who shared vital tips for collecting mutillids in tropical habitats. Some of the species described herein may have remained undiscovered without his advice.

Remarks. In Chen’s (1957) treatment, this species keys to B. sauteri lingnani and can be separated from that species by having the dorsoposterior propodeal row incomplete medially. In Mickel’s (1935) key, it terminates at couplet 11 and can be recognized by laterally distinct dorsoposterior propodeal teeth.

Figures

FIGURES 36–47. Myrmillinae: Bischoffitilla females. 36–38. B. lamellata; 39–41. B. perakensis; 42–44. B. cambrai, sp. nov.; 45–47. B. tokay, sp. nov. 36, 39, 42, 45. Habitus, dorsal view; 37, 40, 43, 46. Habitus, lateral view; 38, 41, 44, 47. Face view.