Orientidia manleyi 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 : 37-38

25a. Orientidia manleyi Williams , sp. nov.

( Figs 22 , 137–138 )

Diagnosis. FEMALE. The following combination of characters is diagnostic: pronotum broader than propodeum; mesosoma uniform orange; scutellar scale rounded posteriorly, ~2 punctures wide; legs partly orange; metasoma entirely black; T2 sculpture coarse; T2 disc spots moderate and separated by approximate spot diameter; T2 and T3 bands interrupted medially by black setae; and T6 without pygidium. Body length 3.5–6.5 mm. MALE. Unknown.

Description. FEMALE. Body length 4.4 mm. Coloration. Head black, except frons ventrally, antennal tubercle, mandible, clypeus, scape, and pedicel orange-brown. Mesosoma and legs orange-brown, femoral and tibial apices darkened. Metasoma black, except S1 orange, and T1 and S2 partly red-brown. Body setae generally sparse and silvery, except frons and mesosomal dorsum with sub-erect mostly red-brown setae; T2 disc, T4, and T5 setae dense black; and vertex, T2 disc lateral spots, T2 apical band, T3 entirely, and T6 basal tuft with dense pale golden setae; T2 lateral spot diameter 1.1 × distance between spots; T2 apical band and T3 band narrowly interrupted medially with black setae. Head. Width behind eye subequal to mesosoma width. Frons, vertex, and gena punctures confluent. Mandible apex narrow bidentate. Clypeus apically bidentate, teeth connected by weak transverse lamella; basomedial portion with weak flat tubercle. Antennal scrobe with arcuate dorsal carina nearly continuous to mandible base. Antennal tubercle with weak punctures and sparse setae. Genal carina obscure, forming small tooth at hypostomal carina and extending posteriorly to occipital carina. F1 2.0 × pedicel length, F2 1.4 × pedicel length. Mesosoma. Length subequal to width. Dorsum of mesosoma with coarse confluent punctures; wavy carina separating dorsal and lateral faces of pronotum and mesonotum. Side of mesosoma with dense micropunctures and short setae. Mesopleural lamella an obscure interrupted carina. Humeral carina weak, complete. Ratio of width of humeral angle, anterior spiracle, narrowest point of mesonotum, propodeal spiracle, and midpoint of propodeum 48:55:44:48:51. Scutellar scale sub-truncate posteriorly, ~2 punctures wide, surrounded by scattered tubercles. Posterior propodeal face reticulate with many interspaces obliterated leaving tubercles. Lateral and posterior propodeal faces separated by row of teeth. Metatibio-tarsal ratio 42:18:13:9:8:8. Metasoma. T1 anterior face with dense punctures, posterior with confluent punctures. T2 disc with separated ovate pits, interspaces densely micropunctate and setose; with obscure transverse arcuate depression in apical half. T3–5 and S3–5 with small dense punctures. S1 with longitudinal lamella, shallow emarginate medially. S2 with sparse punctures, interspaces smooth. T2 felt line 0.3 × T2 total length. T6 convex without any trace of pygidium. S6 posterior margin rounded.

Material examined. Holotype ♀, THAILAND, Nakhon Si Thammarat, 4.4 km N Hin Tok, Mountainside rubber farm, 8.303 o N 99.849 o E, 8.IV.2017, MKT (CSCA). Paratypes (27 ♀). THAILAND : Chiang Mai, Doi Inthanon National Park , 18.44 o N 98.60 o E, 600 m, 11.VII.1996, R.R. Snelling and S. Sonthichai (1♀ EMUS) ; Krabi, 14 km NNE Krabi, Phnom Bencha Mountain Resort, 8.208 o N 98.937 o E, 80 m, 2.IV.2017, MKT (1♀ CSCA) ; Nakhon Si Thammarat, 4.4 km N Hin Tok, Mountainside rubber farm, 8.303 o N 99.849 o E, 7–8.IV.2017, MKT (21♀ CSCA EMUS MIUP PSUC QSBG) ; Surat Thani, Khlong Sok, Khao Sok Jungle Huts , 8.909 o N 99.526 o E, 70 m: 14.V.2018, MKT (1♀ CSCA) ; 25–26.V.2018, MKT (3♀ CSCA) .

Distribution. Thailand (Chiang Mai, Krabi, Nakhon Si Thammarat, Surat Thani).

Etymology. We are proud to name this species after Donald G. Manley for his many contributions to velvet ant taxonomy and systematics.

Remarks. In Chen’s (1957) key, this species terminates at couplet 3 of the Smicromyrme key, because the clypeus is entire and the T2 disc spots are well-defined and subcircular. In Mickel’s (1935) key, it keys to Petersenidia psecas ( Mickel, 1935) , which is known only from Borneo, has a defined pygidium, and lacks an apical T2 band.

Figures

FIGURES 1–28. Mutillidae, dorsal habitus of females. Scale bars represent actual specimen length.

FIGURES 137–146. Mutillinae: Trogaspidiini females III. 137–138. Orientidia manleyi, sp. nov.; 139–140. O. thoawanae, sp. nov.; 141–142. Petersenidia modkhong, sp. nov.; 143–144. Petersenidia leleji, sp. nov.; 145–146. Promecidia ninnii. 137, 139, 141, 143, 145. Habitus, dorsal view; 138, 140, 142, 144, 146. Habitus, lateral view.