Krombeinidia baanmaka 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 : 36-37

23d. Krombeinidia baanmaka Williams , sp. nov.

( Figs 21 , 134–136 )

Diagnosis. FEMALE. The following combination of characters is diagnostic: pronotum broader than propodeum, propodeum with posterior black patch, legs largely orange, metasoma entirely black, T2 sculpture coarse, T2 disc spots moderate and separated by approximate spot diameter, pale golden T2 and T3 bands interrupted by black setae, and pygidium smooth. Body length 4.8–5.3 mm. MALE. Unknown.

Description. FEMALE. Body length 5.3 mm. Coloration. Head black, except antennal tubercle, scape, and mandible orange-brown. Mesosoma and legs orange, except femoral apices blackened. Metasoma black, except T1 basally and S1 orange-brown. Body setae generally sparse and silvery, except frons and mesosomal dorsum with interspersed erect silvery and blackish 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 subequal to distance between spots; T2 apical band and T3 band interrupted with black setae. Head. Width behind eye subequal to mesosoma width. Frons, vertex, and gena punctures narrow coarse confluent. Mandible apex apparently unidentate. Clypeus apically bidentate, lateral tooth a broad triangular lamella; basomedial portion with robust tubercle. Antennal scrobe with arcuate dorsal carina and straight lateral carina. Antennal tubercle mostly smooth. Genal carina obscure, forming small tooth at hypostomal carina and extending posteriorly to occipital carina. F1 2.2 × pedicel length, F2 1.4 × pedicel length. Mesosoma. Length 1.1 × width. Dorsum of mesosoma with coarse confluent punctures; interrupted carina separating dorsal and lateral faces of mesonotum. Side of mesosoma with dense micropunctures and short setae. Mesopleural lamella an obscure interrputed carina. Humeral carina strongest dorsally. Ratio of width of humeral angle, anterior spiracle, narrowest point of mesonotum, propodeal spiracle, and midpoint of propodeum 68:73:65:69:70. Scutellar scale rounded posteriorly, ~1.5 punctures wide, surrounded by scattered tubercles. Posterior propodeal face reticulate with many interspaces obliterated forming tubercles. Lateral and posterior propodeal faces separated by row of teeth. Metatibio-tarsal ratio 55:24:15:13:6:6. Metasoma. T1 anterior face with dense punctures, posterior with confluent punctures. T2 disc with coarse 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 coarse punctures, interspaces smooth. T2 felt line 0.3 × T2 total length. T6 with long sub-ovate pygidium, widest sub-apically with lateral carina obliterated in posterior third; smooth throughout. S6 posterior margin truncate.

Material examined. Holotype ♀, Phetchaburi, Kaeng Krachan, Baan Maka Nature Lodge , 12.840 o N 99.590 o E, 140 m: 22–23.V.2018, MKT (CSCA). Paratype (1 female), same data as Holotype (1♀ CSCA) .

Distribution. Thailand (Phetchaburi).

Etymology. This species is named for the type locality, Baan Maka Nature Lodge. Many thanks to Ian Dugdale and Pujapa Phretsi for their hospitality and for maintaining this great natural habitat. Treat as a noun in apposition.

Remarks. In sculpture and overall body shape this species is similar to K. meeungensis . In Chen’s (1957) key, this species terminates at couplet 8 of the Smicromyrme key, because the apical T2 band is interrupted and the S1 carina is medially notched once. In Mickel’s (1935) key, it keys to Petersenidia psecas ( Mickel, 1935) , which is known only from Borneo and lacks the apical setal band of T2.

Figures

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

FIGURES 125–136. Mutillinae: Trogaspidiini females II. 125–127. Krombeinidia meeungensis; 128–130. K. agricola, sp. nov.; 131–133. K. chang, sp. nov.; 134–136. K. baanmaka, sp. nov. 125, 128, 131, 134. Habitus, dorsal view; 126, 129, 132, 135. Habitus, lateral view; 127, 130, 133, 136. Face view.