Krombeinidia meeungensis ( Cockerell, 1928 ) Williams & Lelej & Okayasu & Borkent & Malee & Thoawan & Thaochan, 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 : 33-34

23a. Krombeinidia meeungensis ( Cockerell, 1928) , comb. nov.

( Figs 125–127 )

Mutilla meeungensis Cockerell 1928: 599 , ♀.

Petersenidia meeungensis: Lelej 2005: 71 , ♀.

Diagnosis. FEMALE. The following combination of characters is diagnostic: pronotum broader than propodeum, mesosoma uniformly orange, legs partly orange, metasoma entirely black, T2 sculpture coarse, T2 disc spots moderately large and separated by less than spot diameter; pale golden T2 and T3 bands interrupted or subinterrupted by black or brown setae, and pygidium smooth. Body length 5.4–6.2 mm. MALE. Unknown.

Extended diagnosis. FEMALE. Body length 5.4 mm. Coloration. Head black, except antennal tubercle, mandible, and scape partly red-brown. Mesosoma, coxae, and femoral bases orange-brown, femoral apices, tibiae, and tarsi blackish. Metasoma black, except T1, S1, and T6 dark red-brown, T2 and T3 apex obscure yellow-brown beneath white setal bands. Body setae generally sparse and silvery, except frons and mesosomal dorsum with erect mostly 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 1.2 × distance between spots; T2 apical band interrupted medially with black setae and T3 band sub-interrupted with sparse brown setae. Head. Width behind eye 1.1 × mesosoma width. Frons, vertex, and gena punctures coarse confluent. Mandible apex narrow apparently unidentate. Clypeus apically bidentate; basomedial portion with sharp narrow tubercle. Antennal scrobe with arcuate dorsal carina and straight lateral carina. Antennal tubercle with fine punctures and transverse ridges. Genal carina distinct, forming small tooth at hypostomal carina and merging posteriorly with occipital carina. F1 2.1 × pedicel length, F2 1.6 × pedicel length. Mesosoma. Length 1.1 × width. Dorsum of mesosoma with coarse confluent punctures; lateral tooth separating dorsal and lateral pronotal faces, weak carina separating dorsal and lateral faces of mesonotum. Side of mesosoma with dense micropunctures and short setae. Mesopleural lamella an obscure interrupted carina. Humeral carina simple, sharp dorsally. Ratio of width of humeral angle, anterior spiracle, narrowest point of mesonotum, propodeal spiracle, and midpoint of propodeum 45:49:39:42:43. Scutellar scale sub-truncate posteriorly, ~3 punctures wide, surrounded by scattered tubercles. Posterior propodeal face reticulate with some interspaces reduced, forming apparent striae and tubercles. Lateral and posterior propodeal faces separated by row of weak teeth. Metatibio-tarsal ratio 60:25:18:13:10:10. Metasoma. T1 anterior face with separated 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, highest posteriorly. S2 with dense coarse punctures, interspaces smooth. T2 felt line 0.2 × T2 total length. T6 with long sub-ovate pygidium, widest subapically with lateral carina obliterated in posterior third; smooth throughout. S6 posterior margin bidentate.

Material examined (6 ♀). THAILAND: Chiang Mai, Omkoi District, Dry dipterocarp forest, 17°50′49.9″N 98°22′33.0″, 950–1010 m alt., 21.VI.2017, R. Mizuno (1♀ EUM); Kanchanaburi: Khuean Srinagarindra National Park, 14 o 29.97'N 98 o 53.05'E, Malaise trap, 9–16.IV.2009, Boonam and Phumarin, T4793 (1♀ QSBG) ; Thong Pha Phum , Vimarndin farm stay, 14.655 o N 98.521 o E, 200 m, 17–20.V.2018, MKT (2♀ CSCA) ; Nakon Ratchasima, Sakaerat lowland, forest, 9–10.VII.1999, Sk. Yamane (2♀ SKYC); Phatthalung, 2.4 km S Ban Na, Farm , 7.543 o N 99.883 o E, 50 m, 10.IV.2017, MKT (1♀ CSCA).

Distribution. Thailand (Chiang Mai, Nan, Kanchanaburi, Nakon Ratchasima, Phatthalung).

Remarks. In sculpture and overall body shape this species is similar to K. baanmaka . This species, described by Cockerell (1928), has not been included in any keys. 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. The identification of K. meeungensis was possible after examination of three females from South China (Yunnan); two of them were identified by late B. Petersen who studied the type of Cockerell.

Figures

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.