(Fig. 58)

Holotype ♀, Thailand, Chiang Mai Province, Doi Inthanon National Park, Summit forest, 2.iii.2007, 18° 35.361 N, 98° 29.157 E, 2500m. A. Areeluck (voucher BCLDQ00125, Genbank JQ 38835) (QSBG).

Paratypes: 3 ♂, Thailand, Chiang Mai Province, Doi Inthanon National Park, Camp ground pond, 9.ii.2007, 18° 32.40’ N, 98° 31.80’ E, 1200m, A. Areeluck (voucher BCLDQ00126, Genbank JQ388354; BCLDQ00159, Genbank JQ388344; BCLDQ00160, Genbank JF962553) (QSBG); 1 ♂, same as previous except 16.ii.2007 (voucher BCLDQ00231, Genbank JQ388465) (CUMZ); 1 ♂, same as previous except 22.iv.2007 (voucher BCLDQ00150, Genbank JQ388347) (QSBG); 1 ♂, same as previous except 2.viii.2006 (voucher BCLDQ00182, Genbank JQ388337) (QSBG); 2♀, same as previous except, 29.iv.2007, 18° 32.40’ N, 98° 31.80’ E, 1200m, Y Areeluck (vouchers BCLDQ00191, Genbank JQ388333 and BCLDQ00192, Genbank JQ388332) (BMNH & HIC); 1 ♂, Thailand, Chiang Mai Province, Queen Sirikit Botanic Garden, 20–27.iii.2009, 18° 52' 50.7" N, 98° 51' 42.3" E, 811m, semi-evergreen forest, K Kaewjanta & R. Sawkord (QSBG); 1 ♂, Thailand, Chiang Mai Province, Doi Phahompok NP, Kiewlom montane forest, 21–28.iii.2008, 20° 3.549' N, 99° 8.582' E, 2174m, P. Wongchai (collection code T6280) (no sequence data) (HIC).

Body length 5.5–8.5 mm, fore wing length 4.9–7.4 mm and antenna length 6.6–9.0 mm.

Antenna with 56 flagellomeres. Terminal flagellomere pointed. Median flagellomeres oblique, approximately 1.5 x longer laterally than wide. Occipital carina complete dorsally, narrowly obliterated near hypotomal carina ventrally. Mesopleuron largely deeply punctate to rugulose, precoxal sulcus hardly impressed or differentiated, specular area less densely punctate. Propodeum with irregular midlongitudinal carina on anterior half; with welldeveloped angular teeth posterolaterally. Fore wing vein 2-CU1 2.55 x 1-CU1. Apex of fore wing subbasal cell evenly setose. Fore wing vein 3-SR 2.5 x vein r. Fore wing vein 2-SR+M 1.65 x vein r. Fore wing vein SR1 2.8 x vein 3-SR. Hind wing vein M+CU 1.3 x 1-M. Hind wing subbasal cell with markedly reduced setosity on anterior half. Hind wing vein m-cu dark pigmented, not tubular, interstitial to postfurcal. Apex of hind tibia without a comb. Claws with pecten of 4 large, thick dark brown teeth on basal lobe of which the penultimate one is largest. Basal lobes of 1 st tergite moderately produced, sculptured. Midlongitudinal carina of 3 rd tergite variable, abselt in holtype, present on anterior 0.8 in one paratype (BCLDQ00160).

Etymology. From Thai “dam” meaning black, in reference to its largely black coloration.