S. Mahunka szerk.: Folia Entomologica Hungarica 58. (Budapest, 1997)

gites 2 to 7, deflexed sides of tergites 2 to 7, distal l/4th of tibia and tarsus of metaleg. Wings yellowish hyaline, fore wing infuscated up to apex of stigma with a sharp limit, hind wing subinfumated towards apex, costa, stigma and venation reddish yellow. Antenna compressed, 2.7 * head width, segment 3 longer than 4 (6 : 5). Clypeus (Fig. 4) incised up to l/4th of its medial length with truncate lateral teeth. Labrum broader than long (4 : 3) with pointed anterior margin. Malar space 1.1 x diameter of median ocellus. LID : IDMO : EL = 2 : 3.5 : 3; OOL : POL : OCL = 3.5 : 1 : 3. Frontal area below level of eyes. Supra-antennal tubercles elevated and confluent with similar frontal ridges. Median fovea deep in its anterior half, with a flat bottom in posterior half. Circum-, inter- and postocellar furrows deep and clear. Lateral furrows deep and broad. Postocellar area subconvex, as long as broad. Head neither narrowing nor dilated behind eyes. ITD : ICD =4:1. Mesoscutellum roundly raised with a faint carina along its posterior slope, appendage slightly carinate. Mesepisternum obtusely raised with a blunt apex, mesosternum lacking thorns. Apical tooth of claw distinctly longer than subapical one (Fig. 9). Metabasitarsus subequal to following 3 joints combined. IATS : MB : OATS = 2:5: 1.5. Metafemur slightly longer than metatibia. Head covered with minute and irregular punctures. Mesonotum and scutellum finely and densely punctured. Appendage with a few shallow punctures. Mesepisternum almost impunctate. Propodeum sebaceous, remaining tergites microstriated. Lancet as in Fig. 14 with 29 serrulae, each serrula having 2 AST and 15-21 PST. Male - Average length 12.5 mm. Similar to female. Male genitalia: penis valve (Fig. 18), gonoforceps (Fig. 21). Holotype - Female, Arunachal Pradesh, Dirang, 1500 m, 27. V. 1993. Paratypes - 1 female, 2 males (27. V. 1993) and 2 females, 2 males (22. V. 1995) from same locality as of holotype. Population variation - None. Distribution - India: Arunachal Pradesh. Remarks - Tenthredo dirangensis sp. n. is related to 77. assamensis Konow, but can be separated as, metatibia brown in T. dirangensis sp. n. (metatibia black in T. assamensis); malar space 1.1 x diameter of median ocellus in 77. dirangensis sp. n. (malar space 0.5 x diameter of median ocellus in 77. assamensis); postocellar area as long as broad in 77. dirangensis sp. n. (broader than long as 5 : 3 in 77. assamensis). Etymology - The species is named after its type locality. Tenthredo sikkimensis sp. n. (Figs 5, 10, 15) Female - Average length 14.5 mm. Body black, light to dark brown are mandibles, abdominal tergites 2-4, anterior half of 5th with deflexed sides, tibiae of all 3 legs. Wings dusky hyaline, stigma light reddish brown, venation light to dark reddish brown. Antenna compressed, 2.4 x head width, segments 3 and 4 subequal. Clypeus (Fig. 5) rectangularly incised up to one half of its medial length with blunt lateral teeth. Labrum as long as broad with subacuminate anterior margin. Malar space 1.2 x diameter of median ocellus. LID : IDMO : EL = 2 : 3 : 2.1; OOL : POL : OCL = 3:1: 2.5. Frontal area below level of eyes. Supra-antennal tubercles elevated and confluent with low-lying frontal ridges. Median fovea shallow in anterior half, indistinct in posterior half. Circum-, inter- and postocellar furrows distinct. Lateral furrows sunken. Postocellar area