Enicospilus tripartitus Chiu, 1954 Figs 2C, 26

Enicospilus tripartitus Chiu 1954: 36; holotype ♀, Taiwan, TARI, examined.

Material examined.

27♀♀ 10♂♂ and 2 unsexed: Nepal (24♀♀ 8♂♂ and 1unsexed), China (1♀), India (1♂), Japan (1 unsexed), Taiwan (2♀♀), unknown (1♂) .

Type series: holotype of Enicospilus tripartitus Chiu, 1954, ♀, Taihoku, Taiwan, 27.VIII.1937, J. Sonan leg. (TARI) ; paratype of same species, 1♂, no data (NHMUK).

Non-type series: 24♀♀ 8♂♂, Kakani (2,000 m), Nepal, VIII.1982 (2♀♀), VI (4♀♀ 1♂), VII (4♀♀ 3♂♂), 1-23 (2♀♀ 2♂♂).VIII (3♀♀ 1♂), IX (4♀♀), X (2♀♀). 1983, 1-30.V (1♀ 1♂), 1-14.VII (2♀♀).1984, M.G. Allen leg. (Figs 2C, 26); 1 unsexed, Sangu (ca 6,200′), Taplejung district, Nepal, 16-29.X.1961 ; 1♀, ShinKaiSi (1,340 m), Mt Omei, Szechuen, China ; 1♂, Kangra Valley (1,370 m), India, X.1899, Dudgeon leg. (all NHMUK); 1 unsexed, Genka-yama, Okinawa-hontô, Okinawa Pref., Japan, 4.V.1964, T. Takara & T. Kakinohana leg. (MNHA) ; 1♀, Kuanhsi, Taiwan, 29.VIII.1968 (MsT) (TARI) .

Distribution.

Eastern Palaearctic and Oriental regions (Yu et al. 2016). Gauld and Mitchell (1981) recorded this species from Nepal.

Diagnosis.

Head (Figs 2C, 26B-D): GOI = 2.2-2.9; lower face 0.7-0.8 × as wide as high; clypeus moderately to strongly convex in profile, its lower margin more or less blunt; mandible rather weakly twisted by 10-20°, moderately long, proximally tapered and distally parallel sided, its outer surface flat but with conspicuous dense setae and a proximal deep concavity; upper mandibular tooth 1.2-1.6 × as long as lower one; posterior ocellus close to eye; antenna with 55-66 flagellomeres and 20th flagellomere 2.2-2.4 × as long as wide.

Mesosoma (Fig. 26E): mesopleuron entirely more or less densely punctate and submatt; scutellum with lateral longitudinal carinae reaching posterior end and convergent posteriorly; metapleuron densely punctate as mesopleuron; propodeum weakly declivous, its posterior area moderately reticulate, outer margin of propodeal spiracle not joining pleural carina by a ridge.

Wings (Fig. 26F): fore wing with AI = 0.3-0.6, CI = 0.3-0.4, ICI = 0.5-0.7, SDI = 1.2-1.6; fore wing vein 1m-cu&M almost evenly curved to slightly sinuous, 2r&RS almost straight; fenestra and sclerites of discosubmarginal cell of fore wing as in Figure 26F; fenestra of fore wing not very long and its anterodistal corner distinctly separated from proximal end of vein RS; proximal sclerite triangular, separated from distal one, strongly pigmented; central sclerite strongly pigmented and sclerotised, well-delineated oval and its major axis parallel to distal margin of fenestra, positioned in mediodistal part of fenestra; distal sclerite absent to weak; proximal corner of marginal cell of fore wing uniformly setose; vein 1cu-a subinterstitial to antefurcal to M&RS by less than 0.2 × 1cu-a length.

Colour (Fig. 26): body including interocellar area entirely reddish brown; wings hyaline.

Differential diagnosis.

Four Oriental Enicospilus species, E. laqueatus, E. pseudantennatus, E. vestigator, and E. tripartitus, have similar fenestra, sclerites, and fore wing veins (e.g. Figs 15F, 21F, 26F), as mentioned under E. laqueatus and E. pseudantennatus . Among them, E. tripartitus is readily distinguishable from other species by the outer mandibular surface: outer surface of mandible with very dense setae and sharp and rather deep proximal concavity in E. tripartitus (Figs 2C, 26B, C), but more or less flat proximally with scattered setae in E. laqueatus (Fig. 15B, C) E. pseudantennatus (Fig. 21B, C) and E. vestigator .