Enicospilus bifasciatus (Uchida, 1928)*

Shimizu, So, 2020, The Nepalese species of the genus Enicospilus Stephens, 1835 (Hymenoptera, Ichneumonidae, Ophioninae): a preliminary revision and identification key to species, Deutsche Entomologische Zeitschrift 67 (1), pp. 69-126 : 69

Enicospilus bifasciatus (Uchida, 1928)* Fig. 5

Henicospilus bifasciatus Uchida 1928: 222; holotype ♀, Taiwan, SEHU, examined.

Material examined.

7♀♀ 3♂♂: Nepal (2♀♀), Taiwan (5♀♀ 3♂♂) .

Type series: holotype of Henicospilus bifasciatus Uchida, 1928, ♀, Baibara, Taiwan, Uchida leg. (SEHU) .

Non-type series: 2♀♀, Godaveri (1,550 -1,700 m), Nepal, 1.VI.1984, M.G. Allen leg. (LT) ( NHMUK) (Fig. 5 ) ; 1♂, Bukai , Taiwan, 13.VI.1934, L. Gressitt leg. ( NHMUK) ; 1♂, Horisha , Taiwan, V. 1927, Sonan leg. ( TARI) ; 1♀, Musha , Taiwan, IV.1938, Sonan leg. ( TARI) ; 1♂, Shinten , Taiwan, IV.1921, Sonan leg. ( TARI) ; 2♀♀, Taihoku , Taiwan, I. 1924, Sonan leg. ( TARI) ; 1♀, Taipei, Taiwan, V.1950, Chiu leg. ( TARI) .

Distribution.

Oriental region ( Yu et al. 2016). Newly recorded from Nepal.

Diagnosis.

Head (Fig. 5B-D ): GOI = 3.1-3.4; lower face 0.6-0.7 × as wide as high; clypeus moderately convex in profile, its lower margin acute; mandible rather strongly twisted by 55-65°, moderately long, evenly tapered, its outer surface without a diagonal structure; upper mandibular tooth 1.2-1.3 × as long as lower one; posterior ocellus close to eye; antenna with 54-56 flagellomeres and 20th flagellomere 3.1-3.3 × as long as wide.

Mesosoma (Fig. 5E ): mesopleuron rather coarsely longitudinally punctostriate to striate; scutellum with lateral longitudinal carinae reaching posterior end and convergent posteriorly; metapleuron rather coarsely striate; propodeum evenly weakly rounded, its posterior area moderately reticulate, outer margin of propodeal spiracle joining pleural carina by a ridge.

Wings (Fig. 5F ): fore wing with AI = 0.7-1.0, CI = 0.4-0.5, ICI = 0.2, SDI = 1.1-1.2; fore wing vein 1m-cu&M evenly curved, 2r&RS almost straight, centrally broadened; fenestra and sclerites of discosubmarginal cell of fore wing as in Figure 5F ; fenestra of fore wing not very long and its anterodistal corner distinctly separated from proximal end of vein RS; proximal sclerite triangular, confluent with distal one, strongly pigmented; central sclerite rather weakly pigmented and sclerotised, drop-shaped and its major axis parallel to vein 2r&RS, positioned in mediodistal part of fenestra; distal sclerite present proximally and vestigial distally; proximal corner of marginal cell of fore wing very sparsely setose, almost glabrous; vein 1cu-a subinterstitial to antefurcal to M&RS by less than 0.2 × 1cu-a length.

Colour (Fig. 5 ): body entirely pale yellow with black marks on mesosoma, interocellar area, and posterior segments of metasoma; wings hyaline with two strongly infumate patches in the central part of the discosubmarginal cell (from anterior end of M&RS to base of 1m-cu&M) and the central part of the marginal cell (from anterocentral margin to base of RS).

Differential diagnosis.

Enicospilus bifasciatus is a very distinctive species and no closely related species are currently known. Hence, it is easily distinguished from all Enicospilus by many characters listed in the above diagnosis as well as identification key, such as two strongly infumate patches in the central part of the discosubmarginal cell (from anterior end of M&RS to base of 1m-cu&M) and the central part of the marginal cell (from anterocentral margin to base of RS) of fore wing, characteristic shape of sclerites of discosubmarginal cell of fore wing (cf. Fig. 5F ), very sparsely setose and almost glabrous proximal corner of marginal cell of fore wing, and small value of ICI (= 0.2).

Figures

Figure 5. Enicospilus bifasciatus (Uchida, 1928), ♀. A. Habitus; B. Head, frontal view; C. Head, lateral view; D. Head, dorsal view; E. Mesosoma, lateral view; F. Central part of fore wing.