Enicospilus nigristigma Cushman, 1937 Figure 31

Enicospilus nigristigma Cushman, 1937: 309; HT ♀ from Taiwan, DEI, not examined.

Specimens examined.

Total of 26 specimens (19♀♀7♂♂): Japan (18♀♀7♂♂), Taiwan (1♀).

Distribution.

Oriental region (Yu et al. 2016).

JAPAN: [ Ryûkyûs] Kagoshima (Konishi 1993; present study) and Okinawa (Konishi 1993; present study).

Bionomics.

Unknown.

Differential diagnosis.

This species is one of the largest Japanese ophionines, along with E. nigronotatus and Dicamptus nigropictus (Matsumura, 1912). The habitus and sculpture of this species are very similar to E. stimulator (Smith, 1865), but E. nigristigma can readily be distinguished from E. stimulator by the larger fore wing fenestra and quadra. Moreover, this species is easily distinguishable from all other Japanese Enicospilus by the following combination of character states: large size (i.e., fore wing length always greater than 20.0 mm); interocellar area black (Fig. 31C); mesopleuron coarsely longitudinally striate (Fig. 31E); metapleuron and scutellum coarsely rugose (Fig. 31E); and fore wing fenestra covered with a large unpigmented quadra (Fig. 31F).