62 T. OKADA 



differs from it in having paler periorbit (black in subsplendens,) mostly yellow front 

 (mostly dark in s.), <$ anal plate as large as in S. graminwm (Fallen) (smaller in 5.), 

 and black fore tibia. 



Scaptomyza (Scaptomyza) melanissima sp. n. 



(Text-figs. 170-175) 



o\ $. Body about 1 -8 mm. Head slightly broader than thorax. Eyes dark purplish brown, 

 thickly pilose, relatively small and oval. Antennae with second segment yellowish orange, 

 dorso-anteriorly darker ; third pale yellowish orange, triangular. Arista with five short 

 branches including a moderate fork, without ventral branches. Palpus yellow, apically swollen, 

 with a few stout black ventral setae. Ocellar triangle black, large, grey pollinose, convex. 

 Periorbit broad, black, grey pollinose, anterior tip rounded, about three-fourths as long as front. 

 Front mostly black, grey pollinose, anteriorly orange, especially dark between periorbits and 

 ocellar triangle, with a few frontal hairs, anteriorly narrowing and narrower than length down 

 middle, posteriorly two-thirds as broad as head width. Clypeus small, yellowish grey. Face grey- 

 ish white matt, concave, wider below. Carina low, narrow, slightly wider below. Cheeks white, 

 posteriorly black, about one-third as broad as the greatest diameter of eye. Occiput black. 

 Postverticals long. Anterior reclinate orbital two-thirds as long as proclinate, just outside 

 proclinate, thrice as distant from posterior reclinate as from proclinate. Posterior reclinate 

 slightly longer than proclinate. Only one long stout black oral. 



Mesonotum matt black, bluish grey pollinose, with diffuse median and lateral black longitu- 

 dinal stripes, lateral pair extending to scutellum. Scutellum flat, bluish black pollinose. 

 Thoracic pleura black, grey pollinose, somewhat bluish. Three long humerals, lowermost 

 longest. Acrostichal hairs in six rows, relatively long. Posterior dorsocentrals more than twice 

 as long as anteriors ; distance between anterior and posterior dorsocentrals three-fifths distance 

 between anterior pair. Anterior scutellars very long, divergent, twice as long as scutellum ; 

 posteriors about three-fifths as long as anteriors, twice as distant from anteriors as from each 

 other. Sterno-index about 0-7. Legs yellowish grey, last tarsal segment large, black ; penulti- 

 mate black ; front and hind metatarsi longer than the other segments together, hind metatarsi 

 subequal to next three segments together. Preapicals on all legs, apicals prominent on mid leg. 

 Wings hyaline, narrow, slightly pointed at tip ; crossveins clear. i? 2 +3 medially convex 

 anteriorly, apically gently curved to costa ; 7? 4 + 5 and M somewhat convergent distally. C-index 

 about 40 ; 4V-index about 11 ; 4C-index about 05 ; 5x-index about 15 ; Ac-index about 

 2-6. Ci-bristle one ; C3-fringe on basal one-third. Halteres white, knob rounded and large. 

 Abdominal tergites slender, black, matt, somewhat bluish grey pollinose. 



Periphallic organs : Genital arch brownish black, pubescent, dorsally not narrowing, ventrally 

 broadly truncate and with several setae, subapically pale on caudal half. Clasper brownish 

 black, crescentic, marginally with a concave row of about twelve long stout black pointed teeth, 

 the row covering entire distal margin of clasper. Anal plate pale brownish black, elliptical, 

 setigerous, pubescent, lower tip narrowly pointed and with a few short setae. Decasternum 

 large, quadrate, tripartite. Phallic organs : Aedeagus yellowish grey, elliptical, basally 

 tapering, ventral margin serrated and with a yellow vertical rod ; apodeme brown, straight. 

 PI = 1-5. Anterior paramere minute, sensilla obscure, ventral fragma greyish brown, deeply 

 notched, lateral arms distally broadened, p.f. = abCdEf g HikLmn. Egg-guide lobe large, 

 oval, dark brown, distally broadly rounded, with about fifteen marginal and twenty scattered 

 discal strong black teeth. Basal isthmus narrow, black, about one-fifth as long as egg-guide 

 lobe. 



Holotype <$. East Nepal : Taplejung District, damp evergreen oak forest above 

 Sangu, c. 9,200', 2-26.xi.1961 (R.L.C.), BMNH. 



