76 



UNITED STATES NATIONAL MUSEUM BULLETIN 2 63 



sciTinent as loiitj as the four foll()wiii<z: segnieiits to- 

 "•etlier, bnishlike bristles on iiiti'riu)\ entral surface 

 dense and yellowish. Midler (])!. 2.S, fi<r. 12) distinctly 

 Ioniser than iiindlcs: feniiii' sonicwlial Ijiownish on 

 basal half, distinctly shorter than lil)ia; apicoxentral 

 margins willi i)lack short l)ristly hairs; til)ia a liltle 

 lonjier than tarsus, with one apical spur and one or 

 two very weak short bristles at ajjex; first tarsal sesi- 

 inent distinctly shorter than half llie leni;tli of lil)ia, 

 shorter tiian the four followinii- se<;rnents toiietlier, 

 brushlike bristles on ventral surface blackisli and 

 spar.se. Hindleij,- (pi. 2S, fig. i;i) soinewliaf thicker than 

 others; femora l)rownish on middle lialf. as loni; as 

 tibia, dorsal ape.\ with one pair of black bristly hairs; 

 tibia very sli<i-iitly sliorter tlian tarsus; first tarsal 

 se<inient rather brojul, a little shorter than the three 

 following segments togetlier, brushlike l)ristles as on 

 niidtarsus, with one or two cons])icuously long l)ristles. 



Length: Body 2.4-3.5 mm, wing 2.S-,'5.,S mm. 



Fem.vle. — Quite similar to male, but scutellum more 

 yellowish. Abdomen (pi. 28, fig. 8): si.xtii tergum very 

 sliglitly longer than fifth, anterior mafgin with one 

 |)air small brownish spots, and at roots of each of four 

 black lujirginal bristles a blackisli dot; basal segment 

 of oviposiler flat, lateral earinae castaneous, blackish 

 toward basal half, transversely striated, microscopi- 

 cally black pubescent. 



Length: Body (without ove])ositor) 2.8-2.9 mm, 

 wing :3-3.2 mm. 



Types.— Holoty|)e, d', USNM tiOoSO; paratyi)es, 

 5 cf , 9 (USNM), 2 (BMH), remainhig in MAS; total 

 9 cT, 3 9 from Iriomote Is., Jan. 15-9. 



Genus Sphenella Robineau-Desvoidy 



Sphenella Rol)ineau-n<'svoifiy, 1830, p. 773. — Shiniki, 1933, 



p. 400. 

 Sinctira Lioy, 1S64, p. 1024. 



Splwnella indica Schiner 



Plate 2!) 

 Sphenella indica Schiner, 1S68, ]). 2(17. —Shiniki, 1933, p. 402. 



A small black s|)ecies covered with a heavy but 

 short yellowish i)id)escence. The yellowish scutellum 

 is rather long, and the dark brown wing has a l)road 

 subajjical std)hyalinc whitish band. 



Male. — Head semicircular, nearly as wide as thora.x, 

 broader than high, 1..") times as wide as long. Frons 

 (j)!. 29, fig. '^) distinctly wider than one eye, slightly 

 narrowed forward, longer than wide, orange yellow, 

 posterior half dull waxy color, more or less whitish 

 tomentose, orbits distinctly yellowish pubescent, me- 

 dian portion of anterior half with yellowish, erect, 



obtusely pointed setae; huuile whitish, but not con- 

 s|)iciious; \ertical calli waxy greyish yellow, short, 

 extending to just anterior to median ocellus; ocellar 

 triangle nearly 15 as wide as vertex, blackish, with 

 a few yellowish blunt setae, transverse carina just 

 behind triangle more or less distinct. Face (pi. 29, 

 hg. 4) strongly conciive, upper mouth-edge distinctly 

 produced forward, antennal grooves rather in<lisfinct, 

 orbits narrow and nearly same width throughout 

 entire length, light waxy yellowish, distinctly whitish 

 tomentose, vibrissal margin with blackish short cur\'ed 

 setae and bristly hairs below. Back of head (])1. 29, 

 fig. 2) moderately swollen, upper portion more or less 

 flattened, yellow, moderately dusted, with upper 

 median portion blackish, lateral swellings with many 

 bristly yellowish hairs; cheeks moderately wide, a 

 rather distinct genal groove, somewhat paler than back 

 of head. Eye comparati\ely large, in front view some- 

 what rhomboidal, with inner margin rather distinctly 

 angulate; profile distinctly oblique, oblong, with u])i)er 

 angle somewhat pointed, posterior margin slightly 

 and anterior margin strongly curved outward. All 

 bristles mostly blackish: ocellars dix'ergent, longer 

 thati front o-orbitals; fronto-orbitals 2:2, the u|)per 

 su])erior pair yellowish and conspicuously shorter than 

 remainder, the inferior directed distinctly inward but 

 never crossed; post verticals yellowish, parallel, slightly 

 longer than upper sujjerior fronto-orliitals; inner ver- 

 ticals longest of all bristles, very slightly cm-ved in- 

 ward at tips, outer pair yellowish and slightly longer 

 than lower superior fronto-orbitals; occi|)itals one pan-, 

 yellowish, distinctly shorter than postvertical; about 

 four yellowish occipital liristles distinctly longer than 

 occijiitals; genal bristle rather weak. Antennae (|)1. 

 29, fig. 5) 3^ellow to orange yellow, not attaining oral 

 margin; first segment with short whitish bristly setae 

 on dorsal apex; second segment nearly two-thirds 

 as long as following, with median bristle black and 

 more or less distinct; third segment fully 1.5 times 

 as long as wide, very slightly narrowed toward the 

 hardly rounded ai)ex, dorsal tip more or less ])ointed, 

 dorsal margin very slightly concave at just before 

 tij), furnished with blackish rather conspicuons 

 ])nbescence on the dorsal and apicsil borders; arista 

 black, with basal segments yellowish, microscopically 

 black i)iibcscent. Pal|)i (pi. 29, fig. 6) light yellow, 

 toward a])ex more or less reddish yellow, com])ara- 

 tively long, apical portion with black \ery sparse 

 bristles, ventral margin witJi rather fine bidwn hairs 

 becoming yellowish tnward the basal half. 



Thorax nearly 1.3 times as long as wide, as wide as 

 high. Mesonotiim (i)l. 29, fig. 7) as long as wide, (piad- 

 rate, black, obscured by yellowish-grey tomentiun. 



