108 SYEPHIDiE. 



inicroscopie pale hairs towards hind margiu. Abdomen con- 

 colorous, with a bluish tinge ; -nd segment twice as wide as 3rd, 

 barel}'^ wider at tip. In c? , with a short tooth-like process on 

 eacli side of 1st segment, just behind the halter, and three pro- 

 minent black bristles, the front one the smallest. Pubescence of 

 abdomen whitish, sparse, short and uniform, longer at sides, 

 longest on sides of 2nd segment and on dorsum of last segment 

 in $ . Venter dark, with sparse pale pubescence ; under side of 

 last segment of abdomen in (S with about seven long, strong, 

 socketed, black bristles on hind margin, slightly curved upwards 

 as though to ])rotect the genitalia; the latter large, black, shining, 

 twisted to the left, with long, pale, stiff and soft hairs. Legs : 

 front pair dirty brownish-yellow; femora and tibiae darker, except 

 at base and tip ; middle legs similar, but with a greater extent of 

 black. Hind legs shining black with a bluish tinge, femora and 

 tibi* both narrowly orange at base ; also with a narrow ring on 

 latter at or just beyond middle, the ring broader in the $ ; tarsi 

 black, with dense rich orange-brown pubescence below. Pubes- 

 cence of legs microscopic or absent ; two or three long isolated 

 hairs on upper side of hind femora near tip, and a row of rather 

 small spines below. In $ , anterior legs all yellowish except tips 

 of tarsi, which are darker. Wings jellowish- grey , very iridescent ; 

 stigmatic region, anterior cross-vein, base of discal cell, tips of 

 2nd and 3rd veins and outer side of 1st posterior cell, narrowly 

 brown-infuscated ; anterior cross-vein just before middle of 

 discal cell. Halteres very pale yellow. 



Length, 7i mm. 



Described mainly fx-om a {ti,pe) S from Sureil, Darjiling Dis- 

 trict, 5000 ft., 11-31. X. 1917 (Annandale and Gravehj), and from 

 the ty^je 5 in the Pnsa collection from Mussoorie, ix. lyOO. 



Type (S in Indian Museum in indifferent condition. 



Tlie species is remarkably like the European .S'. dunipcs, Tall., 

 but quite distinct, as in the latter the tooth and bristles at the 

 base of the abdomen are absent and the wings are quite clear. 

 There are also one or two other minor differences. 



85. Sphegina tristriata, Bmn. 



Splierjina tristriata, Biuaetti, liec. Ind. Mus. viii, p. 165, pi. vi, fig. 7, 

 wing (1913). 



$ . Head : frons uniformly wide, about one-fourth of the head, 

 shining black, but not brilliant. Eyes dull red, antennae brownish- 

 yellow, 1st joint brownish, 3rd a little infuscated above at the 

 tip. Mouth-parts and proboscis yellowish. Tliorax : ground- 

 colour brownish-yelloAv, but dorsum almost wholly occupied by 

 three practically contiguous dark brown stripes, with only a brief 

 space between them (at their middles) as they are united on the 

 anterior margin and practically so near the posterior margin also ; 

 pleurae dark brown ; scutellum concolorous. Abdomen mainly 



