1913.] E. Brunetti : Dip/era. 169 



dark brown, with short golden yellow pubescence ; hind pair with 

 rich golden brown pubescence below. 



Wings. — Pale grey ; a small brownish yellow infuscation in the 

 middle from the costa and the brown stigma, reaching posteriorly 

 to the 4th longitudinal vein. Tegulae and halteres brownish 

 yellow. 



Described from a single 9 taken between Renging and 

 Rotung (2200 ft.), 20-xi-ii. 



N.B. — Although with the general appearance of an Eristalis, 

 this is a true Sericomyia in every character. 



Chrysotoxum sexfasciatum, Brun. 



One cf taken between Rotung and Kalek (2000-3500 ft.), 

 i^-i^-mr\2. In this specimen the antennae show hardly any red 

 at their base, and the antennal protuberance is wholly shining 

 black. In all other respects it meets the description exactly. 



Mixogaster vespiformis, mihi, sp. nov. 

 (PI. vi, figs. 8-10). 



9 Assam. Long, barely 8 mm. 



Head. — Frons about half as wide as the head, with parallel 

 sides, black, closely wrinkled ; the dull-red eyes, bare, seen in 

 profile, not attaining either the upper or lower limits of the head. 

 Face with short bright yellow hair ; a narrow reddish brown stripe 

 across the frons, from eye to eye, immediately above the anten- 

 nae. The vertex gently curved, the whole of the face quite flat. 

 Antennae reddish brown, absolutely bare ; ist joint moderately 

 long, elongate, 2nd very short (easily overlooked), 3rd about six 

 times as long as the ist, elongate, slender, sub-cylindrical, very 

 slightly thickened beyond the middle, and tapering to a blunt 

 point, the whole antenna as long as from the frons to the tip of 

 the scutellum. A bare, comparatively small, curved arista near 

 the base of the 3rd joint. This joint is bent backwards across the 

 eyes after the fashion of Aculeate Hymenoptera. Back of head 

 blackish, a little bright yellow hair behind the eyes. 



Thorax. — 'Qnghl red, with a median black stripe about one- 

 third the width of the dorsum. Sides blackish with a stripe of 

 bright yellow hair from the ends of the transverse suture nearly to 

 the legs ; posterior margins of the dorsum with yellow hair. 

 Scutellum black, covered with bright yellow hair. 



Abdomen. — The ist segment narrowed immediately after the 

 base, black, the posterior border reddish brown; 2nd segment at 

 base of same width as the tip of the ist, but from its middle 

 rapidly widening ; 3rd segment widening still further, the greatest 

 width of the abdomen being at the juncture of the 3rd and 4th 

 segments, after which it rapidly narrows. The 2nd segment 

 black on basal half, with a peculiar dirty milk-white stripe each 

 side of the median line; apical half of segment reddish brown. 



