ARGTEAM(EBA. 223 



covered not very closely with elongate bright yellow hair-like 

 scales, these being abseut towards the vertex; also with stiff 

 black hairs from vertex down to and below antennje. Antennae 

 blackish grey, 3rd joint shortly conical, with rather long style, and 

 the usual pencil of sliort hairs at tip. Underside of head black, 

 some stiff black hairs and a small quantity of deeper yellow hair- 

 like scales on each side below, but not contiguous to, base of 

 antennae ; mouth-opening small, black ; occiput rather widely 

 produced behind eyes, black, with a patch of small yellow scales 

 behind the middle of each eye, and a fringe of very thick short 

 dark brown hairs at hinder margin of occiput. T/«or.'Y.L' (somewhat 

 denuded) black, with moderately thick bright yellow and whitish- 

 grey bristly scale-like hairs intermixed around the shoulders, the 

 sides and anterior margin of dorsum, the \Ahitish-grey scaly hairs 

 in this latter part being more prominent ; dorsum with ver}' short 

 recumbent bright ^^ellow liairs ; the usual strong bristles towards 

 the sides ; a certain quantity of stiff" black hairs on anterior and 

 posterior parts of thorax, whilst the dorsum is lightly covered 

 with softer sparser black [pubescence. Scutellum blackish, some- 

 times dull reddish brown, with very short recumbent bright 

 yellow hairs and soft black pubescence, and a row of about twelve 

 long curved brownish-yellow bristles on posterior margin. Abdo- 

 men blackish, with short bright yellow recumbent hairs and longer 

 yellow bristly hairs, more or less in a row towards the hind border 

 of each segment; at each side at the base of the abdomen a 

 large bunch of long milk-white scale- like bristly hairs, the edges 

 of the segments bearing rather thick yellow bri^tly hairs, with 

 some similar long black hairs about the middle of the actuul edges 

 of each segment ; the last three or four segments bear some large 

 elongate milk-white scales, and isolated similar scales are attached 

 here and there towards the sides of the posterior marg^ins of some 

 of the other segments. Venter blackish, with rather thick yellow 

 and white hairs on the posterior borders of all the segments ; 

 genitalia rather large, concealed, brownish yellow, apparently 

 consisting of a pair of plates. Lcgs^ with coxoe and femora dark 

 broMn ; fore coxae, at least, w ith some yellow hairs and. black 

 bristles ; tibiae and tarsi brownish yellow, both, with tlie femora 

 also, with very short bristles. Wings hyaline; basal half blackish 

 brown, the limits of the colour forming an irregular diagonal line 

 from the fork of the 2nd longitudinal vein (which is immediately 

 above the anterior cross-vein) towards the anal margin ot the wing 

 (though the colour dies away at the border), and just enclosing 

 the base of the discal cell and the posterior cross-vein ; costal and 

 subcostal cells blackish brown to their tips; a semi-hyaline elongate 

 spot in marginal cell immediately proximad of fork of 2nd longi- 

 tudinal vein, another similar spot just below it, in first basal cell, 

 in which same cell there is a third similar spot towards its base ; 

 an irregularlj^-shaped semi-hyaline spot of some little size at. upper 

 outer angle of 2nd basal cell; halteres yellowish, with whitish clubs. 

 Length, 6-8 mm. 



