240 SYEPiiiD.i;. 



tibire blackish, especially in fore and hiud pair, the fore tibice 

 bearing a fringe of long yellow hair on tlieir inner sides. Winr/s 

 pale grey, mediastinal cell uniformly brownish-yellow; no distinct 

 stigma. Halteres bright yellowish-red. Tegulse whitish-grey. 



Lewjth, 12 mm. 



Described from a single c? in good condition in the Indian 

 Museum collection from Margherita. 



This species must be very near nifjrocenescens, Rond., but liis 

 description of the abdomen does not quite agree, and he savs that 

 the antenna? are black, whereas in auronitens they are bright 

 reddish-brown. 



185. Xylota nursei, sp. nov. 



<S . Very like auronitens in general appearance but structurally 

 distinct. The structural differences are as follows :— The hind 

 trochanters bear a short blunt tooth in nursei instead of a slender 

 spur as in auronitens ; the hind tibisG are barely curved, instead of 

 well curved, especially on the inner side ; the hind femora have a 

 double row of very small spines on the outer under side, with 

 numerous additional spines, also a row of 8 or 9 much longer spines 

 on inner under side on apical half. In auronitens the hind 

 femora have a row of distinct spines a little stronger than usual, 

 on nearly the whole length on the outer under side, with a second 

 row of four similar spines near the tip. In nursei the vertical 

 triangle is equilateral, barely longer than the approximate length 

 of contiguity of the e3'es, but in auronitens the vertical triangle is 

 elongate and relatively distinctly longer. The non-structural 

 diflferences are as follows : — The abdomen is black-^eneous, with 

 the 2nd segment and basal half of the 3rd shining dull orange, 

 instead of cupreous with violet reflections (auronitens) ; the frons 

 and face are densely covered with bright yellow tomentum, 

 instead of shining blue-black, with wiiitish dust ; and the wings 

 are wholly grey instead of having a yellowish tinge. 



Length, about 12 mm. 



One d , Simla, viii.1898 (Col. Nurse). 



Type presented by (Jol. JS'urse to British Museum. 



186. Xylota carbonaria, sp. nov. 



c? . Head : eyes contiguous for nearly one-third of the distance 

 from upper angle of frons to hind margin of head ; vertical 

 triangle shining black, with a little brownish pubescence ; frons 

 and face whitish-dusted, without obvious pubescence. Antennae 

 orange, 1st and 2nd joints blackish. Proboscis black. Occiput 

 grey-dusted, with a lit^le short white pubescence on lower part. 

 Thorax and scutelhim finel)^ punctate, black, with inconspicuous, 

 depressed, golden-yellow pubescence, with also (seen from behind) 

 two well-separated whitish dust-stripes from anterior nearly to 

 hind margin. Pleura) moderately shining black, with grey dust ; 



