106 i.KrTin.F. 



like prolongation of each yellowisli wliite, last seven joints 

 (niakiug with scape 32 in all) with their comb wholly yellowisli 

 white ; proboscis orange-yellow. Thorax and ahJomen orange ; a 

 large black spot on pleurae in front of wing-base and another just 

 hehind wing-base ; sternopleura shining black ; abdomen with 

 2nd segment much the longest ; hind border of each narrowly 

 black, less distinctly so on 5th and 6th segments. Legs orange- 

 yellow ; hind coxse shining black ; hind femora and tibiae with 

 basal two-tliirds of each black; hind tarsi all black. Winr/s grey, 

 subcostal and marginal cells blackish ; halteres yellow. 



Length, 9 mm. 



Described from a unique i^ in the Indian Museum fi-om 

 Peshoke Spur. Darjiling, 2000 ft., vi. 1916 (L. C\ Hartless). 



70. Rhachicerus unicinctus, sp. nov. (PI. II, fig. 2.) 



5 . Head with frons brilliantly shining black, longitudinall}"^ 

 furrowed, at vertex one-third of head, slightly wider just above 

 level of antennae ; face dull black seen from below, but at least 

 upper part brilliantly white seen from above, narrowing towards 

 mouth ; proboscis short, thicl<, bulbous, orange, as are the up- 

 turned cylindrical palpi, slightly thickening towards tips ; eyes 

 brown; occiput moderately shining black, with a little short 

 brown pubescence towards margins. First two joints of antennfe 

 blackish above, orange below : 3rd with upper side and tips of 

 rays black, the intermediate part of rays orange-j^ellow ; 20 or 

 21 joints present in flagellum, according to whether the small 

 terminal prolongation is part of the last rayed joint or not: the 

 flattened irregularly-shaped elevation on which the antennae are 

 placed lemon-vellow. Thorax shining black, dorsum iiuely punc- 

 tate, with extremely short yellowish pubescence ; humeri and 

 mesopleurre dull shining yellowish ; scutellum like thoracic 

 dorsum. Abdomen slightly shining black ; 1st segment \eYy 

 short; 2nd longest, with a yellowish transverse band of moderate 

 width, of which the liiiid border lies just in front of middle of 

 segment and is punctuated by a row of small indentations, almost 

 giving the appearance of two segments; 3rd and 4th segments 

 barely narrower thnn 2nd ; 5th rapidly narrowing from base to 

 tip ; Gth, Tth, and 8th extremely nari'ow and very elongate, having 

 a telescopic appearance, the last one possibly forming two segments 

 (making nine in all) in addition to the two pale yellow elongate 

 lamellae ; whole abdomen with sparse short yello\^ish-white 

 pubescence; venter black, 2nd segment mainly dull yellowish. 

 Ijegs mainly orajige-yellow ; trochanters, about basal half of 

 femora, and hind tibia? wholly black. Wings yellowish grey, 

 A'itreous, stigmatic region a little yellowish brown, a slight infus- 

 cation at wing-tip ; halteres yellowish. 



Length, 8 mm. 



Described from one 2 in the Indian Museum from Peshoke, 

 Darjiling, 1000 ft., 26. v.-14.vi. 1916 (Graveh/). 



