XYLOMYIA. 99 



clear, highly iridescent ; venation normal, veins dark brown ; 

 halteres yellow. 



Length, 9 mm. 



Described from a single specimen in the Indian Museum, from 

 Naini Tal, W. Himalayas, 6000 ft., 5. vi. 1909 ; a second speci- 

 men from Shillong, 5000 ft. {Fletcher). 



67. Xylomyia nigricornis, sp. nov. 



5 . Head with frons gradually widening from vertex to above 

 antennae, where it is barely one-fifth the width of the bead, wholly 

 covered with yellowish pubescence, except immediately above 

 antennae, where the pubescence is yellowish white ; vertex dark 

 grey tomentose, with golden-yellow pubescence ; ocelli not very 

 conspicuous ; face with nearly parallel sides, fractionally wider 

 than lower part of frons, black, with greyish or yellowish grey 

 pubescence ; inner margin of eye slightly cut away a little above 

 antennae, at a spot where there is a peculiar and conspicuous 

 shining, black, smooth, elongate, triangular space devoid of facets ; 

 antennae blackish brown, a little pale about inner and under side 

 of 2nd scapal and 1st flagellar joints ; proboscis orange-brown; 

 palpi bright lemon-yellow, very large and erect, nearly hiding the 

 face ; occiput grey-tomentose, with some golden-yellow hairs on 

 margin, and longer ones-just behind vertex. Thorax black, thickly 

 punctulate, with black bristles ; seen from the front only there 

 are three longitudinal stripes of almost microscopic golden-yellow 

 pubescence ; humeri conspicuous, bright yellow, a thin dull yellow 

 line thence to wing-base ; hind corners of dorsum margined with 

 brown ; pleurae black, closely punctulate, with black bristles and 

 very short whitish pubescence ; scutellum bright lemon-yellow, 

 with lemon-yellow bristles, the base narrowly black ; metanotum 

 black. Abdomen distinctly 7-segmented, 1st and 2nd scarcely 

 separable except by the fringe of hairs on hind border of 1st; 

 1st segment orange-yellow, hind border broadly black : 2nd orange- 

 yellow, with a large round black spot in middle just clear of the 

 margins, hind margin yellowish white ; rest of segments black, 

 hind margin of 3rd to 6th inclusive yellowish white, clearly demar- 

 cated ; sides of very small 7th segment yellowish : all the black 

 parts of abdomen closely punctulate, with minute black bristles, 

 the yellow parts with short pale yellow hairs ; genitalia very small, 

 a pair of small brownish-yellow lamellae ; a little pale, rather long 

 pubescence at sides of 1st segment, and shorter similar pubescence 

 on sides of whole abdomen.; venter black, 2nd segment and hind 

 margins of remainder yellowish. Legs mainly yellow ; hind coxae 

 (except a patch on hinder side), hind trochanters, underside of 

 hind femora narrowly, inner and outer sides of same towards base 

 (the colour almost united on upper side), also extreme tips, black ; 

 anterior tarsi brownish black ; hind tibiae and tarsi black, except 

 upper side of former at base. Wings uniformly yellowish grey ; 



h2 



