1909.] Records of the Indian Museum. 433 



yellow hairs over the whole dorsum. Sides of thorax cinereous 

 grey, yellowish at base of wing. Scutellum grey ; centre with a 

 slight greenish tinge. 



Abdomen. — Yellowish, first segments blackish grey, segments 

 2, 3 and 4 with a blackish, rather wide posterior border and dor- 

 sal stripe, remainder of segments blackish. Belly yellow, tip black- 

 ish. A few yellow hairs scattered over dorsum of abdomen ; black 

 hairs at tip. Genitalia bi-lobed, tawny yellow, with stiff black hairs. 



Legs. — Coxse and femora pale yellow, with a few yellow hairs 

 near the tip, on under side of latter, and with generally distributed 

 microscopic black hairs. Tibiae blackish yellow, with microscopic 

 black hairs and some stronger bristles ; tarsi similar, tips black. 

 Middle tarsi with two long spines at tip. 



Wings. — Quite clear, stigma distinct, dark brown but with- 

 out well-defined limits, traces of a pale yellowish stripe towards 

 tip of wing. Inner cross-vein placed before one-fifth of the discal 

 cell ; anal cell closed well before wing-border, Halteres yellow, 

 knobs black. 



Described from a single perfect cf in the Indian Museum col- 

 lection, taken by Dr. Annandale, 2-iii-o8, at the base of the 

 Dawna Hills, Lower Burma. 



N.B. — I have observed a character in the wings which may, 

 if constant, assist in determining the species. 



The upper branch of the fourth longitudinal vein, forming 

 the upper side of the discal cell, forks in some species absolutely 

 on the extreme outer corner of that cell, the two veinlets spring- 

 ing simultaneously, the outer side of the discal cell being practi- 

 cally quite straight. In this group I find (i) my new species 

 frater ; (2) a specimen in the Indian Museum collection labelled 

 "LepHs Pallidus, Bigot, sp. nov.," but which agrees with vSchiner's 

 " insularis " except for the black third antennal joint and the 

 absence of white spots above the antennae ; and (3) a 5 in the 

 above collection which would be ferruginosa, Wied., except for the 

 long thin palpi, and for this venation, and which specimen I now 

 regard as the probable ? of my frater, but which bears a label 

 " Leptis punctum, Bigot, sp. nov." 



A second group is formed by those species in which the 

 veinlets do not spring simultaneously from the corner of the 

 discal cell, but distinctly separately, the lower one sometimes from 

 the middle of the outer side of the discal cell, which side thus 

 always contains an angle. In (i) marmoratus, mihi, and (2) 

 luctuosus, mihi, the veins start close together yet quite distinctly 

 apart ; in (3) ferruginosa, Wied., (4) correcta, Os. Sac, (5) albopictus, 

 mihi, and (6) unicolor, mihi, the lower veinlet emerges from dis- 

 tinctly above the middle of the outer side of the discal cell, whereas 

 in the seventh and last species, simplex, Meij., this veinlet emerges 

 barely above the middle. 



In group 3 is one species only, — segmentatus , mihi, — in which 

 the veinlets separate so early as to appear as if the upper one had 

 cut off the upper corner of the discal cell. 



