144 NEMESTHINIDJE. 



yellowish, hind margins of segments narrowly yellowish ; genitalia 

 yellow, witli two rather exposed terminal lamellae. Legs yellowish ; 

 coxae, femora (except base and tips), tips of hind tibiae broadly 

 and all tarsi (except base of middle pair) dark brown. Wings 

 grey ; two slightly darker streaks over the " cross-veins " ; stigma 

 larpe, dark brown ; halteres large, dirty yellow. 



Length, 5 mm. 



Described from a single $ in the British Museum in fair 

 condition from Naini Tal, 7000 ft., vi. 1900 (Lt.-Col Giles). 



A rather thick-set species. 



A $ taken by Mr. T. E. Fletcher may be this or a very closely 

 allied species, differing in possessing distinctly longer, wholly 

 blackish-grey antennae, no signs of yellowish margins to abdominal 

 segments, and being wholly more grey than yellowish ; Hazara 

 District, Dungagali, 8000 ft., 21-24. v. i915. 



111. Chrysopilus alternatus, sp. nov. 



(S . Head with the lower and hinder facets of eyes slightly 

 smaller than front ones, but not sharply demarcated and of the 

 same dark brown colour ; vertical triangle small, blackish, ocelli 

 inconspicuous ; frous and front of head greyish ; antennae bright 

 yellow, 1st joint greyish, arista black ; epistoma blackish ; pro- 

 boscis and palpi bright yellow, with some soft hairs ; some pale 

 yellow hairs on inner side of head; occiput grey, with short hairs 

 towards margin. Thorax and scutellum yellowish brown, with 

 short, rather coarse, bright yellow pubescence ; pleurae greyish. 

 Abdomen with 1st segment and base of 2nd yellowish; of the 

 remainder, rather more than basal half of each blackish brown, 

 the remaining part yellowish; the whole dorsum with short pale 

 yellow hairs ; venter similar. Legs yellow, tibiae and tarsi very 

 slightly but uniformly duskier. Wings pale yellowish grey ; 

 stigma large, dark brown, its outline not clearly defined; halteres 

 yellow, knobs brownish. 



Length, 8 mm. 



Described from a single d 1 in the Indian Museum from Guindy, 

 Madras; and two subsequent specimens from Coonoor, 5. ix. 1911 

 (Fletcher); and Lebong, 4500 ft., 2-9. vi. 1909 (Hoivlett). 



Family NEMESTRINIDiE.* 



Head transverse, as wide as or a little narrower than thorax, 

 set close upon it ; eyes generally widely separated in both sexes, 

 but in some cases narrowly separated or contiguous for some dis- 

 tance in S and then only narrowly separated in $ , generally bare, 

 occasionally with dense or long pubescence; facets generally of 

 uniform size ; three ocelli. Proboscis varying from very long 

 (porrect or bent down) to very short and thick ; labella variable 



* This family has occasionally been called the Hirmoiicuridce, but the 

 claims of the title here retained have been fully established. 



