BY ARTHUR WHITE. 41 



lighter in the centre, with a narrow black median stripe, and 

 indistinct side stripes ; a few black hairs on sides. Scutellum 

 drab. Abdomen banded with black and drab ; both thorax 

 and abdomen covered with pale yellow pile; sides of abdomen 

 with white hairs. Legs with femora black, tibiae and tarsi 

 brown, with joints and tips of tarsi darkened. Wings with 

 a slight brownish tinge ; stigma and veins brown. 



Female unknowu. 



This Sjiecies resembles C. rujipes, but may be distinguished 

 from tiiat species by its smaller size, by the femora being 

 black instead of light brown, by the thorax being drab and 

 striped, instead of black and uustriped, by the abdomen 

 being banded instead of uniformly black, and by the pile in 

 the male being pale yellow instead of golden. 



This species may be found resting on the stones in the bed 

 of mountain streams. I have met with it between November 

 30 and December 20, but no doubt it remains on the wing 

 until a considerably later date. 



2. Atherimorpha, Gen. nov. 

 Robust flies; antennae with a thickened arista; eyes 

 separated in both sexes; front hairy; hind tibiae with two 

 spurs. 



Fig. 1. Wing of Atherimorpha vernalis. 

 Head semicircular, about the same breadth as the thorax; 

 front in the male densely, in the female slightly, hairy ; face 

 not descending below the eyes. Proboscis thick, protruding. 

 Palpi almost as long as the pi-oboscis, of equal breadth 

 throughout, and bearing very long hairs. Eyes widely 

 separated in both sexes. Antennae situated very low, the 

 three joints small and of almost equal breadth, the first being 

 slightly the longest, and the second the shortest of the three, 

 the third gradually drawn out terminally into a thick arista. 

 Thorax arched and hairy. Abdomen robust, truncate in the 

 male, pointed in the female. Legs long ; femora with 

 numerous small bristles ; anterior tibiae without spurs, 

 middle and posterior tibiae with two spurs. Wings with a 

 distinct stigma, but no other markings; fourth posterior ceil 

 wide open ; anal cell closed. 



