42 FAUNA HAWAIIENSIS 



both sexes without conspicuous bristles on the dorsum. Legs simple, with only a few 

 weak bristles, claws and pulvilli minute. Wings broad and short, broadly rounded at 

 the tip, and without costal spine ; auxiliary and first longitudinal veins rather widely 

 separated, the latter ending a little beyond the middle of the wing, third longitudinal 

 vein distinctly curved towards the fourth, anal vein not reaching the margin, anterior 

 transverse vein about the middle of the discal cell and distinctly before the tip of the first 

 longitudinal vein, posterior transverse vein straight ; tegulae large, the under scale about 

 twice as long as the upper. 



This genus seems to be allied to Cliaradrella V. d. Wlp. and Pygophora Schiner, 

 but differs from both in the extremely small cheeks and chin, the bare arista, the shape 

 of the abdomen, and the nature of the bristles. 



(i) Acritochaeta pulvinata, sp. nov. 



^ %. Long. Corp. J 3^, $ 4 mm. ; al. t '^\, % I rnm. Front reddish-yellow near 

 the antennae, gradually darkening to blackish-brown near the ocelli, orbits and vertical 

 triangle in the .? with yellowish, in the $ with light cinereous tomentum, face obscure 

 greyish-yellow, palpi yellow in the J, blackish in the $, antennae dark brown with the 

 basal joints obscure reddish-yellow, arista dark at the tip, reddish-yellow in its basal 

 half. Thora.x cinereous with three narrow brown longitudinal lines, shoulders yellowish, 

 in one specimen conspicuously reddish-yellow, pleurae light cinereous, scutellum cinereous 

 with reddish-yellow apex, halteres pale yellow. Abdomen reddish-yellow, gradually 

 becoming cinereous towards the tip, first segment with a more or less distinct pair of 

 brown spots near the posterior margin, second and third each with a pair of large 

 conspicuous triangular dark brown spots, the bases of which nearly touch the posterior 

 margin, fourth segment with a pair of similarly-coloured small round spots ; in addition 

 to these markings a dark, more or less interrupted line runs down the centre of the 

 dorsum, becoming more distinct on the middle segments. Legs yellow, in the t the 

 apical half of the fore tibiae and the fore tarsi are blackish, while the fore femora are 

 peculiarly bent upwards and furnished with a small pad or cushion of tiny hairs on 

 the upper surface near the apex, % with the fore femora (except at the base and apex), 

 the apical half of the fore tibiae and the fore tarsi blackish, and the tips of the hind 

 tibiae slightly darkened ; all the femora with weak bristles on the lower surface, those 

 on the fore femora a little stronger in the female, intermediate pair with a strong sub- 

 apical bristle above, fore tibiae only with a few apical or subapical bristles, intermediate 

 pair in addition with a small externo-median bristle and hind pair with about four short 

 ones on the outer and hinder surfaces. Wings hyaline and strongly iridescent, veins 

 light brown, tegulae yellowish. 



Hab. Hawaii, one male and two females, Olaa, July 1S95. 



Plate IL figs. 21, head of J, side view ; 22, fore leg of ^ ; and 23, wing. 



