34 FAUNA HAWAIIENSIS 



yellowish-grey, almost silvery, palpi yellow, antennae reddish-yellow, 3rd joint lighter 

 than basal ones, arista dark except at the extreme base and shortly plumose. Thorax 

 with only one large presutural dorso-central bristle, yellowish-grey on the dorsum with a 

 faint indication of three longitudinal lines along the course of the dorso-central and 

 acrostichal bristles, pleurae and scutellum more yellowish, halteres light yellow. First 

 and second segments of abdomen light yellow, the latter with a faint (sometimes hardly 

 perceptible) brownish triangular spot on the dorsum, third and fourth segments yellowish- 

 grey, each with two large adjacent or contiguous black spots on the dorsum. Bristles 

 of abdomen very long, ist and 2nd segments with long fine hairs but no strong bristles 

 on the dorsum, 3rd segment with two, and 4th segment with six hind marginal bristles, 

 2nd to 4th segments each with a lateral bristle situated half-way between the fore and 

 hind margins, genitalia somewhat prominent, giving the apex of the abdomen an almost 

 clavate appearance. Legs with the coxae, femora and tibiae entirely light yellow and 

 the tarsi blackish, all the femora with several long bristles, fore and intermediate tibiae 

 with five apical and one long externo-median bristle, hind tibiae with two long bristles 

 near the middle of the outer surface, the one nearer the apex being of unusual length 

 and subtended by another of almost equal length on the inner surface, a few conspicuous 

 bristles also near the apex and three or four short ones on the hinder surface. Wings 

 distinctly yellowish-tinged, with the veins yellow, tegulae also yellowish. 



%. Like the male, but the dark longitudinal lines on the thorax a little more 

 distinct, and the colour of the ist two abdominal segments darker, on the 2nd a trace 

 of a dark dorsal line or spot, fourth segment without conspicuous bristles. 



Hab. Hawaii, two males and one female, Kona, 2000 ft., September 1892. 



(4) Cocnosia I'a/ida, sp. nov. 



?. Long. 7^ mm. ; al. 7 mm. Front one-fifth of the width of the head, central 

 stripe black, becoming reddish-brown near the antenrfee, orbits in front with yellowish, 

 behind with cinereous tomentum, vertical triangle cinereous, face light yellowish-silvery, 

 palpi yellow, antennae as in C. dexioides, but hairs of arista decidedly shorter. Thorax 

 as in C. dexioides, but the dorsum bluish-cinereous and only the pleurae yellowish, 

 scutellum yellowish with a bluish-grey spot on each side near the base, halteres yellow. 

 Three basal segments of abdomen yellow, the first with a small transversely oval brown 

 spot behind the middle of the dorsum, the second with a pair of dark brown spots 

 separated by a cinereous streak, the third with a pair of smaller brown spots more 

 widely separated on a cinereous ground, fourth segment entirely cinereous ; the third 

 segment has a pair of strong bristles on the middle of the hind margin and a smaller 

 and finer pair on the anterior third of the dorsum, the other segments without dorsal 

 bristles but furnished as in C. dexioides with lateral bristles. Legs as in C. dexioides. 

 Wings with the veins slightly infuscated with yellowish-brown, tegulae yellowish. 



Hab. Maui, one female, Haleakala, 5000 ft., May 1896. 



