DIPTERA 



39 



front pair at the tip and the two posterior pairs in their apical half dark brown, tibiae 

 brownish-yellow, tarsi black ; all the femora with three rows of long conspicuous bristles, 

 fore tibiae with a long and intermediate tibiae with a rather shorter externo-median 

 bristle, both with three or four apical bristles, the intermediate pair with a very long 

 apical one beneath, hind tibiae with a long bristle at the middle of the inner surface, three 

 long ones on the outer surface and four or five apical or subapical ones, fore tarsi with a 

 long slender hair on each side at the tip of each joint. Wings clear in their basal half, 

 but distinctly infuscated in their apical half, veins dark, tegulae hyaline with yellowish 

 margins. 



Hab. Hawaii, one female, Kilauea, December 1896. 



(11) Cocnosia bisiia, sp. nov. 



^. Long. 6\ mm. ; al. 6 mm. Front one-fifth of the width of the head, black, 

 orbits, vertical triangle and face with yellowish-grey tomentum, palpi yellow, antennae 

 obscurely yellowish with the apical two-thirds of the third joint dark brown, arista long, 

 shortly plumose on its basal half Thorax with two presutural dorso-central bristles, the 

 anterior of which is much smaller than the other, dorsum, pleurae and scutellum light 

 yellowish-cinereous, halteres light yellow. Abdomen with the first segment entirely 

 yellowish, second yellowish with two dark brown spots on the middle of the dorsum, 

 between the spots the ground-colour is cinereous, third cinereous with two subquadrate 

 black spots, the anterior and posterior margins both yellowish, fourth cinereous with 

 a large black spot covering the greater part of the dorsum ; all the segments with lateral 

 bristles, second segment with a hind marginal row of weak bristles, third segment with 

 two small bristles near the middle of the dorsum, a pair of very strong and conspicuous 

 bristles near the middle of the hind margin, and a single weaker bristle on each side of 

 the latter, fourth segment with a few weak hind marginal bristles. Legs including the 

 fore coxae yellow-, tarsi blackish ; fore temora with four and intermediate femora with 

 three rows of conspicuous bristles, the latter also with two subapical bristles above, hind 

 femora with three rows ot long bristles, tore and intermediate tibiae with a long, con- 

 spicuous externo-median bristle and several strong apical and subapical bristles, that 

 beneath the apex of the intermediate pair nearly as long as the metatarsus, hind tibiae 

 with two very long bristles on the outer surface, one very long curved one near the 

 middle of the inner surface, one long subapical one on the hinder surface and three or 

 four shorter ones at the apex, fore tarsi similar to those of C. /ojigipcs. Wings slightly 

 yellowish-tinged, veins dark, tegulae yellowish. 



Hab. Hawaii, one female, Olaa, December 1S96. 



