DIPTERA 1,7 



segments with lateral bristles, second to iourth with distinct hind marginal bristles, the 

 third and fourth also with discal ones. Legs yellow, tore and intermediate tarsi at the 

 tip and hind tarsi wholly blackish, hind lemora with an incomplete blackish apical ring, 

 fore femora above and beneath with strong bristles, intermediate femora with three or 

 four apical bristles above and three or four along the basal half beneath, hind femora 

 with numerous bristles arranged in several rows, fore tibiae with several bristles at or 

 near the apex but no median one, intermediate tibiae with four apical, two subapical, 

 and one externo-median bristle, hind tibiae with about ten bristles in three rows and a 

 strong apical spine beneath. Wings clear, veins dark, tegulae yellowish. 



$. Long. 6 mm. ; al. 6 mm. Like the male, but the front narrower, a little darker, 

 the orbits narrower, antennae with the ist, 2nd and base of 3rd joints yellow. Thorax 

 with the anterior presutural dorso-central bristle small. Abdomen with an oval brown 

 spot on the first segment placed on the middle of the hind margin, instead of the central 

 longitudinal line, second segment with the angles ot the brown spot rounded oft, third 

 and fourth segments blackish with the sides and anterior angles cinereous, third segment 

 with two conspicuous bristles near the middle of the hind margin, these being the only 

 strong ones present on the dorsum of the abdomen. Legs yellow with all the tarsi 

 blackish, the hind femora as in the male, and the intermediate femora sometimes darkened 

 at the tip, tore tibiae with a median external bristle, hind tibiae with a very long bristle 

 about the middle of the inner surface and the other bristles somewhat longer than those 

 of the male. 



H.'^B. Hawaii, Kilauea — one male, August 1896, one female, September 1895, one 

 female, December 1896. 



(8) Cooiosia kauaiciisis, sp. nov. 



$. Long. corp. 5 mm. ; al. 4^ mm. Front about one-third of the width of the 

 head, dark reddish-brown, orbits and vertical triangle dull cinereous, face with dull 

 yellowish tomentum, palpi yellow, antennae dark brown with the base of the third joint 

 yellow, arista dark, and sub-plumose almost to the tip. Thorax with only one presutural 

 dorso-central bristle, dorsum, pleurae and scutellum dark cinereous, halteres yellow. 

 First segment of abdomen yellow, with a large triangular shining blackish-brown spot on 

 the dorsum and a dark brown spot on each side at the anterior angle, second segment 

 shining blackish-brown with only the anterior angles yellow and the posterior margin 

 yellowish cinereous, third segment shining blackish with the anterior portion narrowly 

 cinereous and the hind margin yellowish cinereous, fourth segment and end ot abdomen 

 shining blackish ; all the segments with lateral and the second to fourth with hind 

 marginal bristles. Legs yellow, tarsi darker, hind femora black in their apical halt ; 

 bristles much as in C. triangulijcra. Wings clear, veins dark, tegulae whitish-yellow. 



Hab. Kauai, one male, 4000 tt., July 1896. 



