DIPTERA 41 



(14) Cocnosia, sp. 



A female specimen, in bad condition, from Kilauea, Hawaii (September 1895), '^ 

 quite distinct from any of the species here described. The thorax is dark brown with 

 hght cinereous shoulders and pleurae, and the commencement of two dorsal stripes of 

 the same colour on the middle of the anterior margin. The abdomen appears to be 

 dark brown with three pairs of large black spots. The legs are blackish with reddish- 

 yellow knees. 



(15) Cocnosia, sp. 



A small species (3 mm.) with cinereous unicolorous thorax and abdomen and 

 blackish femora, is represented by four specimens from Molokai Mts. (4000 — 6500 ft.), 

 June to September 1893, but they are not in good enough condition for description. 



(16 and 17) Cociiosia, spp. 



Two species, not described here, are also represented in the collection formed by 

 Mr Perkins, but the material is in too bad a condition for description. They are from 

 Kona, Hawaii, and Molokai Mts. respectively. 



ACRITOCHAETA, cren. UOV. 

 o 



Front about one-third of the width of the head in both sexes, slightly prominent ; 

 face slightly inclined backwards and deeply excavated, the cheeks and chin extremely 

 narrow, facial ridges sharp-edged, a single strong vibrissa and a few shorter bristles near 

 the oral margin, chin with a row of fine, short bristles. Eyes bare, large, oval. 

 Antennae large, inserted considerably above the middle of the face and reaching almost 

 to the oral margin, arista almost bare, very thick in its basal half and gradually tapering 

 towards the apex. Proboscis a little longer than the head, palpi long and rather thick 

 but not clavate. Thorax with very short and inconspicuous macrochaetae on the dorsum, 

 so that it is difficult to distinguish them from the surrounding pubescence ; of the dorso- 

 central bristles four post-sutural may be distinguished which decrease much in size from 

 behind, before the suture are three or tour very small bristles of which perhaps two may 

 be reckoned as macrochaetae ; about six irregular rows of tiny bristles may be dis- 

 tinguished between the two rows of dorso-central bristles, and between the last pair of 

 the latter four more distinct pre-scutellar bristles ; scutellum with two small dorsal, two 

 decussating apical and a large and small pair of lateral bristles. Abdomen ovoid and 

 a little broader than the thorax, in the male with conspicuous subanal appendages, in 

 F. H. III. 6 



