DoUchopodida} of St. Vincmt (West Inclies). 327 



Abdomen only a little blackish above, but still with black 

 hairs 



Length TG mm. ; of wing, 1'6 mm. 



One male, one female. 1000 feet. 



4. Chrysotus alhipal'pus, n. sp. 



Minute blackish species, the male with contiguous eyes and 

 large white palpi. 



$ . Eyes briefly contiguous or just touching on the face, with 

 some very large facets at this point ; the palpi are large, snow- 

 white ; the front, and also the facial triangle below the eyes 

 j'ellow-dusted on a green colour. Antennaj small, black, the third 

 joint not enlarged, rounded, with apical arista. Cilia of inferior 

 orbit white and rather long. Dorsum of thorax green, somewhat 

 golden, moderately shining ; a dark stripe along the lateral edge. 

 Pleurae black with white dust ; tegular somewhat iufuscated, with 

 black cilia ; halteres yellow. Abdomen dark green, scarcely 

 shining, short, somewhat clubbed toward the apex. Hypo- 

 pygium concealed, some small dark processes slightly visible, more 

 remote than usual from the apex of abdomen. Coxae and femora 

 black, the former with pale hairs ; tibiae vai-ying from yellow to 

 brown ; bases of tarsi concolorous with tibiaj, tips darker. Pulvilli 

 of fore tarsi considerably, of the middle tarsi less, enlarged. Wings 

 tinged with brown, considerably rounded behind, fourth vein 

 ending in the apex. 



$ . Face of moderate width, white pollinose, tibiae usually 

 light-yellow. Otherwise substantially as in the male. 



Length 1-5 ; of wing, 1"3 mm. 



Numerous specimens. May, June. 500-1500 feet. 



The variability of this species is somewhat puzzling ; 

 in some specimens the abdomen is deep violet, in others 

 the halteres are yellowish-white. 



5. Chrysotus niger, n. sp. 



Palpi brownish ; eyes not quite contiguous ; face and front 

 opaque black, the latter a little greenish. Dorsum of thorax black, 

 scarcely greenish. Pleurae, abdomen, cox«, and femora black, the 

 00X98 with brown hairs. Halteres black, the stem brown ; tibiae and 

 tarsi blackish, sometimes more brownish, in the female yellowish- 

 brown and the femora brown. Otherwise as the preceding species. 

 Length TSmm. 



Seven males, six females. 



