Dolichopodidse of St. Vincent {West Indies). 325 



black hairs on the front side, middle coxae with a few coarse 

 blackish hairs in front, hind coxse with a single lateral bristle ; 

 near the end of each femur, on the outer side, are three or four 

 larger hairs ; on the anterior side of the middle tibia just below 

 the knee, is a single erect bristle, on the posterior side of the hind 

 tibiae are two or three small bristles. The pulvilli of the fore 

 tarsi are enlarged ; fore and middle tarsi infuscated from the tip 

 of the first joint, the length of the former exceeding that of their 

 tibiae ; hind tarsi shorter than their tibiae, the inf uscation beginning 

 near the base. Wings of only ordinary width, subhyaline, the 

 fourth vein ending exactly in the apex, the outline is more rounded 

 before the apex than behind it. 



Length 2*4-2'7 mm. ; of wing, the same. 



Numerous males and females. 500-1500 feet altitude. 



This species differs from sodalis, Loew, by its smaller 

 size and black bairs on the fore coxse. The female of 

 duhius differs from the male in having a slightly wider 

 face, smaller antennae, shorter and thicker abdomen, the 

 femora without longer hairs, and the tibiae with stronger 

 bristles. In a large series of specimens I notice con- 

 siderable variation : some of the specimens if alone 

 would no doubt be referred to Chrysotus, 



Chrysotus. 

 Meigen, Syst. Beschr., iv., 1 824. 



1. Chrysotus excisus, n. sp. 



(J. Eyes broadly contiguous on the face, with an area of 

 •enlarged facets ; front broad, short, deep bluish-green to bronze- 

 green in colour ; palpi and proboscis blackish. Antennae black, the 

 third joint very large, kidney-shaped, hairy along the outer part ; 

 arista apical, arising from a deep notch in the joint. In some 

 specimens this peculiarity is but little developed ; in others it is 

 very distinct ; in some specimens the point below the notch is 

 longer than the one above, giving the arista a subapicai position. 

 Cilia of inferior orbit small, brownish. Dorsum of thorax 

 bright bluish-green, sometimes more bronze or coppery ; pleurae 

 black ; tegulae and halteres yellow to brown, the former with black 

 ■cilia. Abdomen short, thick, black, scarcely with a green reflection ; 

 hypopygium concealed, sometimes with a minute brownish appen- 

 dage or two barely visible. Feet black ; from the knees down 



