Dolichopodidfe of 8t. Vincent (West Indies). 321 



of a species from St. Vincent, West Indies, which agree 

 substantially with the description, but are only 2 mm. 

 long ; in the males also the hairs on the underside of the 

 middle femora seem to be less conspicuous. It would 

 not be safe to describe the species as new without com- 

 parison with the types of opacus ; for the pi'esent I 

 consider it a small form of the latter. 



In the West Indian specimens, it is difficult to separate 

 Diaphorus from Chrijsotus. When the face and front 

 are parallel, I have followed the general rule of referring 

 all to Chrysotus that did not show in the male sex 

 elongated front pulvilli or large bristles at the end of 

 the abdomen. 



2. Diaphoriis approxlmatus , n. sp. 



$ . Face white pollinose, rectangular, the ground colour 

 blackish ; the eyes approximated on the front so as almost to 

 touch, the two frontal triangles and the narrow strip connecting 

 them whitish pollinose. Antennaj short, third joint crescent 

 shaped, with apical arista ; second joint with several radiating 

 black hairs of moderate length. Cilia of inferior orbit white. 

 Dorsum of thorax green, dusted with yellow, not very shining ; 

 pleura black with grey dust. Halteres and tegulas yellow, the 

 cilia of the latter brown, sometimes a little mixed with white. 

 Abdomen shining dark-green, with black hairs above, which change 

 to reddish on the sides ; hair of the venter long, delicate, pale. 

 The four bristles at the apex of the abdomen are small. Hypopy- 

 gium concealed. Coxae black ; femora brownish-black, yellow at 

 tip : on the outer and lower edge of the fore femora, near the tip 

 is a row of long hairs. Tibiae yellow, tarsi infuscated from tht 

 tip of the first joint, pulvilli of fore tarsi enlarged. Wings 

 slightly brownish, very broad ; the greatest width is about the 

 middle ; the third vein toward the tip curves noticeably backward. 

 Length 3 mm.; of wing, 2*5 mm. 



Numerous males. Sea level to 1000 feet. May. The 

 tegular cilia seem to be pale in some lights and brown 

 in others. 



3. Biapliorus parvulus, n. sp. 



Minute, shining green ; legs yellow ; cilia of tegula, and of 

 inferior orbit pale ; eyes of male broadly separated. 



$ . Face blackish ; with grey dust ; palpi brownish-yellow, 



