PSILOPA. 141 



ones. Legs black, knees yellowish -red; middle band of the posterior 

 tarsi pale yellowish, having the last joint rather blackened. Poi- 

 sers whitish with darker petiole. Wings short and broad, clouded 

 with grayish ; the small transverse vein is below the tip of the first 

 longitudinal vein ; the posterior transverse vein rather distant from 

 the margin of the wing and rather oblique ; the two last segments 

 of the fourth longitudinal vein of equal length ; the second seg- 

 ment of the costal vein less than twice as long as the third ; the 

 transverse veins with broad brownish-black borders ; a spot of the 

 same color lies between the third and fourth longitudinal veins a 

 little before the posterior transverse vein ; a larger spot of the 

 same color lies before it on the costal margin, reaching to the third 

 longitudinal vein and being connected with an equally large, 

 blackish-brown spot on the apex of the wing, which almost attains 

 the fourth longitudinal vein. 

 Bab. Cuba. (Poey.) 



Gen. V. PSII.OPA Fall. 



The characters of the genus Psilopa are as follows. Second 

 joint of the antennas with a stout spine ; third oblong, the bristle 

 with long pectinations. Face on its upper part without any keel, 

 slightly convex everywhere, not wrinkled on its sides, receding to- 

 wards the opening of the mouth. Clypeus either quite concealed 

 or scarcely projecting beyond the oral margin. Middle tibias with- 

 out long bristles on their upper side. The costal vein thickened 

 and attaining the fourth longitudinal vein. 



This genus is represented in Europe by about twelve species 

 known with more or less certainty. Its representatives in North 

 America seem to be more numerous; a number of them are distin- 

 guished from the European ones by a more robust structure and a 

 more strikingly dusted appearance, and by their faces being not 

 exactly smooth and their cheeks descending a little deeper beneath 

 the eyes ; but neither the number of the species of this group 

 hitherto known is large enough, nor are the characters such as to 

 render a generic separation necessary. On the contrary, it will be 

 sufficient for the present, to put these species together as a sub- 

 division of the genus Psilopa. 



