2 GO DIPTERA OF NORTH AMERICA. fpART II. 



arista, the bristles upon the thorax and upon the scutellum are 

 also distinctly shorter, those before the hiud margin of the seg- 

 ments of the abdomen much shorter than in the male. Transverse 

 bands at the basis of the segments of the abdomen are present, 

 but very narrow. Fore coxae yellow, with a whitish pubescence 

 and a few black bristles. Middle and hind coxae black or black- 

 ish-brown. Femora yellow, the extreme tip of the hind femora 

 dark -brown, the under side of all beset with very short minute 

 whitish hairs ; on the hind side of the fore femora there are only 

 a few minute black hairs near the tip, but no bristles. Tibia? 

 yellow, the extreme basis and the apical half of the hind ones 

 brown ; the fore tibia; near the basis with a small minute bristle 

 upon the upper side and, farther towards the middle, with two such 

 bristles upon the hind side. The middle tibia? have, besides the 

 bristles at the tip, a few more bristles, which are longer than In 

 the male. Hind tibia? upon the outside with two, at the utmost 

 with three, quite short black bristles. Fore tarsi about once and 

 a half the length of the tibia?, dark-brown ; the first joint as long 

 as the four following taken together, upon the hind side with three 

 hardly perceptible, short bristles. Middle tarsi blackish-brown, 

 only brownish-yellow at the basis, distinctly longer than the tibia? ; 

 their first joint over 1^ the length of the following taken together, 

 which are of a decreasing length. Hind tarsi blackish-brown, 

 otherwise as in the male. Wings exactly as in the male. 



Hob. Cuba. (Riehl.) 



Observation 1. Brazilian specimens of P. jucundus are to be 

 found in Winthem's and Wiedemann's collections. 



Observation 2. I hope not to have been ' mistaken in the 

 specific identity of both sexes, although the bristles of the tibiae in 

 the 9 do not correspond exactly to those in the < , as is usually 

 the case. The great resemblance in the neuration and the picture 

 of the wings seems to warrant the specific identity. Should I be 

 mistaken I beg to take the J* for the type of the species. 



B. Wings without dark picture. 

 A. First longitudinal vein extending Jar beyond the middle of the wing. 



8. P. ciliatiis LOEW. . Chalybeus, nitidissimus, alis immaculatis, 



vena longitudinal! prima elongata et costa pilis subtilissimis ciliata, 

 pedibus nigris, tarsorum anticorum articulo primo nigro-setoso, articulo 

 secundo perbrevi. 



