NORTH amkki(;an diptkka. 89 



legs entirely yellowish red. Both specimens have the exact golden 

 yellow spot on the fourth segment which Dr. Williston described for 

 *S'. slgnifera, except that the anterior dilatation is continued by a 

 shoi't median narrow line on the third segment, forming a cross- 

 shaped marking. A specimen from New York (Ithaca, June 2d, 

 Comstock) has the same spot, the femora black, except at ends, and 

 the antenni^e entirely flavous or testaceous. 



Bclvosia bicincta Rob. Desv. See Williston, Trans. Am. Ent. 8oc. xiii, 

 302-3. 



I believe, with Dr. Williston, that this is a good species. I can 

 further add the following distinctive characters between this species 

 and B. blfasclata. The facial ridges of bifasciata are provided with 

 strong bristles, which are lacking in bicincta, and the cheeks are more 

 hairy. The sides of the face are bare in both species, but the whole 

 anterior aspect of the head is altogether more bristly in bifasciata. 

 I have five specimens of bicincta fron) New Mexico, and only one of 

 bifasciata fi'om the same locality. In regard to the length of the 

 third antennal joint in bicincta, it is scarcely longer than the second 

 in my five specimens. There are distinguishing characters of ordi- 

 nary generic value separating these two forms — the great difference 

 in length of the antennal joints, and the ciliate or bare facial ridges 

 — and the two have for half a century been considered identical ! 



Three Belvosia from New York (Comstock) are all bifasciata; one 

 from Kingston, Jamaica (T. D. A. Cockerell), is bicincta. 



Blepharipeza adtista Lw. 



Two specimens from California (Coquillett). 



Blepharipeza leiieoplii'.vs Wd. 



Two specimens from Guanajuato, Mexico (A. Duges). The palpi 

 are black, rufous only on ti})s. 



Blepharipeza bieol<»r Mc(i. 



I identifv two s|)eciinens as tiiis species. One from Ithaca, N. Y., 

 June 1st (Comstock), the other from Pennsylvania (C. W. Johnson). 

 They fit Macquart's description well, except that the scutellum is 

 testaceous on apex. The abdomen is not so broad as in B. k'ncophrys, 

 and while both the above species have the antennie wholly black, 

 this species has the first two joints rufous. 



I have also two or three unnamed species of Blepharipeza, which 

 will be described in another pajicr, not including the following de- 

 scribed species. 



TRANS. AM. ENT. SOC. XIX. (12) APRIL, 1892. 



