THE CANADIAN ENTOMOLOGIST. 285 



or less blackish, the knees yellow, pile yellow ; wings with a brown cloud ; 

 abdomen brown, shining, with thin fuscous pile, the pile on the sides, 

 middle and apical margins longer, yellowish, less erect. Length, 14 mm. 



g . — Eyes separated, pile and pollen of face more whitish, anterior 

 and middle femora darker, abdomen inclining to ferruginous, hind femur 

 beneath presenting a dentiform angle bearing a tuft of black pile, sides of 

 second segment presenting a depression which shows a purplish reflection. 

 Length, 12-13 mm. 



Carlinville, Illinois ; one 9 , two <$ specimens. 



Temnostoma trifasciata, n. sp. 



This species closely resembles T. bombylans, but the wings are brown 

 before, that colour not extending behind the fourth longitudinal vein; the 

 abdomen of female has only three fasciae. 



Carlinville, Illinois ; three $ , two $ specimens. 



Phorantha purpurascens, Twns. 



Hyalomyia purpurascens, Townshend. Proc. Ent. Soc, Wash. 2 : 

 137, 1 89 1. This species was described from four males and four females 

 from my collection. It is more common in my neighbourhood than all of 

 the other species of Phorantha and Alophora together. I know the 

 species very well. I still have eighteen specimens from the set from 

 which the types were described. Altogether I have forty males of this 

 species and they all have the calypteres brown. On the other hand, 

 twenty-one females have the calypteres whitish. 



From the material afforded in my neighbourhood, I think that 

 Coquillett's P. occidentis contains the females of at least three distinct 

 species. Assuming that Walker's type was a female and that it was the 

 commonest species, P. purpurascens may be a synonym. I do not believe 

 that, without comparing the type, it can be shown that Walker's species 

 was the same as P. purpurascens, or even that it was a Phorantha. 



Hyalotnyia Robertsonii, Twns., was also founded on specimens from 

 my collection. I do not know what it is, but the specimens were larger 

 than those of P. purpurascens, and all of the specimens I have that were 

 referred by me to this species belong to Alophora. I think they are 

 females of A. ceneoventris. 



Phorantha pruinosa, n. sp. 



$ . — Closely resembles the male of P. purpurascens, but the abdomen 



