254 Annals Entomological Society of America [Vol. XV, 



fringe of black spines. The veins are all more or less clouded, more 

 marked anteriorly; stigma brownish yellow. 



Female Facial tubercle practically wanting; front reddish., a 

 little shining, a shallow median groove extending between the ocelli 

 and antennal prominence; indistinctly finely wrinkled, especially above; 

 thorax lighter colored; abdomen more yellowish red, the darker areas 

 more restricted and more ferruginous; legs paler. Pigment of the 

 wings more blackish, and a little more extensive anteriorly. Possibly 

 there is as much variation as in the male. 



This description is drawn from 9 males and 1 female taken 

 by myself at Orillia, May 18th to 30th. The species has been 

 reported from Manitoba, B. C, Washington, and other places 

 and is probably to be found over the whole of Canada and the 

 northern States. 



I do not think that H. ferruginea can be classed as a rare 

 species, but it is most certainly not common in collections. 

 This is, I think, due to the fact that its habits are not well 

 understood. While it is true that it occurs in company with 

 Brachyopa spp., it seems to have slightly different habits 

 generally. I have found it more often on very low blooms of 

 choke cherry, that is about two or three feet from the ground, 

 but I took one specimen on bloom about eight feet up, and 

 another specimen was taken on bloom in open sub-swampy 

 woods. Another peculiarity is that I have never seen the 

 species flying before four o'clock in the afternoon, but this may 

 be due to the fact that my collecting in May was practically 

 all done after two-thirty p. m. 



Since the above paper was prepared several additional spec- 

 imens belonging to these two genera have been examined, 

 including two additional new species. 



Brachyopa cynops Snow. 

 I have examined the type of this species, and find it to be 

 a female. The description covers all the essential points. The 

 dorsum of the thorax is rusty yellow rather dull, the disc, occu- 

 pying about half the width of the dorsum, black; the pollen is 

 greyish yellow, not grey and the shining stripes are not distinct. 



Brachyopa vacua O. S. 

 About thirty specimens from Kansas and Missouri show no 

 differences from the description. 



