14 Psyche [March 
Holotype cf Albuquerque, N. Mexico. Aug. 3, 1925. In 
Coll. S. W. Bromley. 
I have never seen a specimen of the true P. rufiventris Macq. 
from the United States. The species was originally described 
from San Domingo, but the description is very meagre and might 
very well apply to Williston’s rufus. I have seen, however, 
specimens of what I take to be rufiventris from Haiti, the Domi- 
nican Republic, Cuba, and the Bahamas, and it is quite different 
from any species I have seen from the United States, being more 
closely related to P. fulviventris Macq. from Florida than to P. 
rufus. The principal points of difference distinguishing it from 
the latter are the yellow hairs on the scutellum (in rufus they are 
black), the thick yellow pile along the sides of the abdomen near 
its base, the general golden color of the thoracic vestiture, and 
the smaller average size. The black markings on the thorax 
are also very decided, contrasting with the general reddish color 
of the thorax. Fulviventris Macq. has the femora black. In the 
present species they are red. 
Macquart’s name rufiventris, however, can not stand, as the 
same species was, beyond the slightest doubt, described from 
San Domingo by Olivier in 1789 (Encyclop. Methodique IV, 
263.4) as Asilus vittatus. Macquart’s description of rufiventris 
in Dipteres Exotiques (I, 2, 123), appeared in 1838. E. Lynch — 
Arribalzaga described a species of Proctacanthus from Misiones, 
giving it the name of vittatus in 1880, (Annal. Soc. Cient. Argent., 
IX. 261. 29), but I have not seen the description of this species. 
In recapitulation, therefore, we have the following estab- 
lished species and synonymy. 
1. Proctacanthus vittatus Olivier. 
Syn: Proctacanthus rufiventris Macquart. 
2. Proctacanthus rufus Williston. 
Syn: Proctacanthus rufiventris Hine. 
3. Proctacanthus hine; new species. 
Syn: Proctacanthus rufus Hine. 
In studying a number of Asilidse from the Cornell Univer- 
sity collection, kindly loaned me through the good offices of Drs. 
Johannsen and Bradley, I came across an interesting new species 
of Proctacanthus from Southern Georgia, related to P. brevipennis 
