Occasional Papers of the Aliiscitm of Zoology 3 



is an important enemy of the various insects upon which it 

 preys. 



Microstylum galactodcs Loew. — This species is somewhat 

 smaller than the preceding, with the abdomen black and the 

 wdngs white. The type locality is Pecos River, Texas ; it has 

 also been taken in several places in Kansas. 



Saropogon dispar Coquillett. — Three specimens. This species 

 closely resembles some members of the genus Deromyia, but 

 the fourth posterior cell is open and each antenna has a short 

 style. Length about 30 millimeters. 



Deromyia ternata Loew. — Three specimens. The fourth 

 posterior cell is closed and petiolate; thorax with prominent 

 black stripes separated by gray stripes and abbreviated an- 

 teriorly. The specimens are larger than usual, having a total 

 length of 26 to 28 millimeters. 



Proctacafithus aruo Townsend. — One female specimen ap- 

 pears to be of this species, but the specimen is teneral and 

 therefore not fully colored. 



Brax anonialus Bellardi. — One male and three females. All 

 have three submarginal cells and clearly belong to this species. 

 Brax argyrosoma Hine. — The species of Erax that belong 

 to the group in which the male has long white hair on some 

 of the abdominal segments parted in the middle and directed 

 outward are common in arid regions. This species is repre- 

 sented by numerous specimens of both sexes. The wing has 

 only two submarginal cells, of which the second is much more 

 than half the length of the first. 



Brax albibarbis Macquart. — Numerous specimens of both 

 sexes. Considered in the light of recent synonomy, this is the 

 most abundant and widely distributed species of Erax in this 

 country, for its range is from the x'Vtlantic to the Pacific and 



