INSECUTOR INSClTi;!!; MKNSTRUUS ' 25 



on external characters that the genus certainly belongs in the 

 Cuterebridse. 



Cuterebra cuniculi Clk. — I consider, with Brauer, that horri- 

 pilum Clk. must be a synonym of this species. C. abdominalis 

 Swenk is the same species. 



Cuterebra americana Kab. — There are several forms of this 

 species in the east and west. The mesoscutum may be quite 

 highly polished or with a very thin but distinct pruinosity, while 

 the pleural pile varies from whitish to distinctly yellow. I took 

 14 males of the pruinose form along the stream in Hell Can- 

 yon, Manzano Forest Reserve, New Alexico, at about 5,500 to 

 6,500 feet, September 14 and 17, 1916 ; and one male of the 

 polished form on the Rio Ruidoso, Lincoln Forest Reserve, 

 New Mexico, at about 7,000 feet, September 30, 1916. Many 

 specimens of the pruinose form were taken by me in July, 1898, 

 at the same point on the Rio Ruidoso, showing that both forms 

 occur together in the same district. Cuterebra nitida Coq. is 

 evidently a male of this species with an abnormally narrow 

 front, while latifrons Coq. is evidently one with an abnormally 

 wide front. C. polita Coq. is the same species, as is also the al- 

 lotype (male) of lepivora Coq. Of the above, polita is the form 

 with polished mesoscutum, while the others show some pruinos- 

 ity. Specimens from Virginia, South Carolina, and Georgia 

 show the mesoscutal pruinosity rather more distinctly and have 

 the yellowest pleural pile. 



Cuterebra approximata Wlk. — Two specimens from Yuma 

 and Phoenix, Arizona, are somewhat doubtfully referred to 

 this species. 



Cuterebra atrox Clk. — From the description, similis Johns, 

 is evidently this species. 



Cuterebra histrio Coq. — The holotype is from Guanajuato, 

 Mexico. Many specimens of a form of this species were taken 

 by myself in the Sierra Madre of western Chihuahua near 

 Meadow Valley, at about 7,000 feet. The facio-genal pattern 

 is intricate and peculiar. 



Bogeria princeps Aust. — C. lepusculi Towns, lepivora Coq. 

 (holotype, female), and albifrons Swenk are evidently this 



