216 PROCEEDINGS OF THE NATIONAL MUSEUM vol. i04 



The only biological observations were made by Wallis (1929, pp. 

 123-124), and following are excerpts from his discussion: 



. . . falli inhabits somewhat richer land than those [species] taken by Mr. Sim. 

 Mr. Criddle finds them near his home at Aweme, Manitoba, along a road through 

 the aspen poplars, where the soil is a rich dark sandy loam. They appear never 

 to occur on the more sandy uplands a few yards away or on the bare sand which, 

 too, is quite close * * * burrows seem never to be more than a few inches deep. 

 Falli occasionally comes to Ught at Winnipeg, or rather flies around light, 

 rarely if ever coming dii^H^ to it, but circling it and faUing to the ground some 

 feet away. On one occasion when sugaring for moths in a rich wood, I noticed 

 a small area of the leaf humus undulating in a most vigorous and extraordinary 

 manner. On rolling the pieces of mould off like a blanket a seething mass of 

 Odontaeus was found beneath, rolling, crawling, clinging .... They . . . 

 appeared to have gathered for mating purposes, as many of the males had the 

 genitalia partly exposed. 



No other new facts on the biology of B. Jalli have been mentioned 

 since Wallis' interesting account. 



Specimens examined: 27 males, 22 females. 



CANADA 



MANITOBA: 11 males, 13 females. Av/eme, Foxwarren, Shell River, Winnipeg; 



(2) June, (18) July, (3) August. 

 ONTARIO: 2 males. Ottawa. 

 QUEBEC: Quinze Lake, Hsted by WalUs. 

 SASKATCHEWAN: Regina, listed by Wallis. 



UNITED STATES 



MICHIGAN: 11 males, 9 females. Cheboygan County, Douglas Lake, "Hrn. 



Mt. [ = Huron Mountain?] Club," Houghton County, Marquette, Onota (Alger 



County); (4) June, (12) July, (4) August. 

 SOUTH DAKOTA: 1 male. Volga. 

 WISCONSIN: 2 males. Vilas County, Wisconsin Trout Lake Nursery; (1) July. 



Bolboceras thoracicornis (Wallis) 



Odontaeus thoracicornis Wallis, 1928, p. 153. Type, male, Cincinnati, Ohio, 



Dury (Wallis). 

 Odontaeus cornigerus Blatchley (not Melsheimer), 1910, p. 938. 



Only one note was found concerning the biology of this species and 

 this was by Blatchley (1910, p. 938) under the name cornigerus. His 

 statement was: "One male from Vigo County, Sept. 28. Taken from 

 beneath a partly burned log in upland, sandy woods." 



From the information accumulated by dates of capture, the species 

 seems to be adult in the fall, winter, and spring. 



Specimens examined: 18 males, 7 females. 



ARKANSAS: 1 male. Camp Chaffee; (1) June. 



GEORGIA: 2 males. Atlanta, Clarke County; (1) March, (1) May. 



