NORTH AMERICAN GEOTRUPINAE — ^HOWDEN 197 



sional specimen examined by me bore the label "in burrow." Other 

 than this, nothing has been recorded about the habits of these species. 



Bolbocerastes regalis Cartwright 



Bolbocerastes regalis Cartwright, 1953, p. 106. Type, male, "3206. Colo. R. 

 bottom. Monument 204, Mex. Bd. line, Mar. 20-31, '94 U. S. N. M. Ace. 

 No. 28133, Dr. E. A. Mearns." (USNM.) The above locality, according 

 to Cartwright, is about 20 miles south of Yuma, Ariz. 



This rather striking species was described by Cartwright from 97 

 specimens from Arizona, California, Nevada, and Mexico. The 

 species has been collected in every month from March through 

 September, being more frequently seen in the spring. 



Previously, the species had been confused with serratus (LeConte) 

 and many records of serratus from California and Arizona probably 

 refer to this species or to imperialis Cartwright. 



Bolbocerastes imperialis Cartwright 



Bolbocerastes imperialis Cartwright, 1953, p. 109. Type, male, Imperial County, 

 Calif., on the experiment farm, June 1912, Bridwell (USNM). 



This species, which is very similar to Bolbocerastes serratus (Le- 

 Conte), was described from 212 specimens collected in Arizona, 

 California, New Mexico, western Texas, and Mexico. They were 

 found in every month from May through November, but have been 

 most commonly collected in the summer and fall. 



Bolbocerastes imperialis kansanus Cartwright 



Bolbocerastes imperialis kansanus Cartwright, 1953, p. 112. Type, male, Rush 

 County, Kans, (CC). 



Only seven specimens of this species are known. They were all 

 collected in Rush and Ness Counties, Kans., during July and August. 



Bolbocerastes serratus (LeConte) 



Aihyreus serratus LeConte, 1854, p. 80 (type, LeConte collection, MCZ). — 



Boucomont, 1902, p. 8. 

 Amechanus serratus (LeConte) Horn, 1870, p. 48. 



Bradycinetus serratus (LeConte) Horn, 1894, p. 334. — Schaeffer, 1906, p. 251. 

 Bradycinetulus serratus (LeConte) Cockerell, 1906, p. 242. 

 Bolboceras serratus (LeConte) Boucomont, 1911, p. 341. 

 Bolbocerastes serratus (LeConte) Cartwright, 1953, p. 113. 



This species ranges from Kansas through Oklahoma and Texas to 

 Mexico. It has been frequently taken in Texas from April through 

 September. ^4 Specimens have been collected at light, but other than 

 that nothing has been written concerning its habits. 



