NORTH AMERICAN GEOTRUPINAE — HOWDEN 191 



Genus Bradycinetulus Cockerell 



Bradycinetulus Cockerell, 1906, p. 242.— Cartwright, 1953, p. 101. 

 Bolboceras Kirby (in part), 1818, p. 459. 

 Amechanus Horn, 1870, p. 48. 

 Bradycinetus Horn, 1871, p. 334. 

 Bradycellus Schaeffer, 1906, p. 249. 



Genotype: Bradycinetulus Jerrugineus (Palisot de Beauvois), des- 

 ignation by Cartwright (1953, p. 101). 



Generic limitations: Given by Horn (1870, p. 48; Cockerell 

 merely gave Bradycinetulus as a new name for Horn's Bradycinetus) 

 under the name Amechanus: 



. . . the scutcllum being broad, triangular with the sides rounded, and not 

 depressed below the level of the elytra. The very narrow linear and depressed 

 scutellum is seen only in Athyreus and Stenaspidius in the group Geotrupinae, 

 while the form of the scutellum of our species is very similar to that seen in the 

 Geotrupes or Bolboceras. 



Additional characteristics given by Cartwright (1953, p. 101) are: 



. . , the mandibles are evenly arcuate externally, the median prominence of 

 the pronotum is developed into a pair of horns in the male, the scutellum is 

 wider than long and distinctly punctate with fine to moderate punctures, ana the 

 posterior vertical face of the prosternal intercoxal piece is wide and flat with the 

 ventral edge evenly arcuate or slightly angulate at middle. The three species 

 placed here are all of large size, 17 to 21 mm. in length by 10 to 12 mm. in width. 



Because of Cartwright's recent and very adequate revision of the 

 genus, no comments on synonymy or adult morphology are needed 

 here. A brief review of the pertinent Uterature is given, along with 

 any available information on the biology of the species. For keys 

 to the species and locality records the reader should consult Cart- 

 wright's revision. Also included in Cartwright's paper were dis- 

 tributional data that the present writer had accumulated. 



Bradycinetulus fossatus (Haldeman) 



Bolboceras fossatus Haldeman, 1853, p. 362 (type, Texas, LeConte collection 



at MCZ).— Boucomont, 1911, p. 241. 

 Amechanus fossatus (Haldeman) Horn, 1870, p. 48. 

 Bradycinetus fossatus (Haldeman) Schaeffer, 1906, p. 250. 

 Bradycinetulus fossator (Haldeman) Cockerell, 1906, p. 242. — Cartwright, 1953, 



p. 103. 



The midwestern species fossatus appears to have habits similar 

 to its eastern counterpart, jerrugineus. Bradycinetulus jossatus has 

 been recorded from sandy localities from Nebraska to Texas. Speci- 

 mens have been collected in every month from May through August, 

 most commonly in June. 



In Noble and Payne Counties, Okla., Brown (1927, p. 27) found 

 it commonly from May to July in vertical burrows from 6 to 14 inches 



