NORTH AMERICAN GEOTRUPINAE — HOWDEN 195 



Brady cinetulus rex Cartwright 



Bradycinetulvs rex Cartwright, 1953, p. 103. Type, male, Sarita, Tex., collected 

 on bare sand Nov. 30, 1911 (USNM). 



Only three specimens of this species are known, the type and two 

 male paratypes. All were collected in Texas, the two paratypes 

 coming from Corpus Christi, June 28, 1942, and Kingsville. 



Genus Bolborhombus Cartwright 



Bolborhombus Cartwright, 1953, p. IIG. 



Genotype: Bradycinetus carinatus Schaeffer (Bolboceras schaefferi 

 Boucomont), designated by Cartwright (1953, p. 117). 



Generic Limitations: Given by Cartwright (1953, pp. 116-117): 



Mandibles arcuate externally. Head, male and female, without median frontal 

 horn. Pronotum serrate laterally; apex with a carina paralleling anterior margin, 

 the interspace interrupted behind each eye by a distinct rather deep foveola; 

 base margined. Scutellum triangular with base straight, sides arcuate. Elytra 

 not margined at base; seven discal striae, the first two interrupted by the scutellum, 

 the second sometimes indistinctly forked opposite the apex of scutellum. Two 

 prosternal spines in tandem behind anterior coxae, the posterior more or less 

 hastate. Metasternal plate rhomboid in shape, the posterior angle acute with 

 adjacent edges cariniform, the lateral angles with adjacent edges rounded; the 

 intercoxal lobe deeply concave with strong cariniform lateral edges. 



For adult descriptions, keys, and locahty records the reader should 

 consult Cartwright's revision. None of the species in this genus have 

 been collected in numbers and nothing has been written concerning 

 their biology. 



Bolborhombus carinatus (Schaeflfer), new combination 



Bradycinetus carinatus Schaefifer, 1906, p. 251. Type, male, Palmerlee, Cochise 



County, Ariz. (USNM). 

 Bolboceras schaefferi Boucomont, 1911, p. 347. 

 Bolborhombus schaefferi (Boucomont) Cartwright, 1953, p. 119. 



This species was originally described in the genus Bradycinetus 

 by Schaeffer (1906, p. 251). The same year Cockerell (1906, p. 242) 

 stated that the name Bradycinetus was preoccupied and changed it to 

 Brady cinetulus. Then Boucomont (1911, p. 347) decided that Brady- 

 cinetus (or Bradycinetulus) was merely a synonym of Bolboceras. As 

 the name carinatus had previously been used by Blackburn in 1904 

 to describe an Australian species of Bolboceras, Boucomont stated 

 that carinatus Schaeffer was a homonym and proposed the name 

 schaefferi to replace it. 



Since then Cartwright (1953, p. 101) and I have concluded that 

 Boucomont's apphcation of the name Bolboceras was in eiTor (Bol- 

 boceras being the correct name for the genus sometimes known as 

 Odontaeus for reasons given in the section on Bolboceras). Because 



