250 AMERICAN COLEOPTERA. 



which, together with the entirely divided eyes, to which Linell* has 

 already called attention, necessitates the erection of a new genus. 



The intermediate intercoxal process is in all our species broader 

 behind the coxse, slightly elevated and generally distinctly limited 

 on each side, free from any hairs and very plainly visible. 



For completeness I have given in the following table all the 

 genera of the Geotrupini, which occur in our fauna, and also have 

 included for comparison the genus Athyreus, which does not occur 

 in the United States : 



TABLE OF THE GENERA OF GEOTEUPINI. 



1. Club of antennre lenticular '2. 



Club of autennse lamellate Geotrupes. 



2. Middle coxse very widely separated, the process separating the coxse as broad 



as long and of nearly equal width Athyreus. 



Middle coxse narrowly separated, the process longer than broad and always 

 narrower between than behind the coxse 3. 



3. The intermediate intercoxal process between the coxse less than one-fourth 



the process in its widest part behind the coxse 4. 



The intermediate intercoxal process between the coxae one-fourth or more as 

 wide as the process in its widest part behind the coxse. 



Brady cinet US. 



4. Eyes partially divided Bolboceras. 



Eyes entirely divided 5. 



5. Intermediate intercoxal process between the coxae with a vertical tooth-like 



elevation Bolbocerosoma. 



Intercoxal process without tooth-like elevation between the coxae. 



Odontseus. 



BRADYCIBfETUS Horn. 



Judging from the published accounts the more widely separated 

 middle coxse seems to be the only character distinguishing this genus 

 from Bolhoceras. 



Excluding minor Linell and hornii Rivers, which are placed in 

 Bolhoceras for reasons given under that genus, our five species can 

 be distinguished by the following table : 



TABLE OF THE SPECIES OF BRADYCINETUS Horn. 



1. Apex of middle and hind tibise when viewed from the outer side deeply emar- 



ginate 2. 



Apex of middle and hind tibise truncate 3. 



2. Shining, side margin of thorax distinctly serrate (ossatllS Hald. 



Dull, side margin of thorax entire lerrugineus Beauv. 



Proc. U. S. Nat. Mus., vol. xviii, p. 723. 



