322 Mr. F. P. Pascoe on the 



from the United States. According to their description of 

 the genus Centrinus, as applicable to tliose species, the ante- 

 rior coxae are " rather widely separated," the femora "un- 

 armed," and the tarsi '' with stout divergent claws." They 

 add, " In the males of several species the presternum [pectus] 

 just in front of the coxa3 is armed with a slender process, 

 which varies in length according to the individual, but not 

 according to the species." 



The table below is only intended to be suggestive of some 

 of the genera that will be necessary when the group is more 

 extensively examined. For the present it will be best to 

 continue the old name. The majority of the species are un- 

 known to me, and in the identification of those described in 

 Schonherr's great work much is lost by the neglect of the 

 characters afforded by the claws, the comparative length of 

 the funicular joints, and the underpart generally, while the 

 invariable reference to some other species for the size is very 

 trying. 



Claws free. 



Canal nearly obsolete or absent. 

 Anterior coxae separated. 



Prosternum lower than the coxae. 



Elytra broader than the pro- 

 thorax Centrmus. C. bicuspis, Germ. 



Elytra not broader than the pro- 

 thorax Gercetis. C, senilis, Gyll. 



Prosternum on a level with the 



00X30 , Sahnites. C. querulus, n. sp. 



Anterior coxae approximate Balbus. C. conicoUis, Boh. 



Canal distinct. 

 Scrobes lateral. 



Femora toothed Lydamis. C. angulus, Boh. 



Femora miitic. 



Canal prolonged between the 



anterior coxae Rhianus. C. mexicanus, Boh. 



Canal not prolonged between 



the anterior coxae Ortycus. C. perdix, n. sp, 



Scrobes oblique, united beneath . . Dimesus. C. geminiis, n. sp. 

 Scrobes oblique, running beneath 



but not united Opttatns. C. palmnris, n. sp. 



