394 Mr. A. Murray's Monograph of the genus Catops. 



species ; it would, however, rather appear to bcloug to this 

 group. 



13. C. Dauricus, Motsch. 



Catops Dauricus, Motscli. Kemarques sur la Collection de Col. Russ. de 

 V. de Motschoulsky in Bnlletin de Moscou, vol. xviii. 1845. 



" Testacco-ferrugineus ; thorax angustior quam elytra. 



"A species remarkable on account of its thorax being much 

 narrower than the elytra, which are of a tolerably broad oval, 

 and acuminate at the extremity. The fades approaches nearly 

 the genus Pteruloma, but the body wholly removes it. It is of 

 a ferruginous-yellow colour, and is found on the summits of the 

 aljjs of Hamar-Daban in Mongolia*." 



I have not seen this species in nature, and the above descrip- 

 tion is too short to enable us to form an accurate idea of its 

 form or affinities. 



41. C. basilaris, Say. 



Catops basilaris, Say, Joum. Acad. Philadelphia, iii. 194. 



" Niger, brevissima flavescente pubescentia vestitus ; elytris 



brunncis, pallidioribus ad basin. 

 " Long. 1^ lin. 



" Body black, covered with numerous short yellowish hairs ; 

 eyes fuscous ; antennae blackish, two basal joints yellowish- 

 white ; eighth joint very small, transverse, shortest; the seventh 

 and three terminal joints largest, the latter somewhat piceous ; 

 thorax transverse, quadrate, convex, rather narrower before ; 

 lateral edge regularly arcuated, basal and anterior edge sub- 

 rectilinear ; angles rou)ided ; scutellum triangular ; elytra 

 brownish, ])aler at base ; a distinct subsutural impressed line ; 

 labrum and palpi pale piceous, beneath blackish piceous; feet 

 dark piceous. 



" Found under wood at Engineer Cantonment, on the Mis- 

 souri t-'' 



I believe it is not known what species Say had in view in 

 describing this. Dr. Leconte, whose knowledge of American 

 entomology is perhaps greater than that possessed by any other 

 naturalist, includes it, in his ' Synopsis of the Silphales of 

 America,' among those which were unknown to him. Say's 

 description, I think, seems to point either to an affinity with 

 C. tristis or C. fumatm, and I place it in this group with doubt. 



* MotschouUkv in loc. cit. t Sav in loc. cit. 



