BY THOMAS G. SLOANE. 493 



bent upon its author to define it, or at least to indicate some 

 character as diagnostic of it, also, to show its relationship to 

 other named groups of the tribe; these things I am not able to 

 do among the Lebiini. The subject is a most difficult one, as the 

 following quotations from Dr. Horn's work (Trans. Am. Ent. 8oc. 

 1881, ix.) will show : — "After having given the tribe a careful 

 study, having purposely left it for the final work in the present 

 paper, I have found myself with the same result as that arrived 

 at by Lacordaire and LeConte, namely, that it is not possible to 



divide the tribe in any satisfactory manner (p. 154) 



In concluding the Lebiini I regret to believe that the genera have 

 been inordinately multiplied, and the higher divisions whether 

 called groups, tribes, or subfamilies, have become so numerous and 

 are based on such shadowy characters as to envelop the subject in 

 an almost impenetrable cloud" (p. 159). 



Table of Genera known to me. 



I. Fourth joint of tarsi bilobed. 



A. Auteunce inserted considerably in front of eyes. 



b. Tarsi setose on upper surface Xanthophcea. 



bb. Tarsi glabrous on upper surface Trigonothops. 



AA. AntenuEe inserted near eyes. 



C. Mentum edentate Phlceodromius. 



CO. Meutum dentate \Sarothrocrepis. 



I hctroma. 



II. Fourth joint of tarsi entire. 



D. Mentum supported at base by a raised subnien- 

 tum. 

 E. Mandibles with scrobes externally, neck not 

 condyliform. 

 F. Head not convex between eyes, postocular 

 prominences not large. 

 G. Mesosternum narrow and abrupt between 

 intermediate coxse. 

 H. Head constricted and transversely impressed 

 behind eyes, so as to form a distinct neck, 

 tarsi glabrous on upper surface (interstices 

 of elytra laBvigate). 

 i. Ungues serrate 



