130 WILLIAM G. DIETZ, M.D. 



Sch. of Europe, a small insect, resembling in size S. seriatits Lee. ; 

 beak and antennae stout, the second joint of funicle not longer than 

 the third, prosternum canaliculate, claws ver}' small, connate nearly 

 to the apex. All the European species contained in my collection 

 agree in these characters, all the tibijB unguiculate at the apex and 

 the very small tarsal claws connate beyond the middle. 



In view of the striking differences in the structure of the claws, 

 I have divided our species into two subgenera, as follows: 



Tarsal claws very small, generally stout, not divergent (except tesselatus, ovipen- 

 nis aud impressirosttm), connate at least to the middle. 



Subgenus SMICEONYX. 



Tarsal claws moderate, e's.ceyit perfidus, generally slender and evidently, though 

 not strongly diverging, connate in their basal third only, rarely to the 

 middle Subgenus PSEUDEOMICEONYX. 



Subgenus SMICEONYX. 



The species comprising this subgenus are, on the whole, a little 

 more sombre colored than those of the next. The beak is stouter, 

 especially in the males ; tarsi stouter, fourth joint never twice the 

 length of the third. According to structural difference I have sub- 

 divided the species into the following groups : 



Form robust, strongly convex, elytra more or less distinctly ventricose, rounded 

 on the sides, widest about the middle, at most one half longer than wide. 



ovipennis Group. 

 Form more elongate, less convex, elytra elongate, straight on the sides, and more 

 than one-half longer than wide. 

 Prosternum short in frotit of the coxfe, generally transversely impressed, 



without antecoxal ridges profusus Group. 



Prosternum of moderate length in front of the coxje, sulcate, sulcus limited 

 by antecoxal ridges cinereus Group. 



ovipennis Group. 



The species comprising this group are strongly convex insects with 

 the elytra more or less ventricose or oval, widest about the middle. 

 The beak is longer than head and prothorax, generally robust in the 

 males, slender in the females. Antennae inserted two-fifths from the 

 apex in the males, at the middle in the females. The tarsi are stout 

 (except chierascens), third joint bilobed, fourth short, scarcely longer 

 than the former ; claws very small. 



In fijrm and in the insertion of the antennae, the species approach 

 closely to Pac hyj) hemes ; they are very closely allied, and rather 

 difficult to differentiate, aud were heretofore known in collections 



