468 Coleopterological Notices, IV. 



Beak separated from the head by an extremely feeble transverse impression, 

 which is foveate in the middle; scntellum small, rounded, emarginating 



the thoracic lobe ; body subglabrous and broadly oval Pacliybaris 



22 — Anterior coxas narrowly separated ; mandibles with the outer edge evenly 

 and feebly arcuate, not denticulate. 

 I'rothorax not tubulate at apex. 



Metasternum very short, the intermediate and posterior coxse separated 

 by a distance which is much less than the length of the post-coxal por- 

 tion of the first ventral segment Microcliollis 



Metasternum much longer ; body narrower, convex, oblong-oval, densely 



squamose, the scutellum conspicuously so IVicentrilS 



Prothorax strongly constricted behind the apex, the latter tubulate ; meta- 

 sternum long Ceiitriiiites 



Anterior coxse widely separated ; mandibles more or less dentate externally, 

 particularly near the base. 

 Pygidium oblique, completely concealed in both sexes, or with the mere 



apex exposed Calaiidriiius 



Pygidium fully exposed, unusually large, vertical, convex and very con- 

 spicuous in the male, but oblique and practically entiiely concealed in 



the female Centriiiogyna 



23 — Elytral sti'ije normal, always distinct, not foveate at base 24 



Elytral stripe almost completely obsolete, each terminating at base in a deep, 



posteriorly attenuate fovea 27 



24 — Third tarsal joint dilated and bilobed ; body without erect bristles 25 



Third tarsal joint slender, obconical, not in the least dilated ; body with erect 



bristles 26 



25 — Metasternum long, much more than one-half as long as the met-episterna; 

 prosternum with or without corniform processes in the male, widely or 

 narrowly separating the coxse, generally flat, but sometimes deeply ex- 

 cavated in the male, or otherwise modified I>illlilobaris 



Metasternum shorter, about one-half as long as the met-episterna ; body moi-e 



broadly oval and convex ; prosternum never armed in the male. 



Antennal club small or moderate ; prosternum flat or broadly impressed, 



sometimes more deeply excavated anteriorly ; vestiture very sparse but 



distinct. 



Prothorax broadly constricted anteriorly but not tubulate ; prosternum 



flat, not impressed, not excavated anteriorly but with a fine deep and 



even transverse constriction OligoloclillS 



Prothorax tubulate ; prosternum broadly impressed, deeply excavated 



anteriorly IdiostetllllS 



Antennal club very large, elongate ; j)rosternum narrowly and deeply sul- 

 cate along the middle ; body almost completely glabrous, polished, the 



setse extremely minute throughout Stetliobai'is 



26 — Body minute, the bristles very long and conspicuous ZaglyptllS 



2'y — Body oval, very convex, subglabrous, the prothorax very strongly tubu- 

 late Oomoi'phiditis 



