AMERICAN COLEOPTERA. 131 



The four genera into which our species have been divided may be 

 retained as sub-generic divisions on the following basis : 



Anterior tarsi of male somewhat obliquely dilated Loxopeza. 



Anterior tarsi of male not obliquely dilated. 



Mentuni with a distinct tooth Lebia. 



Mentum not or merely obtusely toothed. 



Head not suddenly constricted behind the eyes Dianchomena. 



Head suddenly constricted Aphelogenia. 



These differences become so vague that it is not always easy to 

 determine with certainty the generic position of a species. 



COPTODERi Dej. 



In this genus the ligula proper is rather narrow, bisetose at tip, the 

 paraglossae membranous, wide, prolonged beyond the tip of the ligula, 

 their apices in contact or even overlapping. The mentum is broadly 

 and rather deeply emarginate without tooth. The terminal joints of the 

 palpi are somewhat fusiform. The labruin is large almost concealing the 

 mandibles. Antennas with the first three joints and the base of the 

 fourth glabrous. The head is not narrowed behind the eyes. Middle 

 of base of thorax very slightly lubed. Tibial spurs normal in length. 

 Tarsi slender, pubescent above, first joint as long as the next two, fourth 

 feebly emarginate. Ungues pectinate. 



One species occurs within our territory. 



C aerata r>ej. — Piceous, elytra bluish-green. Length .24-.26 inch ; 6-6.5 mm. 

 Male. — Anterior tarsi feebly dilated, first three joints biseriately squamulose. 

 Middle tibiae distinctly emarginate on the inner side near the tip, the tarsi 

 slender. Anal segment bisetose each side. 



Female. — Tarsi slender. Middle tibia not emarginate. Anal segment as in 

 the male. 



The tibial character above noted is usual in Lebia. The present is 

 the only other instance in which I have observed it. 

 Occurs in the Middle and Southern States. 



PHLIEOXENA Chaud. 



The characters are very nearly those of Coptodera. The ligula is 

 quadrisetose in front, the paraglossaa prolonged and slender at tip. 

 The genus does not seem composed of very homogeneous material as 

 one species is added for want of a better position and our own has no 

 mentum tooth as required by the diagnosis. Almost the entire fourth 

 antennal joint is glabrous. 



One species occurs in our fauna. 



P. signata Dej. {Coptodera). — Head piceous. Thorax testaceous with a 

 median piceous spot more or less defined. Elytra piceous with an undulating 

 fascia posteriorly, and an irregular dentate band more or less interrupted, broad 



