444 COLEOPTERA OF NORTH AMERICA, 



Scrobes deep, M-ell defined, at least moderately arcuate, passing inte- 

 riorly ; 

 Scrobes strongly arcuate, passing beneath at a distance from the eyes. 



Dichoxenus. 

 Scrobes moderately arcuate, passing immediately beneath the eye. 



Anametis. 

 Scrobes evanescent posteriorly, badly defined, nearly straight, directed 

 toward the lower angle of the eye ; 

 Metasternal side pieces rather wide, suture distinct ; 

 Hind tibiae distinctly mucronate ; corbels cavernous. 



Melamomphiis. 

 Hind tibiae not mucronate ; corbels open. Dyslobus. 



Metasternal side pieces indistinct, suture obliterated ; 



Hind tibiae not mucronate ; corbels open. Panscopus. 



First suture of abdomen arcuate ; second segment as long as, and fre- 

 quently longer than the two following united ; 

 Seventh joint of funicle distant from the club ; third joint of tarsi broader 

 than the second, tarsi densely pubescent beneath ; 

 Hind tibiae not mucronate ; 



Scrobes strongly arcuate, moderately depp ; passing rapidly beneath 

 at a distance from the eyes ; 

 Support of deciduous piece of mandible not prominent ; 



Anterior tibiae denticulate within ; surface of body scaly without 

 hairs ; corbels of hind tibife open. Orimodema. 



Anterior tibiae not denticulate ; surface scaly and hairy ; corbels 

 subcavernous. Mimetes. 



Support of deciduous piece prominent ; anterior tibiae not denti- 

 culate ; surface scaly and with erect hairs ; 

 Corbels of hind tibiae cavernous ; humeri entirely obliterated. 



Diamimus. 

 Corbels of hind tibiae open ; humeri rectangular. 



Peritaxia. 

 Scrobes vei-y feebly arcuate, evanescent i>osteriorly, directed toward 

 the lower angle of the eye, and short. Thricomigus. 



Hind tibiae distinctly, usually rather strongly mucronate. Rostrum 

 longer and narrower than the head and more or less auriculate ; 

 Front convex, separated from tlie rostrum by a transverse impres- 

 sion ; side pieces of metasternum distinct, suture entire. 



Amnesia. 

 Front flat, rostrum continuous on the same plane and usually flat- 

 tened above ; side pieces of metasternum indistinct, sirture in 

 great part obliterated ; 

 Body above finely tuberculate, scales large. Phymatinus. 



Body not tuberculate, scales small and denser. Nocheles. 



Seventh joint of funicle contiguous to the club, third joint of tarsi feebly 

 emarginate, scarcely broader than the preceding ; tarsi sparsely setose 

 beneath. Cimbocera. 



