AMERICAN COLEOPTERA. 85 



Mesosternum carinate; maxillary palpi filiform. 

 Epipleurae horizontal; elytra not extended. 



Mesosternum very feebly carinate; anterior tarsi % simple Cilea. 



Mesosternum with strong crest; anterior tarsi % dilated. 



Pliysetoporus. 



Epipleurre nearly vertical, elytra prolonged at the sides beyond tlie body. 



Mesosternum strongly carinate; anterior tarsi % simple. ..Ercliomus, 



Abdomen not margined; tibise fimbriate at tip with short, equal, closely placed 



spinules. 



Maxillary palpi subulate; body finely pubescent ConoNonia. 



CiLEA {Lrucopari/pJiits) is the only genus about which there is any 

 difficulty. The mesosternum is so feebly carinate that it might be 

 placed next to Tachinus, from which the simple tarsi of the male and 

 the longer first joint of the hind tarsus will distinguish it. 



BOLITOBII. 



Maxillary palpi filiform Rolifobiiis. 



Maxillary palpi with last joint conical, acute Itryoporii!^. 



Maxillary palpi subulate Itlycetoporus. 



The tibiae of Bolitohius are fimbriate with unequal spinules at tip, 

 Bryoporus the spinules are short, equal and closely placed, as far 

 as our species are concerned, while in Mycetoporus a portion of the 

 species have one structure while the rest have the other. 



HABROCERI. 



Two genera Hahrocerus and Trichojj/tyus, belong to this group, 

 the first only occurring in our fauna. The differences between the 

 two seem to be of extremely feeble importance, the elytra of the first 

 are longer than the breast while they are not longer in the second. 

 By this character alone Erichson and othei's really widely separate 

 these genera but by an ingenious arrangement of the synoptic table 

 they are made adjacent and again (in the body of the work) separated 

 by Tdchuius. 



The similarity of the hind coxae of Hahrocerus and Tanygnathus* 

 has already been mentioned. The latter genus was placed by Erichson 

 in the present tribe but has been removed to the sub-tribe Quediini 

 for very good reasons. 



HYPOCYPTUS Mann. 

 Antennae ten-jointed, first two joints robust, three to seven small 

 very gradually longer and broader, eight to ten forming a rather loose 

 elongate club, slightly compressed, each joint longer than that which 



*T. coi.LARis, Er. Gen. Staph, p. 289. — Specimens agreeing with the descrip- 

 tion of this species have been captured by Dr. E. A. Schwarz, in Florida. 



