20 COLEOPTERA OF NORTH AMERICA. 



Tribe V.— DRYPTINI. 



The ligula is here furnished with distinct paraglossre, more or 

 less free at the apex ; the antenna? are setaceous, filiform, or even 

 moniliform, the first joint as long as the three following, and the 

 basal joints are scarcely less hairy than the others. The anterior 

 tibiae are not dilated, and not spinous at the tip. The anterior 

 tarsi have three moderately dilated joints, with squamiforra papillae 

 beneath; the elytra are broadly truncate at tip, and shorter than 

 the abdomen. The head is constricted behind, forming a neck. 



The species are hairy and densely punctured insects, found under 

 bark and stones. Galerita, Thalpius, and Diaphorus are found on 

 both sides of the continent; Zuphium, thus far, only in the southern 

 province of the Atlantic district. The species of Galerita have red 

 thorax and blue or black elytra. 



Neck slender; 



Antenme setaceous. Galerita. . 



Antenme filiform. Zuphium. 

 Neck large. 



Antennae filiform; third joint shorter than the fourth; thorax truncate 



at base. Diaphorus. 



Antennce more or less moniliform ; joints 2 — 4 equal ; thorax subpedun- 



culate. Thalpius. 



This tribe commences a series so closely allied as to be with 

 difficulty defined. The essential characters of this tribe,- however, 

 are given above, and the combination of them will enable its mem- 

 bers to be recognized, although individually the same characters 

 reappear in other tribes. 



Tribe VI.— ODACAftTHIIVI. 



The ligula with distinct paraglossae, free at the apex; the an- 

 tenna? are filiform, sometimes with three basal joints nearly glabrous, 

 sometimes with only one; the first joint is more elongated than 

 usual, but less so than in the preceding tribe. The palpi are acute 

 at the apex. Head constricted behind into a neck, which, however, 

 disappears in some foreign genera. The anterior tibiae are not 

 thickened or spinous at the apex; the anterior tarsi of the male 

 are scarcely dilated. The elytra are truncate in some genera, 

 rounded and entire in others. According to the form of the head 



