COLEOPTERA OF NORTH AMERICA. 



Group III. — Euceeri. 



This group, so far as known to me, contains but a single species, 

 found in Louisiana, Eucccrus varicornis Lee, a small brown shin- 

 ing insect, of the form of Trechus, but with the elytra truncate, 

 and the outer joints of the antennae white. I formerly placed it in 

 Harpalini, but the anterior tibiae are slender, and not at all spinous. 

 It cannot be placed with the Lebiini, since the ligula is free at the 

 apex for a short distance. The pubescence of the antenna? extends 

 upon the third joint, and even the second is not entirely free from 

 it. The last joint of the palpi is oval and acuminate. The mentum 

 is not toothed. 



I have placed it in the present tribe for want of a more conve- 

 nient position. It is, however, an osculant form which is equally 

 out of place in any tribe here defined. The basal margin of the 

 elytra is more strongly defined than in any of the other genera 

 having truncate elytra. 



Tribe VII.— LEBIINI. 



The ligula in this tribe has the paraglossia connate to the apex, 

 and somewhat variable in form. The maxillary palpi are filiform, 

 the labial sometimes dilated. The antennas are filiform, with three 

 basal glabrous joints, except in Trechicus. The head is sometimes 

 constricted behind into a neck, but usually not; the anterior tibiae 

 are not thickened at the tip, and rarely have any spines at the apex. 

 The elytra are truncate at tip, and shorter than the abdomen ; 

 though in Tetragonoderus they are obliquely subsinuate, almost 

 as in certain Pterostichini ; the margin is not angulated at the hu- 

 meri, and the basal margin is sometimes wanting. The anterior tarsi 

 of the male are usually but slightly, rarely strongly dilated, with 

 squamiform papillae beneath. The ungues are frequently serrate. 



Two groups may be formed: — 



Labrum sbort, mandibles exposed. Lebi^. 



Labrum large, covering in great part the mandibles. Pekicalli. 



Group I. — Lebiae. 



The genera of this group form three sub-groups, according to 

 the form of the mentum and head. 



