CARABIDAE. 



Tribe II.— ELAPHRIKI. 



In this tribe, as restricted by me, there are but two genera, both 

 of which are represented in ]S T orth America. Elaphrus having the 

 eyes large and prominent, and the elytra with rows of large, shal- 

 low, ocellate fovea?; Blethisa having the eyes small, the elytra with 

 nine dorsal stria?, with a few scattered fovea?. 



The head is pointed in front; the clypeal suture straight; the 

 antenna? filiform, with four glabrous joints; the mentum is deeply 

 emarginate, with a bifid tooth, gular suture distinct; the anterior 

 coxa? are entirely surrounded by the prosternum, which is not pro- 

 longed behind. The mesosternum is declivous; the side pieces are 

 diagonally divided, and the epirnera reach the coxa?; the episterna 

 of the metathorax are short and broad, without visible epimera. 

 The wings are well developed. The anterior tibia? are obliquely 

 sulcate at the apex internally, somewhat emarginate, with the inner 

 spur considerably above the apex; the anterior tarsi of the males 

 have three or four joints dilated, and covered with. hairs beneath, 

 and in Blethisa quadricollis the anterior thighs of the same sex 

 are armed beneath with an acute tooth. 



Species of both genera are found on both sides of the continent. 

 Elaphrus has considerable resemblance to Cicindela in form and 

 habits, and is found running on mud-flats near streams or pools. 

 Blethisa occurs also near water (usually marshes), under stones.. 



Tribe III.— LORICERIWI. 



This tribe contains two genera, of which but one is found in 

 North America, and its affinities are very differently represented 

 by authors. By most of them it is placed near Panaga?us, the 

 form of the anterior tibia?, which is altogether that of the ordinary 

 Carabida? of the second series, being considered to outweigh the 

 other characters. 



From all other Carabida? the species of the present tribe differ 

 in having the antenna? inserted so as to expose the globular base 

 of the first joint; the latter is very long; four joints are glabrous, 

 and the 2 — 6 are furnished with long diverging bristles ; the 

 mandibles are flattened ; the base of the maxilla? is very promi- 

 nent, and armed, as in Nebria, with long bristles; the palpi are 

 long and slender; the mentum is emarginate, with a bifid tooth 



