8 C0LE0PTERA OF NORTH AMERICA. 



and distinct gular suture. The head is strongly constricted be- 

 hind the eyes into a neck; the clypeal suture is transverse. The 

 anterior coxae are entirely enclosed, and the presternum is not pro- 

 longed behind; the mesosternum is declivous, the side pieces are 

 diagonally divided, and the epimera reach the coxae; the episterna 

 of the inetathorax are moderately broad; their epimera are visible 

 in the Maderan genus Elliptosoma, but are not seen in Loricera. 

 The elytra have fourteen stria?, and a few impressed fovea?. The 

 anterior tibiae are very slightly thickened, deeply sulcate and emar- 

 ginate internally, with the inner spur far above the apex. Three 

 joints of the anterior tarsi of the males are dilated, covered with a 

 brush of hairs beneath. 



Several species are found near the Pacific coast; one also occurs 

 in Nova Scotia and at Lake Superior, which does not appear to 

 differ from the European L. pilicomis. 



Tribe IV.— TRACHYPACHItfl. 



This tribe is represented by two genera. Trachypachys, of which 

 one species is found in Northern Europe, and another on the Pacific 

 coast, north of Columbia River, and Sistolosoma, found in Chile. 



It differs from all other Carabidae by having the posterior coxae, 

 though not unusual in size, extended to the margin of the body, 

 so as to separate the side pieces of the inetathorax from the first 

 ventral segment. The form of body is that of a small Harpalide. 

 The head is rather blunt, the eyes not prominent, the clypeal suture 

 transverse; the antennae are shining and glabrous, having only a 

 few hairs about the sides of the outer joints. The palpi are fili- 

 form; the mentum deeply emarginate, with bifid tooth and gular 

 suture distinct; the anterior coxae are not closed behind; the pro- 

 sternum is produced behind the coxa?, and passes over the meso- 

 sternum ; the sutures between the epimera and the prosternum are 

 not visible; the mesosternum is declivous, not carinate in front, 

 though, by an error of observation, I have stated in the Pacific 

 Railroad Reports and Explorations, vol. XL, that it is formed as 

 in Notiophilus ; the side-pieces are diagonally divided, and the 

 epimera reach the coxae ; the episterna of the metathorax are long 

 and narrow, without visible epimera. Elytra with stria? composed 

 of small punctures, visible only near the suture. The anterior 

 tibia? thickened gradually, and armed with short spines externally, 

 obliquely sulcate and slightly emarginate internally at the apex, 



