508 TERTIARY INSECTS OF NORTH AMERICA. 



of the genus in the great brevity of the antennse and of their separate joints, 

 as well as, so far as can be seen, in the shortness and stoutness of the legs. 



QUEDIUS CIIAMBERLINI. 

 PI. 10, Fig. 8. 



Head moderately large, ovate, with a slightly constricted neck. 

 Antennic considerably longer than the head, reaching about to the middle 

 of the thorax, the third joint a little longer than the second, scarcely 

 increasing in breadth apically, the last joint no broader than the penulti- 

 mate and scarcely, if at all, longer than broad. Prothorax fully as long as 

 the head and narrower than long, subequal, smooth, and black. Legs 

 shorter and stouter than in our smaller species of Quedius, but otlierwise 

 similar. Elytra longer than the prothorax, of the same color and densely, 

 finely, and briefly pilose. Abdomen black, narrowing posteriorly, the part 

 beyond the elytra longer than the rest of the body. 



Although longer than in the other species of Quedius here described, 

 the antennse are still markedly shorter than in our living forms. 



Length, 7.25°"" ; breadth, 1.5""". 



The species was described from other specimens than the one figured. 

 It is named for the distinguished geologist. President Chamberlin, of the 

 University of Wisconsin. 



Florissant. Four specimens, Nos. 1478, 6615 and 7083, 10627, 12057 

 and 12483. 



Quedius breweri. 



PI. IG, Fig. 4. 



Head large, ovate, apparently smooth, with distant punctures, the 

 neck slightly constricted ; mandibles stout and not very long ; antennse but 

 little longer than the head, increasing very slightly in size aj^ically, the 

 third joint a little shorter than the second, the last subpyriform, a little 

 longer tlian broad, while the penultimate is broader than long. Prothorax 

 smooth like the head, not at all explanate, apparently of about equal length 

 and breadth, narrowing a little anteriorly, furnished with a few distant, 

 scattered, erect bristles. Legs apparently much as in Q. molochinus 

 (Grav.), to wliich it appeai-s to be most nearly allied, though a slenderer 

 insect. Elytra rather shorter and scarcely broader than the prothorax, 



