92 COLEOPTERA OF NORTH AMERICA. 



Tribe V.-CERTLINI. 



Small, oblong or oval, flattened insects, having all the coxae 

 widely separated, the first ventral segment elongated, and the last 

 joint of the palpi small and acicular, the penultimate thick; lobes 

 of the maxillae long and slender. 



Antennae 11-jointed ; (body pubescent). Philothermus. 



Antennas 10-jointed; (body glabrous). Cerylon. 



Fam. XIX.— EHYSSODIDAE. 



Mentum very large, quadrate, bisinuate in front, covering 

 entirely the mouth beneath; palpi short, 3-jointed. 



Maxillae with two small lobes; palpi short, 4-jointed. 



Antennae inserted under the frontal margin, 11-jointed, 

 joints nearly equal, rounded, the first larger, but also rounded. 



Prothorax beneath with the side pieces distinct, the suture 

 running parallel with the lateral margin ; coxal cavities 

 closed behind, widely separated. 



Mesosternum very short, side pieces diagonally divided, 

 epimera reaching the coxae. 



Metasternum very large; side pieces very narrow, almost 

 concealed by the elytra. 



Elytra rounded at tip, covering the abdomen, with six or 

 seven deep furrows, or rows of punctures ; scutellum wanting. 



Abdomen with six ventral segments; the first visible only 

 between the coxae, broadly triangular; the three anterior 

 ones closely connate. 



Anterior coxae small, globular, not prominent; middle 

 coxae globular, small; posterior coxae small, subtriangular, 

 prominent internally, all of them widely separated. 



Legs short; anterior tibiae somewhat dilated, terminated 

 by two hooks, on the under surface sulcate towards the tip, 

 subemarginate, and armed above the tip with a spine; middle 

 and posterior tibiae with an internal terminal spine, spurs 

 distinct; tarsi 5-jointed, very slightly pubescent beneath; 

 posterior trochanters prominent, oval. 



Two genera, of singular form, found under bark, constitute this 

 family, which in several of its characters resembles the Carabidoe, 

 but yet not so as to belong to the same, series. The antennae are 



