236 ACADEMY OF NATURAL SCIENCES 



little larger, but hardly longer ; tenth transversely oval, double 

 the size of the preceding one ; eleventh still wider, and nearly 

 double the length of the two preceding ones conjunctly: maxil- 

 lary palpi unarmed ; terminal joint conic-securiform: thorax nar- 

 rowed behind, not closely applied to the elytra; with a longitudi- 

 nal, impressed line ; sides not angulated in the middle, but in- 

 dented ou the margin : elytra half the length of the abdomen ; 

 humeral tubercle oblong : anterior tibia rectilinear : tergum con- 

 vex, simple. 



Length more than one-twentieth of an inch. 



A little smaller than the preceding. It probably belongs to the 

 genus Br y ax is of Leach. 



[Belongs to Batrims. — Lec] [99] 



3. P. dentatus. — Elytra nearly rectilinearly truncated, half 

 the length of the tergum j tergum simple ; anterior tibia arcu- 

 ated. 



Inhabits the United States. 



Head blackish ; a small indentation above each antenna : an- 

 tennae rufous ; joints, from the third to the eighth, inclusive, sub- 

 equal ; ninth a little larger, but hardly longer ; tenth transverse, 

 double the size of the preceding one ; eleventh oval, wider than 

 the tenth, and as long as the 8th, 9th and 10th conjunctly : thorax 

 nearly orbicular, slightly prominent on the sides, blackish ; an 

 oval indentation at base, and an orbicular one each side : elytra 

 reddish-brown, nearly half the length of the abdomen ; humeral 

 tubercle oblong ; an impressed line on each elytron obsolete be- 

 hind : tergum convex, simple, blackish : anterior tibia a little ar- 

 cuated. 



Length one-twentieth of an inch. 



Var. a. Reddish-brown. 



Smaller than either of the preceding species. 



[A Bri/a.cis. — Lec] 



[Vol. IV. 



