AMERICAN ENTOMOLOGY. 05 



lines on each elytron, the interior line confluent with the suture 

 near the tip : edge all round, black : beneath rufous. 



Obs. The similarity of this species with the preceding, is ob- 

 vious, and even striking; but it is specifically distinguished by the 

 existence of two black lines on the elytra, in place of the exte- 

 rior one of that insect. I obtained several specimens near the 

 Rocky Mountains, when with Major Long's party in that region, 

 but it does not appear to be an inhabitant of the Atlantic States. 



The upper left figure. 



Cryptocephalus bivittatus. — Specific character. Yellow- 

 ish-rufous, punctured ; elytra yellow, with two vitta, and sutural 

 edge black. 



Cryptocephalus bivittatus nobis, Journ. Acad. Nat. Sciences, 

 vol. iii. p. 440. 



Desc. Body yellowish-rufous, punctured : orbits yellow : front 

 with a longitudinal indented line : thorax with dense impressed 

 punctures; lateral margin and an abbreviated obsolete dorsal line 

 originating at the anterior edge, more distinctly yellow : scutel 

 black : elytra irregularly and densely punctured, one or two 

 regular series of punctures on the exterior margin; color yellow; 

 each elytrum with a broad black vitta originating midway be- 

 tween the humerus and scutel, and not reaching the tip ; another 

 vitta, less dilated than the preceding, takes its rise at the hume- 

 rus, and terminates a little beyond the tip of the preceding vitta; 

 it is generally interrupted into two or three spots : beneath very 

 pale rufous : postpectus varied with dusky. 



Obs. I obtained this species near the Rocky Mountains, whilst 

 descending the Arkansaw river with Major Long's exploring 

 party. It is at once distinguishable from its companions on the 

 annexed plate, by the confused and dense puncturatiou of its 

 elyti'a. 



The middle figure. 



[This is a variety of Pachybrachys viduatus according to Suf- 

 frian, Linn. Ent. 7, 154. — Lec.] 



Cryptocephalus viduatus. — Specific character. Black ; 

 thorax with three abbreviated yellow lines; elytra yellow, with 

 two black vittae. 



Cryptocephalus viduatus Fabr. Syst, Lieut, pt. 2, p. 49. 

 No. 49. 



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