34: [February, 



with fine punctiires ; legs and iinder surface ferruginous; epipleurae brown. Tab. 

 l.fig. 8. 



Localiti/. Kansas and Illinois ; specimens from the latter locality were collect- 

 ed by Mr. R. Kennicott. 



This insect is allied to 0. p u 1 c h r a, but in that species the outer vittae arc 

 usually entirely confluent into one broad stripe. In C. casta these lines are 

 narrow and the subsutural one is confluent only behind the middle. 



11. C. coniuncta. Oval, convex, ferruginous; thorax yellow, sparsely 

 punctured with a large ferruginous spot covering the base ; elytra pale yellow, 

 with the suture and subsutural vitta confluent ; the other two connected behind 

 and a short one at the humerus, legs and under surface ferruginous. Tab. 1, 

 fig. 9. 



Length. -23. 



Locality. Kan sas . 



Related to C. e x c 1 a m t i o n i s, but is smaller, with head and thorax more 

 shining and less punctured ; with the conjoined Aattse more abbreviated behind 

 there is no lateral dot at the middle, and the epipleurae are not ferruginous, ex 

 cept at the extreme margin. 



12. C. d i s r u p t a . Round and convex, blackish ; thorax coarsely punctured, 

 elytra pale yellow, punctured ; the suture, sub-sutural vitta and three other 

 discoidal narrow ones anteriorly abbreviated, with several sub-marginal bronzed 

 dots; legs and under surface blackish. Tab. 1, fig. 10. 



Length. -21 -20. 



Locality. Louisiana and Kansas. 



This insect is of the same form as the previous ones, but may be dis- 

 tinguished by the interruption of the interior dorsal vittae ; the middle one nearly 

 unites posteriorly with the inner one, but is a little shorter than it; the outer 

 posterior dots are directly in continuation of the external abbreviated vitta : 

 epipleurae pale. 



13. C. h y b r i d a. Ferruginous, elytra pale yellow, with a wide sutui-al and 

 discoidal ferruginous band, the band nearly divided into two, of which the inner 

 one is narrower. Tab. 1, fig. 11. 



Lengtii. -35. 



Say, J. Acad. 3, 449. .' 



Locality. Southern States and Nebraska. 



Body oval, thorax irregularly punctured and with larger confluent punctures 

 on the sides ; scutellum impunctured, rounded at the tip ; antennae, legs and 

 under surface ferruginous. 



There is _great variety in the marking, a specimen from Nebraska has the 

 band divided into three, the first joined to the second at the base, the middle 

 one sinuous and joined to the outer one at the tip, the outer one very faint, at 

 the base. 



14. 0. incisa. Oval, rounded, bronzed, ferruginous; tliorax with coarse 

 punctures; elytra pale yellow, with abroad blackish brown sutural vitta ab- 

 breviated at the base, a broad stripe narrowed at the humerus and not reaching 

 the base, and a small dot at the base, and another at the tip ; cpii)leurae dark. 

 Tab. 1, fig. 12. 



Length. -24. 



Locality. One specimen from Kansas. 



This insect has the same form and size as 0. p u 1 c h r a, the punctures of the 

 dark vitta and those of the external rows are, however, more distinct, and the form 

 of the vittae different. The sutural one is not prolonged at the base, but trun- 

 cate anteriorly at the scutellum, which, as usual, is dark colored ; at about two- 

 thirds the length it is suddenly slightly dilated nearly to the apex. The outer 

 vitta is a very broad spot extending three-fourths the length of the elytra ; 

 nan'owed before and behind, convex on its inner, but moderately emarginate on 

 its outer surface about the middle. 



