NATURAL SCIENCES OF PHILADELPHIA. 6Y 



8. 0. aeneicollis, sp. n. 



Shape and size of 0. Lewisii, el3'tra l)lue-green, thorax oeneous ; 

 antennje very distinctly shorter and stouter than in the preceding; 

 elytra with traces of deeper punctures arranged serially, especi- 

 ally two rows near the suture at the base ; tibiae pale. L. .9. 

 Texas (Belfrage, 814), Middle and Southern States. 



Prosternum rugose, sometimes the elytra are less blue and 

 more ffiueous, and have the whole tibia pale. 



9. 0. chalybeipennis, sp. n. 



Rather like 0. seneicollis but much larger; above clear blue, 

 beneath black; antenna?, four anterior legs, and posterior tibins 

 red; head with an elevated carina between the eyes; vertex 

 sparsely punctulate ; thorax alutaceous, punetulate ; elytra punc- 

 tulate, with very evident traces of striae of larger punctures before 

 the middle ; prosternum rugose. L. .11. Xew Jersey. 



Aphtiionia, Chevr. 



Thorax not margined at base, coxal cavities open ; elytra punc- 

 tate, first joint of posterior tarsi not elongate. 



1. A. picta (Say.), J. Acad., iv. 87. 



Ovate, shining, black ; head, thorax, antennae, and legs bright 

 ferrugineous ; elytra blue ; head with a raised smooth space on the 

 vertex ; thorax much broader than long, very sparingly punctate ; 

 elytra sparingly and obsoletely punctate. L. .8. Southern 

 States. 



2. A. texana, sp. n. 



Ovate, not convex; same coloration as the preceding, but 

 closely punctate on the upper surface throughout ; elytra with 

 irregular rows of larger punctures. L. .10. Texas (Belfrage, 

 431). 



Dibolta, Chevr. 



Anterior coxae not prominent, subtransverse ; head deeply- sunk 

 in the thorax, vertical; antennre almost contiguous on the front; 

 elytral epipleurae very narrow after the first third ; posterior 

 tiba? broad, apical spur large and bifid at the extremity. 



D. serea, Mels. Pr. Acad., iii. 167. 



Ovate, convex, shining, bluish-green or geueous; legs and an- 



