NATURAL SCIENCES OF PHILADELPHIA. 81 



interstices costate, L. .22-.2G. Middle and Western States, Ari- 

 zona, New Mexico. 



3. 0. notata, 01. 1. c. t. 2, f. 26. 



Black, thorax red, with the disk black ; form of 0. scapularis, 

 but elytra less acutely costate; less visible serrate at apex. L. 

 .24. Southern States. 



4. 0. scutellaris (01.), 1. c. f. 21. siituralis % Harr. Ins. p. 98. 



Rather broad parallel, black, thorax and el3'tra red; the latter 

 with the suture black; the color dilating behind. L. .24. Middle 

 and Southern States. 



Var. Suture narrowly black, color broadest in front. 



5. 0. bicolor (01.), 1. c. f. 27. Bacchus, Newm. Ent. 76. 



Black, elongate, parallel, thorax, scntellum, and under side red ; 

 elytra acutely costate. L. .25. Georgia, Illinois. 



6. 0. WalsMi, sp. n. 



Elongate, parallel, black, thorax red above ; head smooth above, 

 deeply foveate between the ej'cs, antennae rather shorter than 0. 

 hicolor, 3d joint elongate, nearly equal to the two following ; 

 thorax transverse, sides rounded, hardly narrowed in front ; 

 deeply punctate ; elytra with ten uniform rows of deep approxi- 

 mate punctures, the 8th interstice only carinate ; beneath opaque, 

 metasternum shining. L. .14. Illinois (Entomological Society). 



7. 0. rubra (Web.), Obs. p. 66. quadmta (Fab.), Syst. El. ii. 60. 



Rose red, accuminate in front, elytra dilate, and obtusely punc- 

 tate behind ; metasternum and middle of ventral segments black ; 

 elytra acutely costate ; the 3d costa visible at base and apex onl}^ 

 L. .20. Texas, California, Middle States. 



8. 0. rosea (Web.), Obs. Ent. p. 66 ; inaqualis (Web.), 1. e. ohsoleta (Say) J. Acad. 



iii. 4.32; 'pallida (Say) 1. c, S7(turalis (Fab.) Syst. El. ii. 63. Philemon 

 (Newm.) E. M. v. 390; Baucis (Newm.) 1. c. Jiavipes, Germ, sp., Nov. 529. 



Black, elytra elongate quadrate, finely serrate ; legs pale, tho- 

 rax and elytra marked irregularly with fuscous, the latter acutely 

 costate. L. .15. Canada, Middle and Southern States, Texas. 



Var. Body beneath pale red. 



9. 0. nigrita (Oliv.), 1. c. f. 35, Baly, Tr. Ent. Soo. Lond. ii. 251. 



Narrow, linear, black, or suba^neous ; elytra parallel, acutely 

 costate ; thorax longer than broad, coarsely punctate. L. ,15-.16. 

 Southern States. 



