NATURAL SCIENCES OF PHILADELPHIA. 49 



Above pale, large frontal spot, discoidal spot and anterior angles of thorax, 

 suture and sides of elytra blackish ; feet and hind coxa? pale, metasternum 

 and abdomen blackish, *12. Middle States. . . 6. 1 i m b a li s (Mels. ) 



Entirely luteous, *09. Pennsylvania. . . . . 7. v a p i d a. 



Entirely black, pubescence grayish sericeous, -09 -11. California. 



8. vilis (Zee.) 



b. First and second joints of hind tarsi each with two oblique ridges : 



Narrow, parallel ; body yellow ; head behind the antenna? blackish ; thorax 

 with the front half yellow, with a medial cloud ; hind half black ; elytra 

 black, with a large, elongate basal spot ; margin and suture, behind the mid- 

 dle, yellow, - 12. Western States. . . . . 9. decorella. 



c. First joint of hind tarsi with three, second with two oblique ridges ; 

 body narrow, slightly cuneate : 



Reddish yellow, base of thorax and elytra black, the latter with a large tri- 

 angular basal spot on each, yellow suture and margin behind the middle nar- 

 rowly yellow, -14. Middle and Southern States. . 10. oniata(JA/s.J 



Black, head and humeral spot of elytra reddish yellow ; anterior feet yel- 

 low, hind feet black, varied with testaceous, - 09. Middle and Northern States. 



11. militaris. 



Black, elytra "with an orange yellow oblong humeral spot, -16. Middle 

 and Western States. ..... 12. s ca p u 1 a ri s {Say.) 



Blackish, densely clothed with grayish sericeous hair; head and thorax red- 

 dish yellow, the latter black at the base ; feet testaceous, *12 - 17. Colorado 

 Desert, California. ....... 13. co mat a {Lee.) 



Pale yellowish brown, slightly cuneate, hind tibia? with a very faint trace 

 of a 3d ridge, *12. Georgia. ....... 14. t o s t a. 



Black, linear, pubescence fine and dark ; head before the eyes, anterior part 

 of thorax, front and middle thighs ferruginous; antennae piceous, - 11 *13. 

 Middle States. ......... 15. picicornis. 



Black, linear, pubescence brown sericeous ; head before the eyes and thorax 

 ferruginous, the latter with a linear dorsal cloud, "11. New York. 



16. cervicalis. 



Black, linear, pubescence brownish gray, hind tibia? with a very faint trace 

 of a 3d ridge, -09 -11 17. as p e rs a (Mels.)* 



d. First joint of hind tarsi with three, second with one oblique ridge ; 

 body narrow, almost parallel : 



Head, thorax and feet reddish yellow ; elytra fuscous, with the humeri and 

 apical margin reddish yellow ; abdomen, sternum and hind coxa? and femora 

 blackish ; incisures of hind feet blackish, *09. Illinois. 



18. fulvicollis (Mels.) 



c. Ridges parallel, the anterior one extending almost across the outer face 

 of the tibia?. 



a. First joint of hind tarsi with two, second with one oblique ridge; elytra 

 black, with two yellow bands precisely as in species 4 and 5. 



Head, thorax and feet yellow, thorax with a nanow dorsal cloud ; elytra black, 

 with two yellow bands, the anterior one interrupted by the suture; trunk black- 

 ish, -10 Georgia 19. arnica. 



b. First joint of hind tarsi with three, second with two oblique ridges. 

 Black covered with cinereous pubescence ; elytra with two broad bands, and 



the apex black pubescent, -08. S.Carolina 20. in fi ma. 



* The pubescence of this species is described by Dr. Melsheimer (Pr. Ac, 2, 314) as 

 being mottled, but the type furnished by him, on being carefully cleaned and remounted, 

 shows a uniformly diffused covering of brownish gray hair. 



1862.] 4 



