THE OIL AND BLISTER BEETLES. 1355 



KEY TO INDIANA SPECIES OF NEMOGNATHA. 



(/. Palpi rather short, not very slender, hairy; spurs of hind tibia. 1 equal 



in size, rather slender. 



I. Elytra finely and very densely punctured; thorax not wider behind. 

 c. Thorax quadrate; maxilla 1 two-thirds or more the length of body. 

 (/. Thorax densely punctured ; color variable. PIEZATA. 



ild. Thorax sparsely punctured; elytra either wholly yellow or brown- 

 ish-yellow, with a black stripe. 2513. PUNCTULATA. 

 cc. Thorax nearly oval, yellow, with black spots, finely and rather 

 sparsely punctured ; maxilla? half the length of body. 



2514. NEMORENSIS. 



lit. Elytra less finely and less densely punctured, yellow, with a wide 

 black stripe ; thorax yellow, rather sparsely punctured. 



CKIBBARIA. 



(/<?. Palpi longer and more slender, not hairy but only pubescent; maxilla? 

 less than half the length of body: spines of hind tibia 1 broad, obtuse. 

 c. Thorax rather finely and densely punctured ; elytra wholly orange 

 yellow or rarely with a broad black stripe. 2515. VITTIGERA. 



cc. Thorax very coarsely, sparsely and irregularly punctate; elytra yel- 

 low or dark brown. 251G. CKIBKICOLLIS. 



N. piezata Fab., male with fourth ventral broadly sulcate, fifth 

 impressed, length 7-11 mm., is said to occur from the "Atlantic Re- 

 gions to Colorado and Montana." 



2513 (8032). NEMOGNATHA PUNCTUIATA Lee., Proc. Phil. Acad. Nat. Sci., 



VI, 1853, 347. 



Elongate-oblong. Orange yellow, sparsely clothed with yellow hairs ; 

 antenna? (except at base), tarsi and greater part of under surface blackish. 

 Head finely and densely punctate, with front flat; occiput swollen. Tho- 

 rax one-third wider than long, sides almost straight, disk sparsely, coarsely 

 and irregularly punctate. Elytra minutely and very densely punctured. 

 Length S-ll mm. 



Jackson County ; rare. July 16. The form described is var. 

 flavipennis TThler. In the typical form the upper surface is brown- 

 ish-yellow, the elytra with a black stripe. 



2514 (8034). NEMOGNATHA NEMOKENSIS Hentz., Trans. Ainer. Phil. Soc.. 



Ill, 1830, 258. 



Elongate-oblong. Black, rather thickly clothed with short, erect black 

 hairs; mandibles, middle of head and thorax yellow, the latter usually with 

 two black spots on basal half which are often united. Maxilhc one-half 

 the length of body. Length 6.5-7.5 rum. 



Crawford County; rare. June 2-June 28. 



N. crib aria Lee., male with fourth and fifth ventrals impressed 

 and with median tufts of black hairs, length 6.5-8.5 mm., ranges 

 from "the Middle and Western States to New Mexico." 



