1150 



FAMILY LIU. CHRYSOMELID.L. 



KEY TO INDIANA GENERA OF CHRY SOMELINI. 



a. Tarsal claws simple. 



h. Third joint of tarsi entire or scarcely emarginate (except in Praso- 

 curis, where it is bilobed). 

 c. Thorax not margined at base ; species mostly rather elongate, 

 slightly convex, striped. XXXIII. Prasocuris. 



cc. Thorax margined at base ; species larger, more robust and convex. 

 (1. Last joint of palpi short, truncate. 



e. Mesosternum prominent, forming a blunt tubercle between the 

 middle coxa^ ; front femora of male strongly toothed. 



XXXIV. Labidomera. 

 ee. Mesosternum not raised above the level of the prosternum ; 

 femora simple. XXXV. Leptinotarsa. 



(Id. Last joint of palpi not shorter than next to last. 



/. Tarsal claws parallel, united at base ; claw joint dentate be- 

 neath. XXXA^I. Zygogramma. 

 //. Tarsal claws divergent; claw joint simple. 



g. Sides of thorax not thickened; elytra with darker markings 

 limited by impressed punctures. 



XXXVII. Calltgrapha. 

 gg. Sides of thorax thickened ; elytra without spots. 



XXXVIII. Chrysomel^. 



~bl). Third joint of tarsi emarginate or bilobed. 



//. Sides of thorax not thickened; elytra unicolored. 



i. Punctures of elytra in regular rows ; tibia? not grooved on the 

 outer side. Plagiodera. 

 it. Punctures of elytra dense and confused ; tibia? grooved on outer 

 side. XXXIX. Gastroidea. 



////. Sides of thorax thickened; elytra often spotted or spotted and 

 striped. XL. Lixa. 



a a. Tarsal claws toothed or bifid ; tibia? not dilated and not toothed. 



XLI. Phyllodecta. 



XXXIII. Prasocuris Lat, 1802. (Gr., "leek-green + a spear.") 



Rather small, elongate or oval, feebly convex species having the 

 upper surface brassy-green or bronzed-black and striped with dull 

 yellow. The three known species have been taken in the State, 

 while a fourth is herewith described for the first time. 



key to species of prasocuris. 



a. Yellow stripes of elytra not united at base. 



1). Form elongate, parallel ; length 5 or more mm 

 1)1). Form short-oval ; length not over 1 mm. 



2131. phellandrii. 

 2132. ovaus. 



