IMd PAMIl.V Mil. CHEYSOMBLID/T;. 



KEY TO INDIANA GENERA OF CHEySOMELINI. 



a. Tarsal claws simple. 



h. Third joiut of tarsi entire or scarcely emarginate (e.xcept in I'riiso- 



curis, where it is bilobed). 



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



slightly convex, striped. XXXIII. Prasocubis. 



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



(I. Last joint of palpi short, truncate. 



c. Mesostenium prominent, forming a blunt tubercle between the 

 middle cuxa' ; front femora of male strongly toothed. 



XXXIV. Labidomera. 

 cr. Mesostenium 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. XXXVI. Ztgogbamma. 

 //. Tarsal claws divergent; claw joint simple. 



f/. Sides of thorax not thicliened; elytra with darker markings 

 limited by impressed punctures. 



XXXVII. Calmgrapha. 

 ffff. Sides of thorax thickened ; elytra without spots. 



XXXVIII. Ohrtsomela. 

 66. Third joint of tarsi emarginate or bilobed. 



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



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



outer side. Plagiodera. 



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



side. XXXIX. Gastroidea. 



/(//. Kides of thorax thickened; elytra often spotted or spotted and 



^"t"Ped. XL. Lina. 



iia. Tarsal claws toothed or bifid ; tibire not dilated and not toothed. 



XLI. Phyllodeota. 



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

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

 upper surface brassy-.-reen oi' bronzed-black and striped with dull 

 yolloiA-. The three known speeies have been taken in the State, 

 while a fourth is heremth described for the first time. 



key to species oe prasocuris. 

 a. Yellow stripes of elytra not united at base. 



h. Form elongate, parallel ; length 5 or more nun. 2i:si. phellandrii 

 hi). Form short-oval: len^-lh not over 4 nun. 21:!-' ,)v.uis 



