1162 FAMILY LJII. CHRYSOMETJDJK. 



Tribe IX. GALERUCINI. 



Small or medium-sized leaf-eating beetles, having usually a 

 somewhat oblong form and a softer body covering than in those 

 tribes already treated. All of them agree in having the head ex- 

 posed ; antennas placed upon the front between the eyes and there- 

 fore close together at base, the third joint usually smaller than 

 fourth ; eyes not emarginate, finely granulate ; thorax truncate or 

 emarginate in front, with the sides distinctly margined; elytra 

 longer than abdomen; prosternum very narrow, usually invisible 

 between the front coxre, which are therefore contiguous; hind 

 femora slender, adapted for walking; hind tibire usually without 

 terminal spurs; tarsi slender, not retractile. 



Many members of the tribe are very injurious to vegetation, 

 among them being the striped cucumber beetle, the long-horned 

 corn beetle and the imported elm-leaf beetle. The principal papers 

 treating especially of the genera comprising the tribe are as follows : 



LeConte. "On the Species of Galeruca and Allied Genera in- 

 habiting North America," in Proc. Phil. Acad. Nat. Sci., 

 1865, 204-222. 

 Horn. "The Galerucini of Boreal America," in Trans. Amer. 



Ent. Soc., XX, 1893, 57-136. 



Horn, in the paper last cited, recognized 20 genera as belonging 

 to the tribe. Of these 12 are known to be or should be represented 

 in the State. 



KEY TO INDIANA GENERA OF GALEKUCINI. 



o. Front coxnl cavities closed behind. 



&. Tarsal claws appendiculate, i. e., with broad expansion at base; tibia? 



with spurs ; smaller, not over 7 mm. 



c. First joint of antenna? longer than fourth, third joint elongate ; 

 elytra dull red or yellow with black spots. XLII. CEROTOMA. 

 cc. First joint of antenna? not longer than fourth, third joint shorter ; 

 elytra metallic blue or greenish. AGELASA 



1)1). Tarsal daws bifid; front and hind tibia? without spurs; larger, 9 or 

 more mm. XLIII. GALERUCA. 



rid. Front coxal cavities open behind. 

 <1. Claws of tarsi bifid or simple. 



e. All the tibia? without terminal spurs. 



/. Epipleura* short, scarc-ely passing the middle of elytra ; elytra 

 metallic blue with a dull yellow median crossbar. MONOCESTA. 

 //. Epipleursf long, reaching nearly to tips of elytra. 



g. Antenna? longer than half the body; tarsal claws deeply bifid 

 in both sexes. 



