THE LEAF BEETLES. 



1221 



225i i 7000). SYSTENA ELONGATA Fabr.. Ent. Syst, Supp., 1798, 99. 



Elongate-oval, moderately convex. Piceous with a slight bronzed lus- 

 tre; elytra each with a yellow stripe on middle reaching nearly to apex; 

 antenna? brownish ; legs reddish, hind femora piceous. Head coarsely and 

 closely punctate. Thorax one-fourth wider than long, sides feebly curved ; 

 disk convex, coarsely and closely punctate. Elytra distinctly wider at base 

 and more finely and sparsely punctate than thorax. Length 3^ mm. 



Posey County; rare. April 12. Beaten from wild grape. 



2200 (TOO:',). SYSTENA T^ENIATA Say, Long's Sec. Exped., 1824, 294; ibid. 



I, 195. 



Elongate-oval. Color variable, usually 

 reddish or brownish-yellow, shining; elytra 

 each always with a paler median stripe ; un- 

 der surface and narrow margins of thorax 

 usually piceous; antenna? and legs reddish - 

 IIIMWII. Thorax one-fourth wider than long, 

 sides feebly rounded, surface finely and 

 sparsi-ly punctured. Elytra distinctly wider 

 than thorax, finely, shallowly and rather 

 densely punctate. Length 3-4.5 mm. ( Fig. 

 543.) 



Throughout the Stale; frequent . 

 May 16-July 25. Occurs on ragweed, 

 horseweed, flowers of Cornel, etc. The 

 form above described is var. Winnln .Melsli., the only variety so far 

 noted in the State. A variety with median pale stripe of elytra 

 much narrower is also known. (Fig. r>40. ) 



22G1 (7002). SYSTENA MAKGINAI.IS 111., Mag. fur Insect, VI, 1807, 15O. 



Elongate-oval, subdepressed. Pale dull yellow, scarcely shining; sides 

 of thorax and elytra very narrowly piceous ; antenna? with the terminal 

 halves of the outer joints piceous. Head alutaceous, sparsely and regu- 

 larly punctate. Thorax' one-third wider than long, not broader at base 

 than apex, sides regularly curved ; disk coarsely, not closely punctured. 

 Elytra distinctly wider at base than thorax, rather densely and coarsely 

 punctate. Length 3.5-4 mm. 



Lake and Marshall counties; scarce. July 11- August 21. Oc- 

 curs on oak. 



Hi;. 543. 9. 'After l<orl.) 



LXXT. DIROLTA C'hev. 1834. (Gr., "two + spine.") 



Small oval or oblong 1 species having 1 the head founded, retracted 

 within the apex of thorax; front carinate with distinct tubercles; 

 antenna? at least half as long as body, tin outer joints a little 

 stouter; thorax broader than long, much narrowed in front; elytra 

 oval, not wider than base of thorax, with regular rows of punc- 

 tures; hind femora strongly dilated, tibia? slender, broader and 



