THE LEAF BEETLES. 



1105 



its entire length. Elytra depressed, the punctures rather fine and deep; 

 intervals flat, finely, transversely wrinkled; sutural margin sinuate for 

 only about one-tenth its length near apex. Hind femora armed with an 

 acute tooth. Length 7-9 mm. 



Starke County; rare. May 19. Taken from leaves of the yel- 

 low water-lily. A northern form, known heretofore from "Wis- 

 consin, Michigan and Massachusetts. 



D. torosa Lee, thorax nearly smooth, length 6-7 mm., is known 

 from Massachusetts, Illinois and Iowa, 



Group C. 



Our six members of this group agree in having the elytra 

 rounded at tip and their sutural margin distinctly sinuate near 

 apex. The form is always convex and the middle coxa? are sepa- 

 rated by less than their own width. 



KEY TO SPECIES OF GROUP C. 



a. Eyes small ; size larger, 10-11 mm. ; strongly convex. 2035. harrisii. 

 aa. Eyes of normal size ; smaller, not over 8.5 mm. ; less convex. 



&. Thorax depressed, without basal or median line ; hind femora toothed 

 in both sexes. pusilla. 

 1)1). Thorax convex, punctured; basal line distinct, median one usually so. 

 c. Thorax closely punctulate ; hind femora club-shaped. 

 d. Legs dark. 



e. Hind femora toothed in both sexes ; color usually dark blue. 



2036. EMARGINATA. 



ce. Hind femora toothed in male only; color metallic green or 

 blackish. 2037. metallica. 



del. Legs reddish-yellow ; hind femora toothed in both sexes. 



2038. FLAVIPES. 



cc. Thorax sparsely punctured; hind femora elliptical; legs reddish- 

 yellow. 2039. RUFA. 



2035 (6524). Donacta haurisii Lee, Proc. Phil. Acad. Nat. Sci., V, 1851, 

 316. 



Elongate, robust, convex. Piceous bronzed; head and thorax often 

 with a cupreous tinge. Antenme slender, piceous, joints often paler at 

 base; third more than one-half longer than second. Thorax distinctly 

 longer than wide, scarcely narrowed behind, tubercles on sides very feeble : 

 disk densely and finely strigosely punctate. Elytra with tips rounded or 

 very slightly subtruncate ; punctures comparatively fine and deep ; intervals 

 subconvex, densely rugose. Length 10-11 mm. 



Lake and Kosciusko counties; rare. June 3-June 23. Swept 

 from sedges in low moist meadows. The large size, small eyes and 

 sinuate sutural margin of elytra distinguish this species. Leng 

 places it in the group with truncate tips of elytra, since he "in- 

 cludes thus all forms that are in the least truncate or even doubt- 



