1106 



FAMILY LI1I. — CHRYSOMELlDiE. 



fully so," but the beginner will evidently class the tips as rounded, 

 and I have therefore placed it in the present group. 



D. pusilla Say, greenish or coppery -hronzed, second and third 

 antennal joints equal, length 6-8 mm., ranges across the northern 

 United States, has been recorded from Michigan and perhaps oc- 

 curs in northern Indiana, 



2036 (6541). Donacia emakginata Kirby, Faun. Bor. Amer., IV, 1837, 224. 

 Elongate, slender, convex. Dark metallic blue, rarely purple or bronzed ; 



antenna? black, the joints often reddish at base, second and third joints 

 nearly equal. Thorax longer than wide, median line distinct, sides with a 

 rounded tubercle on apical half ; surface minutely rugose, finely and densely 

 punctate. Elytra with an impression in front of middle, rounded at tip ; 

 sutural margin strongly sinuate on apical fourth; intervals feebly convex, 

 transversely rugose. Last dorsal segment of male emarginate. Length 6- 

 7 mm. 



Lake County; frequent locally. May 15-June 15. Taken by 

 beating tall sedges along sloughs near Pine. 



2037 (6545). Donacia metallica Ahrens, Neu. Schrift. Ges. Halle. I. 



1810, 33. 



Elongate, rather slender, convex. Color variable, usually greenish or 

 bronzed, sometimes blackish, strongly shining. Second and third antennal 

 joints subequal. Thorax longer than wide, narrowed near base, tubercles 

 on sides evident but feeble, median line fine ; disk minutely rugulose. finely 

 and rather densely punctate. Elytra convex, tips rounded, punctures rather 

 coarse ; intervals almost flat, nearly smooth. Length 5.5-7 mm. 



Lake County, scarce; Marion County, frequent at Crow's Nest, 

 near Broad Ripple, on the base of the leaves of skunk cabbage, 

 Symplocarpus fartidus Salisb., April 26-May 15. 



2038 (6546). Donacia flavipes Kirby, Faun. Bor. Amer., IV, 1837, 223. 

 Elongate, rather slender, convex. Bronzed coppery, rarely dark blue, 



shining; antenna- and legs reddish-yellow. Antenna? rather robust third 

 joint one-third longer than second. Thorax one-half longer than wide, me- 

 dian channel wide, rather deep; tubercles on sides large, rounded, some- 

 what prominent; surface finely transversely rugose, densely and minutely 

 punctate. Elytra usually with two shallow transverse impressions near 

 middle ; punctures coarse, quadrate : intervals strongly transversely rugose ; 

 distinctly sinuate near the tips, which are rounded. Mesosternum nar- 

 rower than coxa? ; first ventral segment shorter than metasternum. Length 

 7-8.5 mm. 



Northern half of State, common; not taken south of Vigo and 

 Wayne counties. May 5-Jnne 15. Occurs on reeds, rushes and the 

 arrow-alum, Peltmulra uvdulaia Eaf. Mating May 21. 



