1104 PW.MIl-V LIII. CriRYSOMEIJD.K. 



rax slightly longer than wide, sides almost straight, dislv transversely ru- 

 gose, with punctures between the wrinkles; median line shallow but dis- 

 tinct. Elytra each with two shallow impressions near middle; punctures 

 oblong, intervals nearly Hat, transversely, densely rugose; tips more nar- 

 rowed than in the preeetling species, squarely truncate. Length 7-10 nnn. 



Lake, Marshall, Kosciusko and Vico counties; common. i\Iay 

 12-Angnst 20. Occurs on leaves and stems of sedg'es and arrow- 

 alum along ])()rders of ponds and lakes. Mating ]\lay 21 and June 

 20. In a form from Lake County the females are much more ro- 

 bust, more convex, and more shining, w'ith shorter thorax than in 

 typical su])filis. They ar<' pi-olnihly to be referred to var. fnlgens 

 Lee. 



2032 (0537). Doxacia rkjosa Lee, Proc. Amer. Phil. Soc, XVIII, 1878, 



415. 

 Resembles siihtilis closely in form and color. The antemuie are longer 

 and more slender, with the third .iolnt distinctly longer than second. Tho- 

 rax slightly constricted at middle, surface more densely and finely punc- 

 tured. Length 8.5 mm. 



Two specimens taken at Bass Lake and Lake Maxinkuckee, Au- 

 gust L5 and 20 were submitted to Long, who pronounced them this 

 species. He writes that lie now considers riifiosa a distinct specie-s 

 instead of a variety of sxhfilis, and that it has been found to live on 

 pickerel weed, whereas suljlilis lives on reeds and sedges. 



D. porosicoJlis Lac, coppery-bronzed, length 10 mm., is recorded 

 from Michigan and Pennsylvania. 



2033 (G539). Donacia jeqvajas Say. .Teurn. riiil. Ai-ad. Nat. Sci.. III. 



1823, 428 ; ibid. II, 202. 

 Elongate-oblong, rather slender, subconvex. Bronzed, shining; tibite, 

 tarsi and base of femora reddish-brown. Second and third .loints of an- 

 tenuje equal. Thorax as long as broad, median line distinct, sides with a 

 rounded tubercle before the middle; disk somewhat uneven, finely and 

 densely punctate. Elytra with two shallow, subsutural, transverse impres- 

 sions near the middle; intervals flat. feel)Iy rugulose; tips obliquely trun- 

 cate. Length 5.5-7 mm. 



Lake, Wells and Jaclvson counties; scarce. May 27-October 14. 

 Occurs on reeds and sedges along the borders of marshes and 



streams. 



20.34 (05.35). Donacia msTiNCTA Lee, Agass. Lake Sup.. 1850, 230. 



Elongate, slender. Cupreous, Itronzed : head, antenn.'e and legs clothed 

 with very short, fine, wliilisli ]iul>escence. Anteunre rather slender, the 

 third joint nearly one-half longer than second. Thorax quadrate, narrowed 

 near base, angles prominent, sides with blunt tubercles; disk sparsely, 

 irregularly nnd iMther finely iiunctate. the median line distinct for nearly 



