1104 



FAMILY LIII. CHRYSOMELIDiE. 



rax slightly longer than wide, sides almost straight, disk 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 flat, transversely, densely rugose; tips more nar- 

 rowed than in the preceding species, squarely truncate. Length 7-10 mm. 



Lake, Marshall, Kosciusko and Vigo counties; common. May 

 12-August 20. Occurs on leaves and stems of sedges and arrow- 

 alum along borders of ponds and lakes. Mating May 21 and June 

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

 bust, more convex, and more shining, with shorter thorax than in 

 typical subtilis, They are probably to be referred to var. fulgens 

 Lec. 



2032 (6537). Donacia kugosa Lec. Proc. Amer. Phil. Soc, XVIII, 1878, 



415. 



Resembles suMilis closely in form and color. The antenna? are longer 

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

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

 tured. Length S.5 mm. 



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

 gust 15 and 20 were submitted to Leng, who pronounced them this 

 species. He writes that he now considers rugosa a distinct species 

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

 pickerel weed, whereas subtilis lives on reeds and sedges. 



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

 from Michigan and Pennsylvania. 



2033 (6539). Donacia jeqvaus Say. Journ. Phil. Acad. Nat. Sci.. III. 



1823, 428 ; ibid. II, 202. 



Elongate-oblong, rather slender, subconvex. Bronzed, shining; tibia?, 

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

 tenna? 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, feebly rugulose; tips obliquely trun- 

 cate. Length 5.5-7 mm. 



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

 Occurs on reeds and sedges along the borders of marshes and 

 streams. 



2034 (6535). Donacia distincta Lec, Agass. Lake Sup., 1850. 236. 

 Elongate, slender. Cupreous, bronzed ; head, antenna? and legs clothed 



with very short, fine, whitish pubescence. Antenna? 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 and rather finely punctate, the median line distinct for nearly 



