schaeffer: donaciini of the new world. 85 
color and sculpture entirely; pubescent space near anterior coxae wide; 
posterior femora moderately incrassate in more than apical half; inter- 
coxal process of mesosternum as wide as the coxal cavities. Length: 
6.5-9 mm. 
Male: Last ventral segment depressed at middle of apex; last 
dorsal segment broadly rounded at apex; posterior femora below with 
two teeth and behind the posterior one an oblique ridge which is generally 
broken up into one or more denticles, the anterior tooth occasionally 
very small and scarcely visible; posterior tibiae sparsely serrulate 
internally. 
Female : Last ventral segment rounded at apex ; last dorsal segment 
slightly narrower, rounded at apex; posterior femora below with one 
tooth and behind a more or less distinct serrate ridge, which is represented 
occasionally by a few denticles; posterior tibiae not serrulate internally. 
British Columbia: Victoria (Ent. Branch). 
Manitoba: Aweme, September (Criddle); Piquitenay, July (Wallis). 
Idaho: Coeur d'Alene (Hubb. & Schwarz coll.). 
Minnesota: Lake Ithasca, August (Graham). 
Wisconsin: Tenderfoot Lake, Vilas Co., August (Marshall). 
Michigan: Huron Mts., August (Hubb. & Schwarz) ; Douglas Lake, August 
(Hatch) ; Marquette, April (Hubb. & Schwarz) ; Macatawa Beach, 
June (Nat. Mus.). 
Quebec: Montreal, July (Chagnon) ; Mt. St. Hilaire, July (Knab coll.); 
Rigaud (ex Liebeck); Brome Co., July (Winn ex Chagnon). 
Nova Scotia: Truro, August (Matheson). 
Newfoundland: Codroy, Little River, July (Wickham) ; Spruce Bruce, 
August (Engelhardt). 
Maine: Wales, June (Frost); Monmouth, June (Frost). 
New Hampshire: Mason, June (Ericson). 
Massachusetts: Chicopee, September (Knab); Attleboro, July (Frost); 
Brookfield, July (Knab.). 
New York: Pike (N. Y. State coll.); Huron, Brant Lake, August (Doll); 
Orange Lake, Orange Co., September (Schaeflfer) ; Ausable Lake, Essex 
Co., July (Notman); Ballston Lake, August (Leonard). 
Pennsylvania: Erie (Penn. St. coll.); Baoba, Pike Co., July (Wenzel). 
The yellow water lily is the host plant of this species. 
This is a little shorter and broader insect than cincticornis, the 
posterior femora are shorter and relatively less strongly incrassate, the 
anterior impression of prothorax distinct and the outer apical angle of 
elytra is broadly rounded. The antennae are generally entirely black, 
