88 BROOKLYN MUSEUM SCIENCE BULLETIN 3. 3. 
cupreous tint in certain parts; antennae generally black, occasionally 
the joints narrowly reddish at base; legs almost entirely metallic, femora 
usually purple and occasionally narrowly red at base. 
Head rather feebly constricted behind the eyes, which are moderately 
large and moderately prominent; median line deeply impressed; posterior 
tubercles absent; surface densely and rather finely punctate; antennae 
rather stout, scarcely reaching to the middle of elytra in the male, second 
and third joints short, equal or sub-equal and together as long as the 
first joint. 
Prothorax slightly wider at apex than long; anterior angles distinct, 
not prominent, more or less rounded; posterior angles not prominent; 
lateral tubercle more or less distinct but not prominent, sides below the 
latter feebly converging to base; surface rather coarsely and usually 
not densely punctate, punctures laterally denser and more or less con- 
fluent; median line deep; sub-basal impression generally feeble or absent. 
Elytra truncate at apex, outer apical angles distinct but rounded; 
ante-median impressions generally distinct; post-median impressions 
absent or faint; strial punctures coarse, larger than the intervals, 
gradually smaller to apex; intervals usually smooth on the disk, rugose 
at sides and apex, occasionally with a few coarse rugae on the disk. 
Body below densely and finely punctate and moderately densely 
pubescent with very short cinereous hairs ; pubescent space near anterior 
coxae rather small; intercoxal process of mesosternum moderately wide, 
about half of the width of coxal cavities. Length: 5.5-7.5 mm. 
Male: Last dorsal segment broadly truncate at apex; last ventral 
segment broadly rounded at apex; posterior femora extending to the 
apex of elytra or slightly beyond; strongly incrassate in about apical 
three fourths or less, armed below with two teeth, the inner, smaller one 
nearly opposite the larger outer tooth; behind the latter occasionally 
a feeble, scarcely serrate, oblique ridge. 
Female: Last dorsal segment broadly rounded at apex, nearly 
truncate; last ventral segment more narrowly rounded at apex; posterior 
femora reaching to the apex of the third, ventral segment, less strongly 
incrassate than in the male, armed below with a rather small tooth and 
behind this occasionally a feeble, oblique ridge. 
This species has been taken in Manitoba (Wallis) and Alberta (Carr) 
on Sagittaria. 
Alberta: Edmonton, July (Carr). 
Manitoba: Aweme and Winnipeg (N. Criddle) ; Winnipeg (Wallis). 
Quebec: Rigaud, July (Ouellet) ; Eustache, August (Ouellet) ; Rouville 
Co., Mt. St. Hilaire (Knab coll.). 
