10 THE CANADIAN ENTOMOLOGIST. 



c. Elytra scarcely explanate at sides, middle coxae separated. 



Elytra convex, coarsely punctate ; thorax more or less shin- 

 ing, spotted indistinctly if at all. .14-. 26 

 in aniericaiia, Fabr. 



Elytra less convex, more closely and less coarsely punctate, 

 thorax opaque with three spots. .20-. 24 



in sexvitiata, Lee. 



cc. Elytra distinctly explanate, middle coxae contiguous. 



Sutural vitta joined by next at or behind the 



middle. ,14-20 in notidata, Fabr. 



Vitta next to the sutural very short, basal. .14-. 20 



in notata, Fabr. 



bb. Elytra not vittate, often with lighter side margin. 



d. Form convex, elytra coarsely punctate aviericana, var. 



dd. Form not notably convex. 



e. Middle coxas separated, thorax angulate at middle, sub- 

 sinuate behind, hind angles obtuse. .18-24 



in nymphceiB, Linn. 



ee. Middle coxae contiguous, hind angles of thorax distinct. 



Thorax coarsely, not very closely, \>\x\\z'^dXQ...notulata, var. 

 Thorax densely punctured and opaque. .18-. 2 2 



in decora^ Say. 



MoNoxiA, Lee. 

 M. consputa, Lee. (giittulata), has been recorded on the Society's 

 list. It is a small insect, .14-.18 in. long, of a somewhat oblong form, 

 resembling some Ga/eruceilce, but with shorter antenna? ; yellowish or 

 reddish-yellow in colour, elytra often with numerous very small black 

 spots. It is common on the plains to the westward, but I have seen no 

 specimens from Ontario or Quebec, and it is just possible that an 

 immaculate specimen of Galerucella notulata has been mistaken for it. 



DiABROTiCA, Chevr, 

 Here belongs the striped cucumber beetle ( D. vittata, Fabr., Fig. 

 i), so common on and often injurious to cucumber and 

 squash vines. It is a little less than one-fourth of an inch in 

 length, yellow above ; head, scutellum, and three elytral 

 stripes (one common sutural, one discal on each wing-cover) 

 black. Basal joints of antennae partially yellowish, legs with *'°" '• 

 dark tarsi and knees, front tibiae and tips of middle and hind tibise also 



