42 
G Sides of elytra very strongly bisinuate, and strongly cuneiform, 
the sides concave from above; punctation very coarse, deep 
and close on basal half, small and shallow behind; pronotal 
pubescence long and pale; colour black throughout. 
(41) atrata Lee. 
GG Sides of elytra moderately bisinuate, the sides from above con- 
verging but straight; punctation as in atrata , but smaller and 
denser at the base; pronotal pubescence short and golden; 
elytra red with the apex black. (42) liebecki Hop. 
FF Pronotum with disk convex between the median sulcus and the 
side margins. 
G Pronotum with the sides strongly angulated at the middle; 
male with the last ventral segment very strongly triangularly 
cleft at the apex; female with the pygidium carinate on the 
middle line towards the apex. (43) proxima Say. 
GG Pronotum with the lateral inflation rounded; male with the 
last ventral segment flattened and subsulcate towards the 
apex; female with pygidium not carinate. 
(44) minnesotana Csy. 
EE Elytra with lateral margins feebly arcuate, not curved dorsally on the 
basal fifth. 
F Disk of pronotum subplanate although distinctly inflated, median 
line feebly broadly impressed; elytral apices obliquely truncate 
and emarginate; antennae serrate. 
G Pronotum very coarsely confluently punctate, densely about 
the median impression, more sparsely on each side, with 
irregular, linear, smooth spaces, pubescence nearly black; 
elytra very coarsely, deeply, sparsely punctured, pubescence 
black, very short and indistinct. (45) canadensis Oliv. 
GG Pronotum uniformly, densely punctate, here and there indis- 
tinctly confluent, pubescence pale brown; elytra rather 
finely, closely punctate, pubescence distinct, recumbent, and 
light brown, (46) planata n. sp. 
FF Disk of pronotum strongly convex, median line strongly impressed; 
elytral apices transversely, narrowly truncate; pubescence of 
pronotum long and golden; elytral pubescence golden; antennse 
not serrate. 
G Elytra densely clothed with bright golden, transverse pubescence, 
punctures minute and very dense. (47) chrysocoma Kby, 
GG Elytra rather sparsely clothed with short, pale, oblique pubes- 
cence, punctures rather coarse at the base and only moder- 
ately close, becoming smaller at the apex; usually with black, 
lateral and sutural vittae. (48) nigrolineata Bland. 
CC Pronotum only margined in front, without wide and deep transverse apical 
impression, the basal transverse impression not abrupt, the disk without an 
impressed median line; the male with the abdomen inflated at the apex, 
and the last ventral segment excavated (except vittata, with last ventral 
feebly impressed). 
D Antennse annulated, except rarely indistinctly so in dehiscens Lee.; elytra 
strongly dehiscent at apex, except feebly so in circumdata Oliv. ( Brachy - 
leplura Csy.) 
E Pronotum with a strong carina extending from the apex at the dorso- 
lateral margin diagonally towards the coxse, giving the pronotum a 
subquadrate appearance as viewed from above; elytra distinctly 
more than twice as long as wide, obliquely truncate or emarginate 
at the apices, the sides strongly sinuate, ferruginous, usually opaque, 
moderately to coarsely and rather sparsely punctured; tempora very 
short, obliquely arcuate. (49) rubrica Say. 
EE Pronotum with sides narrowed regularly from middle to apex; without 
the diagonal carina described above. 
F Elytra with apices strongly dehiscent. 
G Tempora inflated, abruptly constricted and subangulate behind 
the eyes; elytra densely, finely punctured, ferruginous, the 
sides feebly sinuate. (50) dehiscens Lee. 
