91 
bb. Vertex of ordinary width, at least not unu¬ 
sually narrow; pronotum scarcely cylindrical; 
posterior femora not greenish. Similar in form 
and appearance to Caloptenus femur-rubrum / 
elytra not extending beyond the second seg¬ 
ment ( P . scudderi.) 27 
AA. Elytra as long or longer than the abdomen. 
a. Elytra without spots, though sometimes striped. 
b. Without stripes; color of pronotum and elytra 
nearly or quite uniform, varying from olive 
green to olive brown; tip of the male abdomen 
swollen; elytra scarcely longer than the abdo¬ 
men in the female; rather large. (C. differentialis.) 33 
bb. A yellow stripe along tha middle of the dor¬ 
sum but none on the sides; color nearly uni¬ 
form reddish-brown or pale-brown tinged with 
green; elytra sometimes dimly spotted; tip of 
male abdomen not swolen; cerci broad and 
flat. 
c. Elytra pale reddish-brown with more or less of 
an olive shade; distinctly longer than the ab¬ 
domen; sides of the pronotum sparsely sprinkled 
with yellow dots; median carina of the prono¬ 
tum simply a minute line, inner face of pos¬ 
terior tibiae black; large; 1.3 to 1.75. (A. emarginatum. 35 
cc. Elytra and pronotum, in fact the entire in¬ 
sect, almost uniform reddish-brown; pronotum 
arched from the sides, forming a prominent 
median ridge; elytra about as long as the ab¬ 
domen, medium‘size. (A. rubiginosum.) 34 
bbb. A yellow or pale stripe along each side; no 
stripe along the middle; tip of male abdomen 
swollen; general color dull olive or olive- 
brown; size varies from medium to tolerablv 
large. ( C’. bivittatus.) 32 
aa. Elytra distinctly spotted, either with large cel¬ 
lular, fuscous spots scattered over them, or a 
row of quadrate spots along the disk. 
b. Elytra distinctly passing the abdomen; size 
large, female two inches or more in length; 
tip of male abdomen not swollen; elytra mark¬ 
ed with large cellular, fuscous spots on the 
disk and apical portion. (A. americcmum.) 36 
^Ground color reddish-brown. Var. americanum. ) 
**Ground color yellowish. Var. ambiguum. j 
bb. Elytra usually distinctly passing the abdomen, 
and sometimes proportionally very long, some¬ 
times but slightly longer in the female; size 
rather under medium; tip of the male abdo¬ 
men swollen; spots on the elytra rather small, 
in a row along the discal area. 
c. Tip of the sub-anal plate of the male trun¬ 
cate, not notched. ( C . femur-rubrum .) 29 
