dd. Head unarmed below or armed with a simple spine; rarely with a subfurcate spine at the side of the base. Carolina, Missouri and south. Stenopoda, Schumannia, Diaditus, Narvesus, Oncocephalus
cc. Anal areole of membrane extending farther proximad than the costal areole.
d. Ocelli farther apart than the eyes. A. crassipes, widely distributed in the United States; other species occur in the southwest. Apiomerus Hahn.
dd. Ocelli not so far apart as the eyes. Zelinæ
e. Sides of mesosternum without a tubercle or fold in front.
f. Fore femur as long as or longer than the hind femur; first segment of the beak much shorter than the second. Z. audax, in the north eastern states; other species south and west. Zelus Fabr.
ff. Fore femur shorter than the hind femur, rarely of equal length, in this case the first segment of the beak as long or longer than the second.
g. First segment of the beak shorter than the second; fore femur a little shorter than the hind femur; the first segment of the beak distinctly longer than the head before the eyes. P. cinctus a widely distributed species ([fig. 160]). P. punctipes, P. spinicollis, Cal., Mex. (= Milyas) Pselliopus Berg.
gg. First segment of the beak as long or longer than the second.
h. Pronotum armed with spines on the disc.