32 THOMAS SAY FOUNDATION 
angle; antennal plate more prominent that in proteus and biloba, 
but with the outer angles broadly rounded ; antennae brown, with 
about seventy segments. 
Prothorax much broader than long, widened posteriorly ; front 
margin nearly straight, hind margin convex; front angles pro- 
duced laterally, but rather bluntly pointed ; hind angles also some- 
what produced. Legs stout; femur, tibia, and tarsus fringed with 
hairs. Wing pads broadly rounded at tip. 
Abdomen eylindrie, brown, but with lighter markings, in some 
specimens so pronounced that the abdomen presents a striped 
appearance. The caudal end of the abdomen differs greatly in 
the sexes. In the female, the last tergite ends in a triangular 
conical process which is only shghtly upturned. In the male, the 
tenth tergite is produced into a large process which turns down- 
ward and ends in asmall tubercle; ninth sternite broadly rounded 
and produced considerably beyond tenth sternite. The cerei are 
long and composed of some forty-five segments. 
Spring Creek, Seminole Co., Ga.; Alma, Wis.; White Pigeon, 
Mich.; Otter R., Portage Co., Mich.; Washington, D.C.; Sweet- 
water Branch, Fla.; Fairport, Iowa. 
Pteronarcys californica Newport 
(Plate 1, figs. 6-10; plate 11, figs. 175-176; plate 34, fig. 233.) 
Length of body up to 50 mm.; antennae up to 22 mm.; cerei 
UDsosidemme: 
Color dark brown, sometimes with lighter spots on thorax and 
abdomen, and in some specimens the abdomen with longitudinal 
lighter stripes. 
Head much narrower than pronotum, brown, with smooth, 
round areas on each side of ocellar triangle; occiput corrugated, 
antennal plate large with the posterior angles produced into a 
sharp process. Antennae brown, of about seventy segments. 
Pronotum much wider than long; front margin slightly con- 
vex; hind margin very convex; widened posteriorly, and with all 
four angles produced laterally into a long, upeurved, pointed 
processes; discs somewhat rugose. Fore and hind wing pads tri- 
angular and sharply pointed. Femur, tibia, and tarsus each with 
a thick fringe of hairs. 
Abdomen cylindric, the sexes very distinct in the mature 
nymphs. In the female, the tenth tergite is produced into a 
long triangular conical process which turns upward at the tip. 
In the male, the tenth tergite is very large, humped up and 
