104 THOMAS SAY FOUNDATION 
direct line with the center of the compound eyes. In the lighter 
specimens, the ocelli are readily seen because of the small darker 
markings inside of the ocelli. Antennae long and slender, with 
about eighty segments. 
Pronotum a little wider than long, with rounded angles; sides 
somewhat convex; front margin shghtly concave in the center; 
surface quite rugose; brown or black in color, with the lateral 
margins yellowish, and in most specimens with a distinct yellow 
median line, or else a slight indication of one. Meso- and meta- 
notum yellowish brown or darker, smoother than pronotum ; meso- 
thoracic wing pads diverge from the body at an angle of about 
thirty degrees, with the outer margins nearly straight; the hind 
wing pads diverge more from the body than do the front wing 
ones, so that the posterior margin is almost at right angles to the 
long axis of the body, especially noticeable in mature nymphs. 
Legs slightly flattened, somewhat hairy; outer margins of the 
tibiae with a sparse fringe of long fine hairs; first and second 
tarsal segments subequal, the two together about as long as the 
third segment. 
Abdomen nearly cylindrical; surface covered with very short 
brown spinules; basal half of each segment usually darker than 
the distal half, and in most specimens the median line is very 
noticeable; cerci brown at the base, becoming lighter towards 
the tip. 
Gills. There are three pairs of gills attached to the coxae on 
the inner base of the legs and they are made up of three segments, 
the basal largest, and the following two segments successively 
smaller. These gills are telescopic, and when fully extended they 
reach to about the middle of the femora. 
In the more mature nymphs the sexes can readily be differen- 
tiated. In the male, the supra-anal process projects beyond the 
posterior margin, of the tenth tergite in the form of a slightly 
upturned, short knob and the ventral lobe of the ninth sternite 
is often plainly visible through the integument. In the female 
nymph the tenth tergite terminates in a flattened rounded pro- 
longation. 
Ithaca, N.Y.; Clinton, N.Y.; Illinois. 
Taeniopteryx maura Pictet 
Length of body up to 10 mm.; antennae up to 7.5 mm.; cerci _ 
up to 6 mm. 
General color yellowish with brown markings. 
