114 THOMAS SAY FOUNDATION 
pads prominent; front ones of the male somewhat overlapping the 
hind ones, while in the mature female nymph the front ones may 
extend as far as the posterior margin of the metanotum; hind 
wing pads broadly triangular. Abdomen cylindrical and some- 
what hairy; tenth tergite of male produced into a short, triangu- 
lar tubercle which is directed slightly upwards, and no longer 
than the ninth tergite. Cerci made up of about thirty segments, 
each segment terminating in a whorl of hairs. 
Positive identification is possible only in mature nymphs in 
which the genital structures may be noted. 
Ithaca, N.Y.; Oakwood, Il. 
Allocapnia granulata Claassen 
Length of body up to 8 mm.; antennae up to 4.8 mm.; cerci 
up to 3.8 mm. 
General color ight to darker brown. 
Head as wide as or slightly wider than pronotum; hind oeelli 
about twice as close to the eyes as to each other; antennae of 
about forty-five segments. 
Pronotum widened posteriorly, hairy, angles broadly rounded ; 
anterior marginal groove distinct but shallow. Wing pads present 
in both male and female, but larger and more fully developed in 
the female. In the mature males the front wing pads overlap 
the hind wing pads only slightly, while in the females the front 
wing pads may extend back as far as the middle of the hind wing 
pads. 
Abdomen cylindrical; cerci composed of about thirty segments, 
each of the segments ending in a whorl of hairs. Tenth abdominal 
tergite of male produced into a prominent protuberance which 
is longer than in A. recta but not quite as long as in A. pygmaea; 
in side view the protuberance, as measured from the base of 
the cereus to the apex, is longer than the ninth tergite, and is 
directed slightly upwards. The mouth parts are similar in struc- 
ture to those of A. pygmaea. 
Allocapnia vivipara Claassen 
Length of body up to 8.5 mm.; antennae up to 4 mm.; cerci 
up to 3.4 mm. 
The nymphal males of this species are readily recognized by 
the absence of wing pads. 
General color brown with the appendages somewhat lighter 
in color. 
Head slightly wider than pronotum; surface quite smooth, with 
