340 
eyes than width of pronotum; median 
ocellus located about on a line with an- 
terior margins of compound eyes, lateral 
ocelli located well anterior to a line con- 
necting posterior margins of compound 
EE a aE ae 
BG ie Te fps 
aS ay ‘1 lied : 
Q SUBGENITAL PLATE A | ' | : - | 
(\INeteaoe over oe 
otk ADULT HEAD 
PA AND PRONOTUM 
ABDOMINAL 
TERGITES 
G ABDOMINAL SEGMENTS 
Fig. 119.—Chloroperla terna. 
eyes, distance between lateral ocelli great- 
er than distance between lateral ocellus 
and adjacent compound eye. 
Pronotum much wider than long; later- 
al margins bordered with a wide black 
or a fuscous line, fig. 119. Legs yellow- 
ish green, except for fuscous tarsal seg- 
ments, 
Dorsum of abdomen with a median 
longitudinal series of fuscous spots form- 
ing a line from first to eighth tergite and 
with a shorter fuscous line on the lateral 
margins of the first three basal segments, 
fig. 119; supra-anal process or hook very 
small, dark colored at tip, shaped as in 
fig. 119, and but slightly inset or recessed 
on tenth tergite; seventh sternite with a 
small lobe in middle of posterior mar- 
gin, fig. 119. Cerci short, composed of 
Ittinois NaturAL History SurvEY BULLETIN 
V ol. 22, Artag 
7 to 8 segments several times longer than 
wide. 
Wings extending well beyond tip of 
abdomen; with membrane and veins pale; 
a small anal lobe on hindwing, fig. 116; 
forewing with venation as in fig. 116. 
Length to tip of wings 6 mm.; length — 
to tip of abdomen 4 mm. 
FEMALE. — Head, thorax, basal seg- 
ments of abdomen and appendages in gen- 
eral similar to those of male but slightly 
larger in size. Differs in having eighth 
abdominal sternite with a slightly pro- 
duced, rounded subgenital plate, fig. 119. 
Holotype, male—West Topsham, Waits 
River, Vt.: June 21, 1941, 1. af Frison & 
H. H. Ross. 
Allotype, female—Same data as for holo- 
type. 
Paratypes——New YorkK.—Small creek 3 miles 
west of KEENE: June 20, 1941, T. H. Frisonm 
& H. H. Ross, 1¢. Eusa Mitts, Adirondack 
State Park: June 20, 1941, T. H. Frison & 
Ho HeRossalee 
TENNESSEE.—ELKMONT, Little Pigeon River: 
May 14, 1939, T. H. Frison & H. H. Ross, 
1s 
This minute species is particularly in- 
teresting since it resembles in color Hasta- 
perla orpha (Frison) but structurally is 
best placed in the genus Chloroperla as 
defined by Kimmins (1936). The chief 
difference that I note between this new 
species in the male and Chloroperla tri- 
punctata (Scopoli), the genotype, is the 
small lobe on the posterior margin of the 
seventh abdominal sternite. It differs from 
species of Hastaperla and Alloperla as in- 
dicated in the key to the adults of Chloro- 
perlidae. 
Hastaperla brevis (Banks) 
Chloroperla brevis Banks (1895, p. 314). 
Original description. 
Isopteryx cydippe Hagen (1861, p. 
Misidentification. 
Chloroperla cydippe Needham & Claassen 
(1925, p. 128). 
Chloroperla cydippe Frison (1935a, p. 431). 
In 1935, I included brevis under the 
name Chloroperla cydippe Newman, as 4 
species likely to be found in Illinois be- 
cause of its occurrence in Indiana just 
a few miles from the boundary line be- 
tween these two states. In 1938, this spe- 
cies was first actually collected in Illinois — 
and therefore is now to be definitely in- 
cluded in the faunal list of this state. 
The illustration of the nymph (Frison 
31)3 
