September, 1942 
ocelli about the same as distance from a 
lateral ocellus to inner margin of com- 
pound eye; no. occipital ridge; labium, 
maxillae and mandibles as in eal ale 
“a ‘ ee 
Fig. 122—Nymph of Alloperla caudata. 
Pronotum suboval, much wider than 
long. Wing pads on mesonotum and met- 
anotum with lateral margins broadly 
rounded. 
Gills entirely lacking. 
New distributional records for this species, 
Tepresented by material in the Illinois Natural 
History Survey collection, are as follows. 
ILLINoIs.—La Rue, near McCann School: 
May 26, 1938, B. D. Burks & G. T. Riegel, 
1g. Hutchin’s Creek, near Wor LAKE: May 
12, 1939, B. D. Burks & G. T. Riegel, 1 exuvia; 
Frison: NorrH AMERICAN PLECOPTERA 
343 
NinveetS,0'25)03 15019400 ClO eMonen& Be): 
Burks, 6 ¢, 9 9, nymphs and exuviae. 
ARKANSAS.—MOUNTAIN PINE: June 5.1937. 
Ful Ross asic kG O° Kings River, EurREKA 
SPRINGS: May 8, 1938, M. W. Oe Oe 
OKLAHOMA.—FLINT: June (re tora EEE gt 
Pade Une L991 9375 Standish-Kaiser, sO 
Alloperla banksi new species 
Alloperla nanina Needham & Claassen 
(1925, p. 126). Misidentification. 
Alloperla nanina Frison (19350 paes4l 
Misidentification of Needham & Claassen sug- 
gested. 
Under the discussion of nanina Banks 
attention is directed to the fact that Need- 
ham & Claassen (1925) misidentified 
nanina. This I first suggested G1935a)) 
when I stated, “That there is another 
unnamed species without a dark dorsal 
abdominal stripe now going under the 
name of nanina is evident from the de- 
scription of Needham and_ Claassen 
(1925) and the collection of such a fe- 
male specimen by the author at Caroline, 
New York, in August, 1928.” At that 
time, I further stated, “Action in pro- 
posing a name for these specimens with- 
out a dark dorsal abdominal stripe, now 
confused with nanina, is delayed pending 
the study of further material.” Addi- 
tional material of this species has now 
been collected and studied, and the time 
has arrived for actual naming and recog- 
nition of this species. 
Mare.—Head, thorax, abdomen, cerci, 
basal segments of antennae and legs in 
general a pale yellowish green. Ocelli and 
compound eyes black. No gill remnants 
present. 
Head slightly wider through compound 
eyes than width of pronotum; median 
ocellus located about on line with anterior 
margins of compound eyes, lateral ocelli 
located well anterior to line connecting 
posterior margins of compound eyes, dis- 
tance between lateral ocelli greater than 
distance between a lateral ocellus and 
adjacent compound eye. 
Pronotum much wider than long, angles 
rounded. 
Dorsum of abdomen without a dark, 
dorsal, median stripe. Supra-anal process 
small, inset in cleft of tenth tergite, fig. 
123; basal portion membranous and pale 
colored; small recurved tip, fig. 123, more 
sclerotized and brownish in color. Eighth 
and ninth tergites without raised ridges. 
