September, 1942 
three spots on posterior margin. Head 
without a transverse occipital ridge on 
posterior margin between compound eyes. 
} 
.s 4 
¢—  NYMPHAL MANDIBLES —~ 
NYMPHAL LABIUM 
Fig. 43.— 
Acroneuria 
filicis. 
Maxilla, labium and mandibles as in fig. 
43. Anal gills present at apex of abdomen, 
Approximately full grown female nymph 
25 mm. and male somewhat smaller. 
This nymph in general resembles the 
nymphs of evoluta Klapalek (= arida of 
Frison 1935a), perplexa Frison and mela 
Frison, having in common with them anal 
gills. Differences in color pattern which 
seem to have taxonomic significance are 
as follows: (1) In evoluta (Frison 19354; 
fig. 313) the pale yellow color of the head 
behind the ocelli tends to invade the space 
between the ocelli and compound eyes; the 
transverse dark bands of the abdominal 
fergites are usually confined to the an- 
terior half of each tergite; and the trans- 
verse band on head anterior to median 
vcellus is more bandlike and less W- 
haped. (2) In mela (Frison 1935, etie: 
316) the abdominal tergites are almost 
ntirely dark, and three light spots, in- 
tead of a W-shaped transverse band, are 
resent on the head anterior to the median 
cellus. (3) In perplexa (Frison 1937, 
ig. 66) the dark markings on the ab- 
lominal tergites are mostly on the anterior 
alf of each tergite and decrease in width 
lear lateral margins, and the W-shaped 
nark on the head is less broad throughout. 
Frison: NorrH AMERICAN PLECOPTERA 
ded 
Nymphal and exuvial records are as fol- 
lows. 
Nortu Caro.ina.—East fork of Tuckasee- 
gee River, JAcKson County: pune 19519300 1) 
Howell, 1 nymph. Briowrnc Rock MounrTAIN: 
March 23, 1940, T. H. Frison, C. O. Mohr & 
A. 8. Hawkins, 1 nymph. 
‘TENNESSEE.—OZONE: June 11, 1935; H. H: 
Ross, 1 exuvia. GATLINBURG, Le Conte Creek: 
June 135919330 a HPrison eet oH. Frison, 
Jr., 2 nymphs; June 18, 1933590.) Heeb rison & 
Mor Hattison es) reat exuvia; June 14, 1940, T. 
H. Frison et al., 2 exuviae (adult ¢ reared 
from 1 exuvia). 
Acroneuria xanthenes (Newman) 
Perla xanthenes Newman (1338a5-p2.178);, 
Original description, Cone 
Acroneuria brevicauda Klapalek (1909, p. 
245). Original description, ¢ (at least in 
part). Synonym. 
Acroneuria xanthenes Needham & Claassen 
(1925, p. 194). Female suggested as type with- 
out definite lectotypic designation. 
Acroneuria xanthenes Ricker (1938, p. 140). 
Accepts female as lectotype and erroneously 
records typic male as Togoperla kansensts 
(Banks). 
Eccoptura xanthenes Klapalek (19234, p. 
63). Notes on types. 
Although few records have been given 
for this species in literature, it has acquired 
a rather snarled and complicated bibliog- 
raphy. It is clearly evident from Klapalek’s 
(1923a) illustrations of the two speci- 
mens, male and female, in the British Mu- 
seum, accepted as the types, and Ricker’s 
(1938) notes, that the male and female of 
the typic series represent two different 
species. This fact was first pointed out 
by Needham & Claassen (1925), and they 
suggested that the female be considered as 
the type because of its unique character, 
and that less confusion would then result. 
Ricker (1938) considers that Needham & 
Claassen (1925) designated the female as 
a “lectotype,” but since no definite desig- 
nation of a single type was made in this 
connection by Needham & Claassen, | 
herewith definitely designate the female of 
Newman’s typic series of a male and fe- 
male as the lectotype, and I select the 
female for the same reasons as those ad- 
vanced by Needham & Claassen. 
Ricker (1938) makes the additional 
statement that “Dr. Claassen identified the 
3 as Togoperla kansensis Banks.” I can- 
not accept this placement of the typic 
male because Klapdlek (1923a) clearly 
recognized kansensis as a distinct species, 
gave figures of kansensis which differ radi- 
cally from the typic male he figured as 
