September, 1942 
quoting Smith’s original description of 
vagans, reference to this feature was omit- 
ted when they quoted the original descrip- 
tion of Smith for aurea, although the lat- 
ter description contains such a statement. 
In the Illinois Natural History Survey 
collection are two nymphs from Rogue 
River, Ore., Sept. 29, 1932, collector, R. 
E. Dimick, which have five pairs of gills 
located as in the adult of aurea, and hence 
I consider them to be of this species. 
Records for the distribution of this species 
based upon Illinois Natural History Survey 
material, or the identification of specimens for 
others, are as follows. 
OREGON.—CorVALLis, Alsea River: April 2 
1939, Davidson, 19. Near Lacomp, Roaring 
River: March 20, 1934, R. Dimick, 1g. Park- 
DALE, east fork of Mount Hood River: May 
2, 1934, R. Dimick, 16. Rocue River, 1,780 
feet elevation: Sept. 29, LZ Dimick,. 2 
nymphs. TILLAMOOK: March 20, 1934, Joe 
Schuh, 14. 
WASHINGTON.—EastTon: April 17, 1934, G. 
moppe, 86, 29; April 25, 1934, G. Hoppe, 
eo . 
Perlodes dolobrata (Smith) 
Protarcys dolobrata Smith (1917, p. 469). 
Original description, 9. 
Perlodes dolobrata Needham & Claassen 
(1925, p. 52). Description, ¢. 
I have not studied the typic female, in 
the Academy of Natural Sciences of Phila- 
delphia, and described without locality 
data, and full information regarding actu- 
al number of pairs of gills is not given 
in the original description. The descrip- 
tion does indicate, however, that thoracic 
gills are present, and it is a safe assump- 
tion that submental gills are present, there- 
by making Smith’s key to Protarcys in- 
decisive. 
Needham & Claassen (1925), apparent- 
ly on the basis of wing venation, described 
a male from “Glacier Peak and Lake 
Chelan Dist.” as the “neallotype.” This 
LATERAL 
STYLET 
/ 
“ 
S 
Peery Ms ty RR ti Ae 5%, 
SB ABDOMINAL TERGITE 
SUPRA-ANAL PROCESS <ALL 
Fig. 57.—Perlodes dolobrata. 
Frison: NortH AMERICAN PLECOPTERA 
289 
specimen, in the Cornell University col- 
lection, has a pair of submental gills and — 
at least one thoracic pair (number of pairs 
doubtful because of poor condition of speci- 
men). Since these authors did not figure 
the important genital structures of this 
male, I am presenting illustrations of the 
terminal abdominal tergites, as viewed 
from above, and a view of the supra-anal 
process and flanking lateral stylets, fig. 57. 
Whether this male is correctly associated 
with its female remains to be established 
by future collections. 
Perlodes tibialis Banks 
Perlodes tibialis Banks (1914, p. 608). Orig- 
inal description, @. 
Protarcys bradleyi Smith (19 Tp 4 70 a 
Original description, ¢, 9. New synonymy. 
The type of tibialis is a male OME CHS, 
No. 11,309) and is from “Olympia Mts., 
W ash.” A’ study of this male reveals 4t 
has a pair of submental gills and two pairs 
of gills on the sides of the thorax as Smith 
(1917) described for Protarcys bradleyi. 
For some reason, Smith (1917) in her 
account of the North American species 
Big. 58.— 
Perlodes 
tibialis. 
Q SUBGENITAL PLATE 
of Perlodes failed to include any reference 
to the two species of Perlodes, tibialis 
and slossonae, described by Banks in 1914. 
In the Illinois Natural History Survey 
collection is a male of tibialis from Fish 
Lake, British Columbia, July 23, 1908, 
which agrees in structural details with the 
type, and a female with the same data 
which agrees with the male in gill arrange- 
ment. It is my belief that these two speci- 
mens of opposite sex are of the same spe- 
cies. A study of the holotypic male and 
allotypic female of Protarcys bradley 
Smith (C.U. No. 1,135) reveals that the 
allotype of bradleyi, fig. 58, from “Rogers 
Pass, B. ©., August 7; 1908,” is identical 
with the female in the Survey collection 
I consider to be the heretofore unknown 
female of ¢ibialis. In general the holo- 
typic specimen agrees with the allotype, 
and the gill arrangement is identical. Un- 
