TRÎCHOPTERA. 
11 
морфу [P. variabilis m. frigoris ] по остальнымъ 10 экз. съ Полярнаго Урала и 1 экз. 
Сибирскому. 
Black; posterior warts of liead obsolete; pronotum and wings-callosities with golden- 
yellow hairs; bead fuscous anteriorly witli browuisb and reddisb hairs. Antenuae stout, 
fuscous; each joint paler at the base and with blackish raargin at the end. Palpi raaxillares 
stout, testaceous or fuscous; in the $ 3-rd joint slightly curved; in the $ the 4-th joint 
short, 2-nd and 3-rd equal, 5-tli slightly longer; palpi labiales short and stout. 
Coxae blackish fuscous, femora brown fuscous, with paler ends; tibiae yellowish or 
yellowish testaceous with brown markings externally and at the ends; tarsal joints brownish 
at the ends; spines black, spurs reddish. Anterior wings shining, smoky, with brownish 
vittate (in strongly marked individuals) markings in the areas, in the discoidal cell and in 
the basal portions of the apical cells; in the costal, subcostal and radial areas fuscous 
streaks interrupted at the pterostigma; at the thyridium there is ordinarily an irregulär pale 
spot; nervures fuscous, strong, set with erect curved blackish hairs; the same black curved 
hairs, arising from blackish tubercles, are dissemined sparingly on the membrane; postcostal 
area clothed with dense and fine pubescense. Posterior wings pale, smoky hyalin, whithout 
any cloud at the termination of first ap. sectors. Nervation ressembling tliat of PI. nigro- 
vittatus , but often irregulär (fig. 1, 2). 
In the <5 the margin of the 8-th segment regulär; its posterior portion paler and 
clothed with numerous minute blackish hairs (fig. 6). Superior and inferior portions of the 
9-th segment very narrow, lateral ones broad and irregulär, partly fused with the pedcs 
genitales; blackish, the upper posterior portions pale (fig. 4, 5). Ap. praeanales 
(fig. 4—6, ap. prn.) in the form of two subquadrate (seen from side) testaceous plates, 
concave within, fringed with hairs. Append. intermedii (fig. 4, 6) very small, testaceous, 
stickshaped, placed close together, with pale hairs. Basal portion of the pedes genitales 
broad, blackish externally, pale on the under and inner side; distal portion stickshaped, 
slender, directed upward and inward, with acute ends; wholly black. Penis long, slender, 
yellow; titillatores small, spine-like, pale. 
In the $ (fig. 8) tubulär piece(10 segm.) similar in the form to that of PI. nigrovittatus', 
its margin (seen from above) triangularly excised; seen from side the piece is divided into 
two parallel portions; lower portion shorter, truncate at the apex and with a shallow median 
excision if seen from beneath (fig. 8). 8-th segment forms a deep pouch, which is nearly closed 
posteriorly by the posterior lobes of the segment. 
Length of body 9—11 mm.; with wings 12—14 mm. The species is allied to PI. 
nigrovittatus McLach. 
Тѣло черно. Голова спереди коричневата, съ буроватыми и рыжеватыми приле¬ 
жащими волосками; заднихъ бугорковъ сверху не видно. Переднегрудь черная съ золо¬ 
тисто-желтыми отстоящими волосками, каковые находятся и при основаніи крыльевъ. 
Усики довольно толсты, коричневы,или свѣтло-коричневы; основная часть каждаго членика 
2 * 
