140 Rev. A. E. Eaton on 
dense shaggy hair. Wings linear lanceolate acute, ^^A\\\ 
very long fringes ; the anterior scabrous, Avith a short 
appendage to the post-costa near the base ; discoidal cell 
open, the anterior branch of the ramus discoidalis simple, 
the posterior forked with the anterior prong simple, tlie 
posterior prong forked ; the su]3erior branch of the ramus 
thyrifer forked, -with the anterior prong forked, the pos- 
terior prong simple ; thus there is one fork before and 
behind the apex ; the posterior wings with adpressed hair, 
the costa shallowly concave just before the middle, and 
one transverse veinlet ; the ramus discoidalis forked with 
the anterior prong simple, the posterior prong forked ; the 
ramus subdiscoidalis forked with simple prongs; thus 
there is one fork before the apex. Legs of moderate 
length, the posterior tibins pinnately fringed ; anterior 
tibiae spurless, the intermediate with three, the posterior 
with four spurs. Abdomen with short stout appendices, . 
the ventral process of the antepenultimate segment slender, 
penis concealed. 
The only English species known is found in running 
water. JNIr. INI'Lachlan's collection contains a species 
from Hungary. 
Ithytrichia lamellaris, nov. sp. 
PI. II. 3, neuration $ ; III. 6—6 b, genitalia $. 
? //. hrunneicornis , Pict. 1834. 
Head and prothorax with tow-coloured hair, frons with 
blackish hair ; palpi smoky white ; antenna3 Avhitish-yellow, 
the last seven or eight joints blackish. Anterior wings 
black with yellowish-white markings, viz. : some longitu- 
dinal streaks near the base ; an irregular angulated fiscia 
before the middle which is enlaro-ed in the frino;es of the 
inner margin ; this is followed by a dot in the middle of 
the disk ; this is succeeded by a conspicuous pair of oppo- 
site spots, of which the costal spot is the larger and is 
followed by one or two irregular and indistinct dots on the 
edge of the disk and on the longitudinal nervures ; these 
are succeeded by the edging of the extreme tip of the 
disk ; fringes black with a purplish gloss; posterior wings 
black or dark gray. Legs testaceous with glossy hair, the 
femora darker. Abdomen blackish; appendices su])eriores 
stout, flattened, with the points tin-ned in like a hooked 
claw ; diu'ing life when viewed in air they appear to be a 
membraneous lobe above the penis (hence the name). 
