Vorhies—Studies on the Trichoptera of Wisconsin . 663 
and often dilated on its lower margin, forming an angle (but 
the form varies somewhat, probably partly naturally and partly 
from the effect of desiccation). Tubular piece as long as, or 
slightly longer than, the appendages, open in the middle, above,, 
nearly to the base, reddish, obtuse if viewed from the side, 
hairy. Side-pieces of 9th ventral segment conical. Vulvar 
scale with the median lobe longer than the lateral. A short 
broad triangular tooth on the middle of the 6th ventral segment,, 
and an indication of a similar tooth on the 5th. 
“Length of body, 10-17 mm. Expanse, 31-42 mm. The 
smallest and the largest individuals I have seen are both fe¬ 
males.” 
The above is McLachlan’s description. In examining an al¬ 
coholic individual of our own form I noted that from the inner 
side of the base of the inferior appendages of the male, there 
arises a short flattened branch, the distal end of which is 
rounded off on the outer side, and bears an acute point on the 
inner; this distal part is toothed with sharp brown spines. An 
examination of a European specimen, however, disclosed that 
the same structure is there present also. It is usually drawn 
deeply within the abdomen in dried specimens. 
This species was formerly given a place in our fauna, but 
Mr. Banks does not list it in his latest catalogue (1907). My 
specimens agreed so closely with the above, description, how¬ 
ever, that I wished to test the matter by comparison. I there¬ 
fore sent specimens (all stages) to Mr. Ulmer with a request 
for some European specimens in exchange, and also asked his 
opinion. He very kindly furnished me with exchange speci¬ 
mens and stated that they appeared to be specifically identical.. 
I can find no differences comparable to those usually consid¬ 
ered as specific in the group and therefore list this as a Wis¬ 
consin species which has been reared. I include full descrip¬ 
tions of all stages, not claiming them as original, though those 
of the pupa and larva are not copied. This course seemed ad¬ 
visable for the sake of completeness, and for the convenience of 
American workers who might not find the scattered literature 
available. The drawings are original. 
