Vorhies—Studies on the Trichoptera of Wisconsin. 685 
Lepidostoma luisconsinensis iiov. sp. 
Imago .—Length of body, 4—5 mm. Expanse, 13-15 mm. 
Antenna? grayish-black above, fulvous beneath with a blackish 
process near the middle of each segment: this process consists 
of an annulation of black scales such as cover the upper surface 
•completely. Head and thorax brown. On the bead, a pair of 
warts within and at the bases of the antennae, another larger 
pair above the eyes extending diagonally back across the head, 
;and a third pair on the sides of the bead behind the eyes; these, 
and two pairs of warts on the prothorax and the wing callosi¬ 
ties, all clothed with long grayish hair. The face of the male 
is deeply concave to receive the maxillary palpi, and the basal 
joints of the antennae are somewhat flattened within. Viewed 
from above, the disk projects somewhat forward between the 
bases of the antennae, and bears a dark longitudinal keel; a 
similar keel on the posterior half of the head of the female, the 
face convex. Abdomen brownish, the body paler beneath. Legs 
yellow, except the first pair more brown. Wings dark gray; an¬ 
terior pair indistinctly and sparsely guttate with yellowish, 
both pairs fringed with dark gray, except lighter near the body 
on the posterior pair. 
In the male only a portion of the 9th dorsal segment is vis¬ 
ible. A pair of appendages (intermediates ?) short, broad, di¬ 
rected downward, with a concave outer face, on which are four 
short spines; ending below in a stout spine directed backward 
and upward. The inferior appendages are long, very hairy, 
nearly straight, directed slightly upward, ending in a beak¬ 
like point; in lateral view a small, club-shaped, ciliate appen¬ 
dage arises from within, near the base; viewed from above when 
dissected off, this inferior appendage is seen to bear three such 
supplementary appendages on its inner concave surface, the 
distal two being invisible from the side. The largest of the 
three corresponds to what McLachlan in L. hirtum says “by a 
stretch of the imagination may be called penis sheaths,” but in 
this species a pair of small pointed pieces lying alongside the 
penis on the dorsal side would certainly better be called the 
penis sheaths. The penis is bifid at the tip. 
