708 Wisconsin Academy of Sciences, Arts and Letters. 
Hydropsyche morosa Hagen, Syn. Heur. 1ST. Am., 1861, 287. 
Hydropsyche alternans Hagen, Syn. Neur. JST. Am., 1861, 288. 
McLachlan, Ent. Annual, 1863, 139. Banks, Proc. Ent. 
Soc. Wash., VI, 1904, 214. Ulmer, Gen. Insectorum, Ease. 
60, 1907, 170. 
Imago .—Length of body, 6-7 mm. Expanse, male, 18 mm.; 
female, 20-22 mm. Antennse fuscous, the base broadly annu- 
lated with luteous. Eyes jet black. Head, thorax, and ab¬ 
domen fuscous above, paler, approaching luteous, beneath. Face 
clothed with luteous and fuscous hair. Top of head densely 
clothed with luteous hair on disk, with dark brown on outer 
posterior portion; when denuded, three pairs of warts are vis¬ 
ible, the smallest pair in front and nearest the median line, the 
others progressively larger and farther apart, posteriorly. On 
the prothorax is a large pair of transverse warts, with brown 
hair, and outside of these, a smaller pair with fuscous hair. 
Wing callosities with fuscous hair; a broad median band of 
luteous hair on the mesothorax, including that borne on a 
median posterior wart. Palpi luteo-fuscous. Feet and geni¬ 
talia luteous. Wings densely pubescent, fuscous, densely spotted 
with bright luteous or golden. More conspicuous patches of fus¬ 
cous at middle of inner margin, at the arculus, and at the anal 
angle, with golden between. On a rubbed specimen, luteous de¬ 
scribes the color of the pubescence better than golden, but not 
so on a perfect example. Posterior wings grayish-hyaline, 
darker at the tips, ciliated with same, except luteous at base. 
In the male the 9th dorsal segment is produced into a long 
lobe, notched at the apex, with a pair of small appendages aris¬ 
ing from it near the tip, and with a thickened part at the base, 
above, hearing long hairs. Two rounded lateral plates bearing 
long hairs are said by McLachlan (doubtfullly) to represent the 
superior appendages. The inferior appendages are long, club- 
shaped, directed upward and backward, hairy, ending in narrow 
incurved portions which almost or quite meet at the tips; be¬ 
tween these projects the long penis, its distal end turned up¬ 
ward ; in dorsal view it is seen to be expanded at the end, with 
