Vorhies—Studies on the Trichoptera of Wisconsin. 681 
pupation time were near. However, they invariably fastened 
their cases thus in the aquaria and remained for days in the 
same position, though they did not pupate until late in the 
summer, the adults appearing in August and September. The 
larvse have been obtained from Lake Mendota, along the south 
shore of Picnic Point, and in Devil’s Lake. One adult was 
taken with a beating net from the shrubbery along the lake 
shore on October 5. 
(PL LIT, Fig. 5. PI. LYI, Figs. 5-11.) 
SEKICOSTOMATIDHL 
Helicopsyche borealis Hagen. 
Notidobia borealis Hagen, Syn. Xeur. X. Am., 1861, 271. 
H. glabra Hagen, Stett. Ent. Zeit., 1864, 130. (Case) 
Helicopsyche borealis Hagen, Ent. Mo. Mag., II, 1866, 253. 
McLachlan. Rev. and Syn. Trich., 1876, 238. Banks, Tr. 
Am. Ent. Soc., XIX, 1892, 365; Proc. Ent. Soc. Wash., 
VI, 1904, 212; Cat. Xeur. Ins. IT. S., 1907, 43. Ulmer, 
Gen. Insectorum, Fasc. 60, 1907, 94. 
Imago. —Length of body, 5-6 mm. Expanse, male, 12-13 
mm., female, 16-17 mm. Antennse yellow, darker at the tips; 
the basal article darker, particularly in the males; as seen from 
above in the resting position of the insect they present the form 
of a long Y, as they lie close together through most of their 
length, but curve apart at the tips. Palpi of females dark, of 
males almost black, densely pubescent. Head and thorax 
brownish-black. A pair of large warts above eyes, a large trans¬ 
verse pair on prothorax, a small linear pair and a median pos¬ 
terior one on mesothorax, and the wing callosities, all with lu- 
teous hair. Abdomen not so dark as head and thorax, densely 
covered with long luteous hair. Legs luteous, luteous spurs 
and spines. Anterior wings grayish-fuscous in general color, 
with black and luteous hair, ciliated with black. Posterior 
wings grayish, pubescent, ciliated with grayish-black. In the 
male the superior appendages are represented only by small 
rounded lobes; the intermediate pair appear to be absent (un- 
