Vol. xxiii] ENTOMOLOGICAL NEWS 19 
a short piece of a very wide blade of grass, and then this piece is fas- 
tened into the case just as are the others which are not “pieced to- 
gether.” 
Habits and Occurrence: Found in small ponds along the 
C. & E. R. R,, Corvallis, Oregon, and in ponds formed by 
the widening of slow-flowing streams. Also in various slow 
streams flowing through meadows. The earliest species to 
emerge in the laboratory, and probably one of the first to do 
so outside, since the larvae are far in advance of the most 
of the others, being nearly ready to pupate in the latter part 
of January and first weeks of February, varying slightly from 
year to year. Pupation occurs in February and the first of 
March, and I have records of emergence of adults March 12, 
14, 15, 20, 21 and 30, and April to. All the adults in the col- 
lection, however, bear dates of September, October and No- 
vember, which suggests two broods, or a very long adult 
life. 
The larvae seem to be restricted as to locality, but quite 
abundant when found at all. The adults are moderately plen- 
tiful, for caddisflies. This is one of the four largest spe- 
cies in the collection of the Oregon Agricultural College at 
Corvallis. Larvae -are difficult to rear inside. They feed on 
water plants, dead and decaying leaves, manure and filth which 
may happen to be in the meadow streams where they live. 
Eggs and oviposition unknown to me. 
Mystacides alafimbriata, n. sp. (Pl. IV). 
Small, black, delicate and graceful, clothed with short black hair. 
Head black, shining, with a few hairs between and below the antennae, 
which are long and filiform; basal fourth annulated with buff; basal 
segment very large in proportion to the antennae, surrounded with 
black hair. Palpi very bristly with black hair. Thorax black and shin- 
ing. Legs grayish-yellow with few small black spines. Abdomen 
dark gray. 
Anterior wing long, rather narrow, rounded at. apex, dusky, cloth- 
ed with short black hairs. The costal area is darker than the remain- 
der. Venation brown. Thyridium and arculus hyaline. Pterostigma 
present. Discoidal cell about the same length as its pedicel. The 
first apical cell is not very long; not so long as the second, in fact. All 
interneural areas extremely long and narrow. 
