
160 NATURAL HISTORY MISCELLANY. 
long, when the shrike flew to the tree, and after eating off a small 
piece, again flew away. I saw this repeated next day, but by this time 
watched several times, he did not return to it. Since then I have often 
seen them return to lizards and tree toads which they had empaled. — H. 
S. GEebNEY, Potsdam, N. Y. 
Case WonMs.— Every dabbler in pools is nM with the singular 
Caddis or Case-worms, which walk over the bottom like moving sticks, 
or à mass of animated sawdust, or minute peb ipm when the Be is 
Fig. 32. composed of either of those substances. The most puz- 
zling form is that which we here fete (Fig. 32), rdi 
from a correspondent in the Middle States. It is a species 
of Helicopsyche, and was by s conchologists (I. Lea, 
Transactions American En asain ponar 1834, p. 101) 
thought to be a fresh-water shell (Valvata). It is extremely interesting 
as repeating among the aquatic neuropterous larvæ the form of the snail- 
peo terrestrial larva of Psyche helix, a moth. 
arding these cases, Dr. Hagen writes us as follows: « Phryganeid 
cases iie those sent, are described by me in the d Entro E 
Zeitung, 1864, p. 130, as Helicopsyche gine Hagen, from a specimen Tê- 
ceived from the collections of Prof. Dunker, ae Valvata arenifera 
Lea, North America. The Valvata drenifirà Lea, from Tennessee, 
berland River, near Nashville, seems different, and my specimens de- 
scribed (Zeitung, p. 129, No. 8) from Mexico, are perhaps identical. 
** H. glabra is mentioned in a ‘Note on Certain a larva-sacks, de- 
scribed as species of Valvata” (from Troy, N. Y.) by Th. Bland, Lye- 
Nat. Hist., New York, Vol. 8, p. 144, and the case Mt the parts O 
broken imago were identified by me and described in the Entomologist's 
Monthly Magazine, Vol. II, p. 252, and Stettin Entomologische Zeitung, 
1866, p. 244. 'The cases are identical with my raae glabra, and 
the imago with my rages —e Synopsis of North American Neu- 

e 
lum of the case. The description of the larva would be very interesting 
Perhaps you will find an a animal, to judge from its manner of 
living in.a trochiform sack. I think this would be the first asymmetrical 
larva among the hexapodous insects 
* Among the described Am eag Phryganeidæ, I have no doubt that 
Notidobia lutea Hagen, pertains to Helicopsyche. Brauer has described 
ned pet an asymmetrical posture would be observed in the living larv 
: , 1865, p. 205, Ihave given 4 ist i 
: of the described American -molluscan apenteey pertaining to the Helicop- — 







