THE CANADIAN ENTOMOLOGIST. 75 
L 4 
underneath the bark of Hickory trees, and suspected it of making galleries 
under the bark. Dr. Clemens more correctly suspected that it was 
hchenivorous and hoped that Mr. Walsh might ascertain its larval history. 
Alas ! the researches of both have terminated forever. 
Only the male was known to Dr. Clemens, and from his description I 
think his specimen must have been somewhat rubbed. Male, “ Head 
and face dark gray. Antennae dark gray, slight!y spotted with white.” 
Fore wings dark gray at the base, remainder paler, sprinkled irregularly 
with dark spots and scales. Ciliae grayish white. “ Hind wings gray.” 
(The quotations are from Dr. Clemens’ description.) The female is apter- 
ous, with the head clothed with hoary scales and à tuft of the same at the 
apex ; but the body is nearly naked. 47 «x. 34 ich. Kentucky. Com- 
mon. 
The larva feeds upon lichens and may be found in March and April, 
feeding up. It becomes a pupa in April and the imago emerges about a 
week thereafter. The larva is whitish, head black, upper surface of the 
two succeeding segments shining yellowish brown, anteriorly margined 
with white. The case is prismatic in outline, and of an almost leathery 
consistence, about 73 of an inch long, and tapering slightly towards each 
end ; it is composed of silk, sand, particles of lichens, and excrement of 
the larva, and I have sometimes found smai! Molluscous shells adhering to it. 
ON SOME OF OUR COMMON INSECTS. 
IV.—THE ISABELLA TIGER MOTH. 
Pyrrharctia (Spilosoma) Isabella. 
BY W. SAUNDERS, LONDON, CNTARIO. 
There are but few of our readers who are not familiar with the cater- 
pillar of the Isabella Tiger Moth, one of our commonest “ woolly bears,” 
and found, we believe, in almost every part of Canada and the Northern 
United States. This larva, in common with many other members of the 
family (arctiade ) to which it belongs, hybernates during the winter. It 
acquires nearly full growth in the autumn, and then, having selected a cosy 
sheltered spot under bark, log, rail, stone or board in which to hide, it 
