428 THE ENTOMOLOGIST. 
This variety is by no means very uncommon, but I have 
never taken a specimen, and should much value it. 
Chelifer cancroides.—By this post I forward you a singular 
little animal, which I found clinging to a common house-fly. 
Whether it had fixed itself to the body or legs of the fly I 
am unable to say, as it dropped off before I could notice. 
Can you tell me its name, or any of its habits? I never 
recollect seeing it before—Hdward F. Bisshopp; Berners 
Street, Ipswich, September 4, 1871. 
The little animal is Chelifer cancroides. 
Gall on the Poplar.—--The swelling on the leaf-stalk of the 
poplar, sent me by Mr. E. A. Fitch, is caused by a plant- 
louse, Aphis bursaria; if it is opened the interior will be 
found to be nearly filled with these insects. These 
monstrosities are very common just now. 
Argulus foliaceus.—The fish parasite, sent by Mr. Fitch, is 
Argulus foliaceus, already figured at p. 351 of the ‘ Entomo- 
logist.”.. Mr. Fitch has observed that gold-fish dash about to 
avoid their attacks, and that when the Argulus has once 
fixed itself they immediately sicken, and _ eventually 
die. 
Gall in the Bramble.-—Mr. Walker has seen the bramble- 
gall, sent by Mr. E. A. Fitch; and the insect which has 
emerged he pronounces to be parasitic, and of the genus 
Eurytoma.- | am unable to give you the name of the gall- 
maker, but hope to ascertain. 
Cocoon of Orgyia antiqua.—The mass of eggs, sent by 
Mr. Wrench, is laid by the apterous female of Orgyia antiqua 
(the vapourer moth), which, after leaving the chrysalis, crawls 
on the outside of the cocoon, receives impregnation, and lays 
its eggs in this regular manner. After which it perishes, 
I believe, never leaving the exterior of the cocoon. 
Orgyia pudibunda.—On the 24th of May last I took a 
female pudibunda: she deposited a large number of eggs, 
which were good hatchers. On the 16th of August they 
spun up: and on the 26th of same month the perfect 
insect made its appearance; and since then about a 
dozen have come out. I don’t know whether this is a 
common occurrence ; but the books say the following May, 
after spinning, is the time to expect it.—H. Karl; New- 
castle, Staffordshire, September 25, 1871. 
