42 THE ENTOMOLOGIST. 
information, the synonymy of P. costipunctana with galli- 
colana, as in Doubleday’s list and many German authors, is 
incorrect, Haworth’s insect being a distinct species. 
HEMIPTERA. 
Thrips sp.—These little pests have now been ascertained 
to belong to the order Thysanoptera, separate from Hemiptera, 
Homoptera, and Orthoptera, each of which it resembles in 
some characteristics. 
Aphis sp.—The species bred by Walker was no doubt 
Thelaxes (Vacuna) dryophila, Scik., an oak-frequenting 
species, which feeds on the twigs, leaves, and fruit; it has 
also been found feeding on the substance of these and folii 
galls. No doubt other species of Aphides, now included in 
the genus Homoptera, may be found in and on oak-apples 
occasionally; but T. dryophila is the only species recorded 
as being dependent on them for sustenance, as far as I know. 
Psylla —I am unable to find any true Psylla 
(Homoptera) connected with oak. 
The object 1 have had in view throughout these notes has 
not been so much the embodying of new information as the 
collating of old, to serve as a starting-point for more extended 
and confirmatory observation. The interest of parasitism, 
which affects all orders of insects, is very apparent in the 
“life in an oak-apple.” 
E. A. Fitcu. 
Injury lo Linen in Bleach Fields by the Larve of Arctia 
rubiginosa. By EDwARD NEWMAN. 
[AN application for advice on this subject having been 
made to the Editor of the ‘Field’ newspaper, and having 
been handed me for my opinion, | wrote to Mr. Eccles, from 
whom the application originally came, soliciting further 
information, and asking permission to publish the same. In 
reply I received the following interesting and explicit letter, 
to which I have appended a few observations of my own, 
regretting, however, their insufficiency and incompleteness. 
Sull, however, | think it will not be considered an unim- 
portant step to have ascertained the name and nature of an 
insect that can cause so great an injury, more especially as it 
Le 
