+ 
Che Canadian Entomologist. 
VOI, NV: LONDON, ONT., AUGUST, 1873. No.8 
ON SOME OF OUR COMMON INSECTS. 
7. THE FALL WEB-WORM—fAyphantria textor, Harris. 
BY THE EDITOR. 
Though extremely abundant and very destructive throughout the 
whole of this Province, and in the neighboring Northern and Middle 
Big 10; States, this insect (fig. 16) is very 
commonly confounded with the 
equally abundant and noxious 
Tent Caterpillars ( Clsiocampa 
Americana and Sylvatica, Harris ) 
see fig. 17. This confusion 
arises solely from the fact that 
all three species spin large webs 
+ upon the trees they infest, and 
Ei i il i therefore, without further obser- 
vation, it is . for canted that they are one and the same. We feel 
no surprise at a mistake being made between the two species of Tent 
Caterpillars, as they closely resemble each other in many respects; but 
the Fall Web-worm differs from both in almost every particular. For 
instance, the former are hatched from the egg-bracelets very early in the 
spring before the apple leaves are fully expanded, and very soon spin in 
the fork of a limb, or upon the side of the trunk, their thick, silvery 
white, cobweb-like ‘tent;’ the latter do not appear till the month of 
August, when they form a Genre: dirty-coloured web over the end 
of a bough. Were the web and the ‘tent’ at once upon the same tree 
there would be no difficulty in distinguishing between them, but few bear 
