THE CANADIAN ENTOMOLOGIST. 127 



The body above is dark dull brown with a slight greenish tint, the second 

 segment being nearly covered above with a horny looking plate, similar in 

 appearance to the head, but a little paler, and edged behind and at the sides 

 with a darker shade — on each side below this plate is a flattened blackish 

 promiuence — on each side of third segment is also placed a small shining 

 black tubercle. On each segment from the third to terminal inclusive, are 

 several very minute blackish dots, from each one of which arises a single pale 

 brown hair. 



The under surface is a little paler than the upper, with a more decided 

 greenish tint, feet green banded and tipped with brownish black, prolegs dull 

 greenish brown. 



It changes to a chrysalis sometimes, and I think usually within the case. 

 I found them thus changed in some cases on the trees, but one or two of 

 the specimens among those brought home and fed, came out of the case, and 

 changed to a pupa on the outside. The chrysalis was about four tenths of an 

 inch long, aud of a reddish brown colour, one specimen was observed to 

 effect its change on the 8th of June, and produced the winged moth on the 

 21st of the same month, showing the duration of the pupa stage to be about 

 thirteen days. 



On examination the moth proved to be the Phycita nebulo, (Walsh) to 

 which he has given the significant common name of l< The Rascal leaf erum- 

 pler." In Mr. Walsh's excellent Report on the noxious insects of Illinois, 

 he states that this larva affects the plum and wild crab as well as the culti- 

 vated apple. The young larvaj appear late in the summer, and construct 

 their little cases, surrounded with portions of dried leaves, in which they pass 

 the winter in a torpid state, awakening to activity and resuming their depre- 

 dations as soon as the young foliage expands in spring. He was of opinion 

 that this insect was confined exclusively to the North Western States, its 

 occurrence in Canada shows that in this his views were incorrect. Although 

 he had bred a number of specimens, he had never found them preyed on by 

 any species of ichneumon fly, whereas in my own case, although I only bred 

 seven or eight, one of them produced an interesting ichneumon, the name of 

 which has not yet been determined. 



The moth is a pretty little thing, its wings measure when expanded, abou 

 seven tenths of an inch. Its fore wings are pale brown, with patches and 

 streaks of silvery white, the hind wings are plain brownish white, the under 

 side of both wings is pale whitish brown, the hind wings paler than the fore 

 wings. It is figured and described by Mr. Walsh, in the Proceedings of the 

 Boston Society of Natural History, vol. 9 p. 312-3. 



