30 



distinct or different from H. opaculus in the Report of the Department 

 of Agriculture for 1878, page 248. 



Mr. Tobias Witmer informs me that " last year this beetle occa- 

 sioned much damage to the clover in Humberstone, Ont., Lan- 

 caster, and other places in Erie county." 



It is likely to prove a serious enemy to agriculture in this locality. 



D. S. K. 



Cossus robiniee. — I am able to add, so far as I know, two new food 

 plants harboring this moth. In the spring of 1880 I obtained larvae 

 and later pupae and imagos from the trunks of Populus candicans in 

 the vicinity of Buffalo. In April last I found the larvae also in the 

 willow (S. ■nigra) in the same locality; from these the moths are 

 now appearing, July 4th. Numerous examples of caterpillars were 

 taken from both trees. Comparing these with Fitch's description 

 {Fifth Report), I find no particular differences, except that the red 

 ones have, as Harris says, " the upper part of the first three rings 

 brown and hard ; " while Fitch mentions the first only as thus cov- 

 ered. Again, Harris (Ins. Inf. to Veg.) says these caterpillars are 

 " soft and whitish," which is not so until after the last moult ; then 

 not trie first three rings, but the first only, is brown above. These 

 larvae are good travelers. A willow log, three feet in length, con- 

 taining at least twenty-five of different sizes, was brought in. After 

 it became dry, in June, the larvae left it, and wandered to consider- 

 able distances from the starting-place. One was found that is now 

 boring with apparent satisfaction in the trunk of a plumb tree ; 

 besides, they were not uncommonly found under the rough bark of 

 the poplars at some distance from their burrows. I have repeatedly 

 captured them while thus on the outside of the trees. In several 

 instances I have found cast larval skins in the crevices. Those 

 from the willow and poplar appear as moths from ten days to two 

 weeks later than those from the locust and oak. D. S. K. 



Papilio Thoas. — Larvae were taken a few miles out of the city in 

 September last, by Mr. Victor M. Witmer. They were feeding on 

 D. fraxinella ; imagos from these, June 2d. Mr. David F. Day, re- 

 siding within the city, has at the present date, July 4th, a number of 



the larvae feeding upon the fraxinella in his garden. 



D. S. K. 



