Chapter IX. 
INSECTS INJURIOUS TO THE WILD CHERRY, WILD PLUM, THE 
THORN, CRAB APPLE, AND MOUNTAIN ASH. 
Although only comparatively few species of insects have as yet been 
found to prey upon the wild cherry, on the wild plum, on the thorn and 
wild apple, so that they are not subject to very considerable injury, 
yet these trees are the original food-plants of a large proportion of 
those which ravage our orchards, and particularly infest the apple, 
cherry, pear, etc. We have paid but little attention to the insects 
feeding on these trees, since they are of little consequence as shade or 
ornamental shrubs or trees, and the lists here given will doubtless be 
at least doubled, and it is possible that a number of well-known spe- 
cies have by oversight been left out of our enumeration. 
The European (German) species of thorn (Crataegus) afford food to 
one hundred and four species of insects, including one species of mite. 
Of these there are twelve species of beetles, seventy-two of Lepi- 
doptera, while there are six species of saw-flies, the remainder being 
Diptera and Hemiptera. 
INSECTS AFFECTING THE WILD CHERRY. 
Prunus virginiana, P. serotina, etc. 
AFFECTING THE TRUNK. 
1. Cystophorus verrucosus Oliv. 
Order Coleopteka: family Cerambycid^e. 
Mr. Harrington records the discovery of this longicorn in the wood 
of the wild red cherry, and "he also found a large number of larvse 
which I think were of the same species, as they occupied similar cavi- 
ties to that of the beetle." (17th Rep. Ent. Soc. Ontario, 1887, 17). 
This beetle resembles Euderces, but the elytra are without ivory-like 
spots, and the eyes are oblique, emarginate. 
2. The cherry-tree borer. 
JEgeria exitiosa Say. 
Mr. W. L. Devereaux, of Clyde, N. Y., writes me that he has observed 
this borer in the trunk near the ground and in the bark of the roots of 
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