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male, but nearer the ground color or even darker in the 

 female. These moths appear in great numbers during the 

 month of July. Being nocturnal in their habits, they fly 

 by night, and often enter our houses, attracted by the 

 light. They do not eat during the moth state, the only 

 aim of their short existence seeming to be the perpetuation 

 of their species; for as soon as they pair and lay their eggs, 

 their object being completed, they die. 



There are few insects so easily managed as the three 

 last described. The eggs being deposited in clusters, they 

 can be secured in that form, but should any escape the eye 

 and hatch, they can be secured when in their tent, and 

 destroyed by burning or scalding. The larvae of Papilio 

 Turnus Linn, lives upon the leaves of the Black Cherry, 

 but not to any extent in Illinois. 



The Birch and Buckeye trees appear unusually free 

 from insects. Upon the latter tree has been found the 

 larvse of one of the Lepidopterous insects, but not in 

 sufficient numbers to attract attention. 



A bark-louse is found upon the Mountain Ash. I have 

 not had sufficient opportunity as yet for observing its 

 habits or ascertaining the scientific name. 



The Cotton-wood tree does not suffer much from borers 

 in our vicinity. A tree which was felled one year ago on 

 the bluff, and more than twenty-five years old, was almost 

 free from insect depredation. There are, however, two 

 insects found on the leaves worthy of consideration. 



Pemphigus vagabundus. WALSH. 

 (HEMIPTERA. APHID.E.) 



Commonly known as the vagabond Pemphigus, "so 

 called from its habit of wandering to very great distances 

 in its native forests, raises large galls on the tops of the 

 Cotton-wood and Balsam Poplars; the old blackened galls 

 hang on to the twigs for several seasons, giving the tree 

 a singular appearance when the leaves are off in the winter 



