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They are very voracious, and when occurring in great 

 numbers, will strip whole limbs, marring the beauty of the 

 tree, and often seriously injuring it. Having attained full 

 growth, they suspend themselves from some object, and 

 change into a chrysalis of a dark brown color, with large, 

 tawny spots around the tubercles on the back. After 

 remaining in this position from eleven to twelve days, the 

 butterfly appears, the whole time consumed, irom the egg 

 to the butterfly, being a little over one month. There are 

 two broods each year, the butterfly of the second brood 

 hybernating, and may be found, during the winter months, 

 under the eaves of houses, and in secluded places, appar- 

 ently lifeless, but reviving when brought into a warm room. 



As soon as the first warm days of spring appear, this 

 butterfly may be seen flying, often presenting a dilapidated 

 appearance. It expands from three to three and a half 

 inches. The upper side of the wings is purplish brown, 

 with a broad buff-yellow margin, near the inner edge of 

 which there is a row of pale-blue spots ; the under side is a 

 mottled wood-color. In the sunlight this butterfly pre- 

 sents a beautiful appearance. Gathering the caterpillars, 

 and destroying them, is the only artificial remedy I know 

 of. This is comparatively easy, from their habit of cluster- 

 ing together on the leaves. 



Tremex Columba, OF LINNAEUS. 

 (HYMENOPTERA. TREMEX.) 



This insect can be seen on the trunks of the Elm, Pear 

 and Button wood, during the months of July and August. 

 The body of the female is cylindrical, about as thick as a 

 small lead pencil, and more than an inch long, exclusive of 

 the borer, which itself is about an inch in length, and pro- 

 jects three-eighths of an inch beyond the end of the body. 

 It is concealed, when not in use, between two narrow rust- 

 colored side pieces. The head and thorax are rust-colored 

 varied with black. Across the back are seven ochre-yellow 

 transverse bands. The antennae are rather short and rust- 



