New York Agricultural Experiment Station. 563 



fourth and fifth segments, except upon the middle of the under 

 side, where, at least on the fourth segment, some orange scales 

 often occur interspersed with the steel blue ones. The antennae 

 have no fringe along their inner sides. The fore wings are 

 ofiaque and of the same steel-blue color as the body, their tips 

 and fringes being of a purplish tint, both above and beneath. 

 The hind wings are transparent, broadly margined ui)on both 

 sides and marked at the base with steel blue, the glass-like por- 

 tion being crossed by five robust veins, and commonly there are 

 traces of a straw yellow stripe on the outer mai-gin toward the 

 tip." Brief descriptions of four varieties are also given, the 

 chief differences being in the markings, as in the case of the 

 male. 



Plate XLIV, fig. 1, is from a photograph, by Mr. F. A. Sirrine, 

 of the male and female moths together with the empty pupa case, 

 shown above, and an upper and side view of the larva shown 

 below. • 



In this climate the moths do not come forth, as a rule, be- 

 fore July 1, when egg-laying soon begins. The eggs are very 

 small, about .02 of an inch in length and half as broad as long, 

 and are oval in form. The surface of the shell is beautifully 

 sculptured and the color is yellowish white. The eggs are depos- 

 ited upon the surface of the bark during July and August and 

 are said to be placed singly and to be attached with a gummy 

 secretion. They are usually placed just above the surface of the 

 ground, although they may be deposited as high up as some of 

 the lower branches. In a short time the young borers come forth 

 and begin at once to burrow through the bark or to seek an 

 entrance by means of any convenient opening to the sapwood 

 beneath. Here they remain during the summer and winter, feed 

 ing actively until late in the fall and making the channels pre- 

 viously alluded to. November 12 the writer found four borers 

 in the root of a plum tree taken from a nursery near the 

 Station. The smallest borer measured one-eighth of an inch in 

 length, and the largest one inch. The borers remain dormant 

 during the winter but resume feeding in the spring. As a rule 



