172 Bulletin 176. 



the head both above and beneath. The thorax has a similar light 

 yellow stripe on each side of the dorsum, a transverse one at its base 

 which is slightly interrupted in the middle, and a short, broader one 

 on each side beneath the bases of the wings. The caudal borders of 

 the dorsal and lateral portions of the second, fourth, fifth and sixth 

 abdominal segments are light yellow ; sometimes one or more of 

 these narrow yellow bands are absent or become indistinct, especially 

 where the specimen has become greasy, as it often does in a collec- 

 tion. The anal tuft is wedge-shaped and tipped with white later- 

 ally. The legs are light yellow at the joints. Most of these light 

 colored markings are rej^resented by white in the figures of the 

 moths. The males vary in size from three-fourths of an inch to 

 an inch and a quarter from tip to tip of their expanded wings ; the 

 two males at n in figure 44 differ considerably in size. 



Fitch described seven varieties of the male moth based entirely 

 upon variations in the light colored markings. Neumoegen (1894) 

 has described a beautiful variety of the male which has the borders 

 of the wings heavily scaled with yellow ; it bears the varietal name 

 of luminosa. 



The female moth of the peach-tree borer is shown twice natural 

 size with wings spread at/" and t. /"., and natural size by one speci- 

 men at n in figure 44 ; two females are also shown natural size and 

 at rest in figure 43, one at the base of the leaves and the other at 

 the tip of the upper leaf. They are a little larger than the male 

 mot'hs, their wings expanding from one inch to an inch and a half. 

 The female is wholly of a deep steel-blue color with a satiny lustre, 

 except a broad, orange-colored band extending nearly around the 

 abdomen on the fourth, or on both the fourth and fifth segments. 

 The front wings are opaque, being entirely covered with the deep 

 blue scales, while the hind wings are transparent over about half of 

 their area, being heavily scaled with deep blue at the base and along 

 the costal margin, and sometimes also between the two veins nearest 

 the inner margin. 



A glance at/" and t.f. in figure 44 will show that the female pre- 

 sents a striking variation in the width of the orange band on the 

 abdomen. In the typical form (/./".) this orange band occurs only 

 on the fourth segment, while the female at f has both the fourth 



