THE STATE ENTOMOLOGIST. 135 



[Fig-. 57.] 



/^O^v^^T' 



Coin (1 ho iug into apples 



and peaches, and as 1 also 



r^^lip^ commonly found it hiding 



in and feeding upon one of our large oak-apples (the spongiUca) we 



may conclude that it is a very general feeder and that it is foul of 



boring. 



This worm (Fig. 57, a) is found during the months of May and 

 June and when full grown burrows beneath the surface of the ground 

 where it forms a very thin cocoon of filmy silk with the earth adher- 

 ing to it on the outside It changes to a inahogony-brown chrysalis 

 and generally issues as a moth during the September or October al- 

 lowing, though in northern Illinois I have known it to remain in the 

 chrysalis state through the winter and not issue as a moth till April. 

 The moth (Fig 57, a) varies considerably in its appearance, but 

 is characterized by the cold ash-gray appearance of the front wings 

 which are variegated with darker gray as in the figure. It is an un- 

 de-cribed species and belongs to a genus (Xylina) which is easily 

 recognized by the long narrow almost rectangular wings, the very 

 square thorax which is often furnished behind the collar with a bifid 

 crest, and the rectangular and flattened ahdom n. The wings are 

 folded in repose and appear almost parallel and like a flattened roof — 

 giving the insect an elongate appearance. 



Xvlina cinerea, N. Sp.— Larva (Fig-. 57, a.) Length when full grown 1.20—1.30 inches, color 

 shiny silvery-green on the back, darker below. A medio-dorsal cream-colored stripe ; a subdorsal 

 one represented by 3 or 4 irregularly shaped spots on each joint. A broad deep cream-colored stig- 

 mata! line, with a few green dints in it, extending to anal prolegs. Four slightly elevated cream- 

 colored spots, encircled by a ring of rather darker green than the body, in the dorsal space, and in 

 the subdorsal space there are four or more similar but smaller spots. Venter glaucous-gray. 

 Head as large as joint 1, free, glassy-green with white inottlings at sides and top, and pearly-white- 

 lips. Thoracic legs whitish. Prolegs concolorous with venter. When young the body is darker 

 and the markings paler. — Described from two living specimens. 



Imago (Fig. 57, b) — Front wings, with the ground-color pale cinereous shaded and marked either 

 with light brown, having a faint purplish tint, or with darker brown, having a similar reflection, 

 or with a colder grayish-brown with the faintest moss-green reflection : in the first two cases the 

 dark color either blends and suffuses with the ground-color so as to give the wing a nearly ui.iform 

 and smooth appearance, or else contrasts sufficiently to bring- out all the marks distinct; in the lat- 

 ter case (two specimens) the markings are very distinct and the ground color is whiter and more 

 irrorate. In the well marked specimens the usual lines are readily distinguished, the basal half line, 

 transverse anterior and transverse posterior being quite wavy, pale, and bordered each side with a 

 dark shade, the median shade dark and well defined and the subterminal line, though sometimes 

 pale near costa, forming a series of dark angular spots : in the more uniform specimens these lines. 

 are barely distinguishable and perhaps the most constant is the sub terminal which most often takes, 

 the form of a series of dark angular spots : the ordinary spots have a pule inner and a more or 

 less distinct dark outer annulation ; the orbicular is larger than the reniforua and is sufficiently 

 double to take on the form of an 8, the upper part of which is always largest and with the interi.Q.1? 



