THE CANADIAN ENTOMOLOGIST. 63 



posterior segments. Under surface much paler. This description was taken 

 June 30th. The imago appeared on the 13th July. 



Among the first lot of -larvae secured one differed materially from the 

 others in its appearance just before entering the chrysalis state. The body 

 assumed a deep green color with the same dark brown dorsal markings, while 

 the yellow edging of dorsal crest appeared very prominent in consequence of 

 the deepening of general color, on posterior segments it was indistinct. The 

 bordering around body close to under surface was dull pink, and the oblique 

 lines on sides of body scarcely perceptible. The under surface was a little 

 deeper in color than upper; feet faintly tipped with brown. 



This specimen became a pupa June 24th, and the following description 

 was taken on the 28th. Length, .40 in. Color, brownish black, thickly 

 covered with short yellowish hairs, with three or four faint brown spots on 

 each side of the ventral line ou posterior segments. Wing cases mottled 

 with pale browu, under surface paler. This produced the imago July 10th. 



On the first of July some additional specimens of the larva were taken by 

 Mr. E. B. Reed in another locality, also on oak. Several of these were 

 kindly placed at my disposal. Some were of the normal cast as first described, 

 while two or three appeared very distinct. The head had the same color and 

 markings in all; but in one case the body icas pale brown with a pinkish 

 tinge, thickly covered with short whitish hairs; no yellow or other mark- 

 tags. Under surface yellowish-green. In a second specimen the color was 

 of the same pale brown shade, but the yellow markings were present. Both 

 these examples presented a marked contrast with the common form of whitish 

 or greenish-white larva with broken dorsal stripe. 



In all these cases the imago appeared identical — after a careful examination 

 I could not detect any difference worthy of notice. Two of the common 

 form of larvae produced each three dipterous parasites, which escaped from 

 the larva when full grown, and produced pupae .19 in. in length, nearly oval 

 in furm ; color dark brownish-red. One of these produced the imago on the 

 11th of July. The insect has not yet been determined. 



In this interesting series of specimens we have the same imago produced 

 from 



First — ! A dull white or whitish-green larva, with green dorsal stripe and 



whitish lines, producing a pale-brown chrysalis. 

 Second — A deep green larva with dark brown dorsal stripe and yellow 



lines, producing a brownish-black chrysalis. 

 Third — A pale brown larva with a pinkish tinge, with no dorsal stripe 



or other markings. 

 Fourth — A pale brown larva with yellow lines. 



Thus showing variations as wide as those marking some distinct species. 



