38 TWENTY-THIRD REPORT ON THE STATE CABINET. [170] 



darker upon the apex and upon the hind margin than in the male; 

 and beneath, without the obscure band which crosses the middle of the 

 nervules in E. Harrisii. Cilia white, spotted with dark umber on the 

 ends of the nervules. Expanse of wings, 2.10 inches ; length of body 

 .90 of an inch. 



The species is readily distinguished from E. Harrisii (Plate 8, figs. 

 10, $ , 11, ? ), by the darker ground of its wings, the absence of the 

 gray shades, and its much less distinct markings. 



Larva. Length two inches. Color, grass-green. Head subtri- 

 angular, green, bordered with bright yellow, within which at the apex 

 is a A of black. Body subcylindrical, tapering at the extremities, 

 and without a caudal horn. Dorsally, a reddish-brown line inter 

 rupted on the hinder portion of each segment by a square of green 

 traversed by diagonal lines; a subdorsal yellow line borders the 

 above ; lateral stripe yellow ; substigmatal stripe white, interrupted at 

 the sutures by light green ; ventral stripe and prolegs, rose-red. 

 Feeds on the white pine, and matures about the middle of September, 

 when it enters the ground and forms a cell for pupation. 



Several of the larvae were taken by me at Schoharie, N&quot;. Y., in the 

 years 1858 and 1859, but, unfortunately, I succeeded in rearing but 

 a single individual of each sex. The larva, with the exception of its 

 characteristic feature the dorsal row of squares resembles so 

 closely that of E. Harrisii (Plate 8, fig. 8), that, meeting with the 

 latter for the first time in 1860, I believed the two identical, and 

 accordingly appended to my notes of the former, &quot; In those taken 

 this year the dorsal squares are not visible.&quot; Since then I have not 

 met with it, although the same locality has continued to give me 

 Harrisii, and in another favorable locality recently found at Bath, 

 Rensselaer county, 1ST. Y., I was able to procure of the latter species 

 between the 7th and 21th of September of last year (1869), from the 

 trunks and branches of Pinus strobus, twenty larvae, while as many 

 more were taken at the same time by Mr. Meske. 



E. Harrisii is, by Mr. Grote (Trans. Amer. Ent. Soc. vol. IT, p. 

 115), referred to the genus Sphinx, and subgenus Hyloicus of Hiibner, 

 of which S. (Hyloicus) pinastri of Europe is cited as typical. In the 

 absence of reasons advanced for such a reference, it is not easy to 

 surmise why it has been made. The stvle of ornamentation in E. 

 Harrisii and E.pincum differs very materially from that of 8. pinastri, 

 especially in their immaculate abdomens. In the earlier stages of 

 the insects the differences are still more marked, and would seem 

 effectually to remove them from a generic relationship with the spe 

 cies to which Mr. Grote would ally them. The pupse in Ellerna 



