ENTOMOLOGICAL CONTRIBUTIONS. 11 



IV. ON THE LARVA OF PHILAMPELUS ACHEMON (DRURY). 



Egg. Found on the under side of a grape-leaf, July . No 

 description was taken, but from recollection, it was of a larger size 

 than those of other sphinges, and nearly round in form. A few days 

 before its development, it was irregularly marked with light red. 

 From the shell having been eaten by the larva after its escape, it 

 could not be ascertained if the color was permanent, or if the shell 

 was colorless and transparent, as are all the sphinx egg-shells which 

 have come under my observation. 



Young larva. The larva emerged July 10th, measuring 11-lOOths 

 of an inch, and with a uniform light green color. Its caudal horn 

 was very conspicuous, being one-half the length of the body, very 

 slightly tapering, straight, of reddish-brown color, and carried 

 perpendicularly to the body. 



First molt. The time was not noted. TsTo change in appearance 

 was observed except in size. Previous to its second molting, its 

 length was 53-100ths of an inch, with a diameter of 3-100ths of an 

 inch. Color, light green, with white dots on the annulets, a sub- 

 dorsal stripe of regular white spots, and indistinct lateral bands of 

 similar spots directed anteriorly. Head of a uniform delicate green, 

 without stripes or spots. Horn one-fourth of an inch long, dark 

 reddish-brown, covered with minute cilia, and with a prominent green 

 base, borne erect, with its tip directed anteriorly ; from the base of 

 the horn, a reddish-brown line, extending to the anal shield. Legs 

 green. The anterior segments of the body are moderately enlarged. 



Second molt July 15th. The body marked as in the preceding 

 stage. The horn of a lighter shade of reddish-brown, and its tip darker 

 than before; anterior to it, on its base, of which it now occupies the 

 posterior portion, a small triangular black spot, with its apex in front. 



A day preceding its next molting, the larva measured 8-10ths of 

 an inch in length, with a diameter at the sixth segment of 15-lOOths 

 of an inch. Its fourth, fifth and sixth segments are enlarged. The 

 lateral stripes are well defined. The lateral bands show indistinctly, 

 in a yellow-green spot nearly surrounding the stigma, and in another 

 anterior to it on the second annulet; the four posterior bands are 

 more conspicuous than the other two ; horn, one-fourth of an inch 

 long, of a fulvous color, and with its tip curving toward the head. 



Third molt July 22d. Immediately after the change it pre- 



