112 TWENTY-FOURTH REPORT ON TSE STATE MUSEUM. 



II. TRANSFORMATIONS OF SESIA BUFFALOENSIS, 0* AKD ROB. 



An egg of the above comparatively rare Sphinx was found on the 

 snowball ( Viburnum opulus), at Schoharie, N". Y., August , 1868 ; 

 it was nearly round, smooth, and of a pale green color. The time 

 of its hatching was not noted. 



The young larva was of a uniform whitish-green, with a straight, 

 dark brown caudal horn. 



Its first molt occurred August 24th: Length, 15-100ths of an inch ; 

 color, uniform pale green, of the shade of the mid vein of the leaf. 

 Body, under a simple lens, showing a number of delicate hairs. Cau- 

 dal horn, brown, smooth and straight. When in position for the 

 next change, its length was 32-100ths of an inch, and its diameter 

 4-100ths of an inch. 



Second molt August 30th : Length, 35-100ths of an inch. Head 

 uniform pale green, with short, fine whitish hairs. Body, slightly 

 hairy, pale green, with a lateral stripe of yellow green ; segments 

 with a yellow-green dot in front on each side of the vascular line, 

 and a few smaller ones on the posterior half. Caudal horn straight, 

 nearly cylindrical, light red, striped anteriorly near the base and 

 tipped with brown, and spotted with brown intermediately ; borne 

 at an angle of about forty degrees. 



At this stage the larva died from injuries received from some 

 larger ones with which it was confined in a small box while their 

 supply of food had become exhausted. The collection of three other 

 larvae of the species from the same bush, after their first molting, 

 afibrded the opportunity of continuing its history. 



Third molt (six days after their preceding one), on August 24th: 

 Length, one-half inch. Head granulated. Collar bordered anteriorly 

 with about twelve small tubercles. Body with features as before 

 recorded, and in addition, minutely papillose. Caudal horn light red, 

 regularly tapering from base to tip, covered with spinules which 

 anteriorly and posteriorly have black leases. Stigmata deep orange, 

 with a yellow-green dot at each end ; those of the proleg-bearing 

 segments bordered before with a deep orange line. Legs at the base 

 marked with black ; prolegs on the outer side, and body beneath on 

 the last two segments, pale red. 



Fourth molt six days later, on August 30th: Length, 65-100ths 

 of an inch ; breadth, 13-100ths. Head green, of the shade of the lower 



