BNTOMOLOarCAI, OONTRIBVTIONS. 119 



V. SMERINTHUS GEMINATUS SAY, AND ITS SUPPOSED VARIETIES. 



A number of ege^s were deposited June 12th, bv a pinned specimen 

 of the above named Sphinx. An average of twelve of the eggs gave 

 for their longest diameter 74-lOOOths of an inch ; for their shorter 

 diameter 5T-1000ths of an inch ; they were slightly flattened, and of 

 a pale green color. 



On the morning of tlie 19th, three larvas were found in the box, 

 and through the transparent shells of the undeveloped eggs (appearing 

 of a dull green), could be seen the dark caudal horn of the inclosed 

 larva, and the black mandibles busily employed in wearing an open- 

 ing through the shell.* Two or three had made small openings which 

 they were engaged in enlarging, by biting off small portions from 

 the margins. 



Young larva. — The young larva was of the length of two-tenths 

 of an inch. Color uniform pale green. Head subglobular, one-half 

 broader then the body, with the eyes and mandibles black. Caudal 

 horn fuscous, lighter at the base, slightly tapering, straight (curving 

 forward as it emerges from the shell), and carried at an angle of 

 about 85°. 



Larvae continued to emerge during the day, the last appearing in 

 the evening. Upon willow leaves being given them, they commenced 

 feeding thereon. On the third day, traces of the lateral bands and a 

 subdorsal line in lighter green were seen. When distui'bed they 

 threw their body upward, supporting themselves on their terminal 

 and one or two pairs of prolegs. 



On the evening of the 24th, they commenced taking position for 

 molting. At noon of the following day, one had molted, and by 

 noon of the 26th all but one had undergone the change, presenting 

 the following features : 



First molt. — Head triangular, granulated, bordered laterally with 

 a row of larger granulations which culminate at the apex in two 

 tubercles. Body with whitish granulations on the annulets : lateral 

 bands consisting of yellow-green papillae, which extend over three- 

 eio^hths of one segment and the whole of the two followino; : subdorsal 

 line of whitish granulations, indistinct, until before the tirst lateral 

 band where it becomes a thoracic stripe of transversely elongated yellow 

 papillae, continuing to the collar. Caudal horn straight, pointed. 



