1864.] 651 



The second variety does not diiFer from that above described, except 

 by its being of a clearer green, with the oblique lateral bands entirely 

 white, and that the two dorsal stripes are replaced by two rows of black 

 points. 



The fhinJ variety is of a dull green, with six longitudinal rows of 

 blackish or brownish spots, and the head and horn ferruginous. 



The individuals of the brown ground also offer three varieties equally 

 well marked, of which the first — the most common — has been repre- 

 sented by Duponchel in his Iconographie des Ohenilles: 



The first variety is of a dead-leaf brown on the back, white on the 

 sides, and flesh color ventrally, with seven oblique bands on the sides 

 of a deeper brown, and a lateral stripe of straw color, which is continuous 

 on the first three segments, and which, beo'innina' on the fourth, is 

 interrupted on the middle of each. The stigmata are bordered with 

 white, and placed on some brown orbicular spots, which unite with the 

 oblique bands above mentioned. The head is of a pale fawn, with the 

 same black lines as in the first green variety above described. The 

 legs are blackish and the prolegs flesh color, with the crown gray. The 

 caudal shield is orange-yellow and the caudal horn entirely black. 



In the seroiaf variety iheTB are four longitudinal lines of a dirty white 

 on the first three segments, of which two are dorsal and two are lateral, 

 with two points of the same color on the four segments placed near the 

 incisures. 



The third variety is entirely of an earthy brown, with the back and 

 the oblique bands of a deeper brown. 



Besides these six varieties, intermediate ones are met with, but in all 

 those of a brown ground the body is annulated with numerous blackish 

 furrowed lines, which are cut by others longitudinally, forming small 

 squares. 



The larva feeds on the different species of Convolvulus. It hides 

 itself at the base of the plant, under the leaves, but may be easily dis- 

 covered from its large excrements. It enters the ground for transfor- 

 mation. 



The pujja is yellowish-brown, with the tongue-case very long, de- 

 tached from the breast, and half-rolled in a spiral at its tip. 



The imago appears in September of the same year, from larvae which 

 transform in July. Those which are later in changing, pass the winter 



