ATTACKING THE LEAVES. 



257 



markings; but there are differences which will enable anyone 

 with ease to separate the two species. Lineata is much the 

 larger insect, measuring, when its wings are spread, about three 

 and a half inches, while chamsenerii rarely exceeds two inches 

 and three-quarters. The central band on the fore wings in 

 chamsenerii is wider and more irregular, the thorax also is less 

 marked with white; but the most striking point of difference 

 is that the veins of the fore wings in lineata are distinctly 

 lined with white, a characteristic wanting in chamsenerii. 



The mature larva measures from two and a half to three 

 inches in length. The head is small, dull red, with a black 



Fig. 267. 



Stripe across the front at base. The body above is deep olive- 

 green, with a polished surface; there is a pale-yellowish line 

 along the back, terminating at the base of the caudal horn, 

 and on each segment, from the third to the twelfth inclusive, 

 there is a pale-yellow spot on each side, about half-way 

 between the dorsal line and the breathing-pores, largest on 

 the segments from the sixth to the eleventh inclusive; the 

 spot on the twelfth segment is elongated, and, extending 

 upwards, terminates at the ba.se of the horn. There is a wide 

 but indi.stinct blackish band acro.ss the anterior part of each 

 segment, in which the yellow spots are placed, and the sides 

 of the body below the spots are thic^kly sprinkled with 

 minute raised yellow dots. The horn is long, curved back- 

 wards, red, tipped with black, and roughened on its surface : 



17 



