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 

 chamdenerii 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 base of the horn. There is a wide 

 but indistinct blackish band across the anterior part of each 

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

 of the body below the spots are thickly sprinkled with 

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

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



17 



