76 The Butterflies and Moths of Teneriffe. 



margin. It expands about two inclies and a half. The 

 larva is grey, with a pale grey stripe on the sides, and 

 black spots on the lower surface between the pro-legs. 



CALOCAMPA EXOLETA. 



(Sword-Grass Moth.) 



This moth is an English species. It measures in 

 expanse between two and three inches, and is of a 

 soft violet grey tinge, the fore-wings having a variety 

 of brown markings. The caterpillar feeds on the 

 Euphorbia, and has been found gregariously with the 

 Tithymali on that plant. It is met with, however, on 

 peas and potatoes, and can be reared on the leaves of 

 any of these plants. The larva is bright green, with 

 two lines of black and white spots down each side of the 

 back. These are bordered by a yellow stripe (sometimes, 

 however, absent), and it has a broken red line on each 

 side. The caterpillar attains a length of about three 

 inches. Some were kept in the same breeding cage with 

 the Tithymali, but their habits were entirely different. 

 When the Exoleta caterpillar ceased to feed, it did not 

 immediately attain the pupa state, but was restless and 



