68 The Butterflies and Moths of Teneriffe. 



the caterpillar, when at full size, attains a length of 

 about four inches. It is found from January till the 

 end of May, but in the greatest numbers in April, 

 whilst the Euphorbia is in its prime. The road-side 

 between Eambla and Icod is a particularly favoured 

 spot. About one or two inches of dried earth prepared 

 as already mentioned are required for the larva to 

 make its slight case in, though when in a natural state 

 it buries itself much deeper, and the pupa is difficult 

 to find. Some were fed and reared on a species of 

 milk-wort. They thrived, but eventually turned into 

 small moths of a paler colour than usual. The pupa 

 varies much in the time of turning to the moth stage, 

 according to the weather, — from six weeks, the usual 

 time, to three months. Some caterpillars obtained in 

 January did not become moths till the end of March'; 

 others taken at full growth on March 15th effected 

 their last change to the moth during the last week in 

 April and first week in May. The pupa when it first 

 turns is of a beautiful shaded green colour with yel- 

 lowish markings, but it changes to a uniform brown in 

 a few days. The caterpillar is sometimes aff'ected by 



