Appendices. 99 



occurrence of the insect " Euchloe Oharlonia," a North 

 and West African butterfly (which has only once been 

 recorded as having been observed in Teneriffe), is 

 accounted for by the proximity of the island in 

 question to the African mainland. This species 

 probably occurs in Lanzarote, for the same reason ; 

 it will doubtless become dispersed over the remaining 

 islands in time. 



