GEOGRAPHICAL DIST1UBUTION. 117 



V second species of the splendid genus of 

 i tlis, Chrysiridia (C. Croesus^ Gerst.), has 

 Lely been described from Zanzibar. The only 

 i >resentative of the genus with which we were 

 ] mously acquainted (C. Madagascariensis, 

 I ssou) was long considered to be one of 

 t > most striking insect forms peculiar to 

 IVidagascar. 



Such cases as an occasional resemblance 

 1 ween the productions of the Canaries and 

 t 3 East Indies are more difficult to explain, 

 lie Eed Admiral butterfly (Pyrameis Atalanta) 

 i common throughout Europe, North Africa, 

 ] >rthern and Western Asia, and North America, 

 1 t is replaced in the East Indies, the Canaries, 

 c d Madeira by the closely allied P. Indica. 

 . though an American species of the genus, P. 



ryiniemis, also occurs in the Atlantic islands, 

 i.d although P. Atalanta has recently been 

 itroduced into Madeira, and P. Indica into 

 Lrtugal, yet it seems almost incredible that 

 te latter species should have been accidentally 

 itroduced into the Atlantic islands from the 

 list Indies, and not into any intermediate 

 < untry. 



However, if this was an isolated case, we 



