152 The Pupa of Cliirouonins 



still extant, and tliose naturalists who consider such 

 a series as this : — fi) Thysanura ; (2) any locust ; (3) any 

 dragon-fly or may -fly ; (4) Chironomus ; (5) Muscidae — 

 will probably admit that the transformation of insects 

 does not agree either in motive or in its relation to the 

 rest of the life-history with the embryonic transformation 

 of most marine invertebrates. The transformation of an 

 insect, like that of a frog, is an adaJt transformation ^ 



' Miall find Donny, 1886, pp. 196-203; Miall, Nature, Dec. 19, 1895; 

 Address to Section D of Brit. Assoc, 1897 ; Boas, Zoul. Jahrb., Bd. xii, 

 385-402 (i899\ 



