156 THE BUTTERFLY VIVARIUM. 



bulk, exposing the little oval masses of yelloAV silk, 

 as shown in Plate III. No. 9. 



Thus the more than usual number of this Cater- 

 pillar are kept down in certain seasons, and many 

 other kinds of Caterpillars, equally likely to be 

 produced occasionally in great numbers, have each 

 their peculiar Ichneumon, some of which actually 

 attack the Caterpillar in the egg state, as described 

 in a previous Chapter. 



Having learnt something of the short biography 

 of the White Butterfly, and the vicissitudes to which 

 its existence is subject, the young entomologist 

 must not fancy that he now knows all about White 

 Butterflies. I must suggest to him that there are 

 many other kinds, quite distinct from that just 

 described, which are equally worthy of his careful 

 attention. First, there is a species closely resem- 

 bling Pieris Brassicce, but invariably smaller, and 

 which generally appears full a fortnight earlier than 

 the larger species. This kind, though by some con- 

 sidered only a permanent variety, is by most ento- 

 mologists accepted as a distinct species, to which 

 has been assigned the name of Pieris Chaniclea. 

 In this species the fringe at the edges of the wings 

 is yellow, the dark patch at the tips of the anterior 

 wings grayer, and the buff-colour of the under sur- 



