123 THE ENTOMOLOGIST. 



manner of a slug, no separate motion of the body or legs 

 being pereeptible. Head very small, entirely concealed 

 within the 2nd segment ; body formed like that of the 

 familiar miillivalve-shell known as a Chiton, the divisions of 

 the segments being clearly defined, and the posterior margin 

 of each curvilinear and overlapping the anterior margin of 

 the next succeeding segment ; dorsal surface convex, sprinkled 

 with numerous extremely minute warts and slender bristles ; 

 ventral siuface flat ; legs and claspers forming a raedio- 

 ventral double series, and each pair being closely approxi- 

 mate and far removed from the margin. Colour of the head 

 dingy green, with a few dark brown markings ; of the body 

 opaque apple-green, the warts being white and the bristles 

 sienna-brown : in some specimens the green is interrupted 

 by three stripes of a delicate purplish pink, one of them 

 medio-dorsal, the others marginal. This ornamentation is 

 described as normal, but I have not found it so, uniform 

 green being the coumioner colour. When full-fed it attaches 

 itself to the under side of the leaf or to a petiole, and under- 

 goes its change to a pupa, which is obese and short; the ab- 

 domen particularly stout ; head rounded, without angles or 

 ears ; anal extremity also rounded, and without points, the 

 extremity incurved and furnished with extremely minute cre- 

 mastra?, by which it is attached to the web previously spun 

 by the larva ; it is also fastened by a surcingle round the 

 waist: the entire dorsal siirface and the abdominal portion 

 of the ventral surface are beset with short and stiff bristles, 

 each of which is dilated at the extremity, and has the ap- 

 pearance of a stalked gland, similar to those which occur so 

 commonly on plants: I do not find any of these processes on 

 the cases of the antennse, legs or wings, but they occur freely 

 on every other part of the pupa. Colour dull pale brown, 

 approaching to putty-colour, and irroraled or variegated with 

 dark brown, approaching to black : these dark markings are 

 grouped into a medio-dorsal series, almost forming a con- 

 tinuous stripe from the head to the anal extremity ; they also 

 form three lateral series of spots on each side, of which that 

 series nearest the medio-dorsal stripe is composed of very 

 small spots, and is often indistinct, while the others are in- 

 variably distinct and strongly pronounced ; similar spots 

 occur on the ventral surface of the abdomen : the dark 



