42 METAMORPHOSES OF 



leaves of the orange, on which the caterpillar feeds. They 

 are spheroidal in shape, and dull orange colour. 



Larva, a, Full-fed. San Paulo, April 20, 1878. 



The strange-looking caterpillar is rery sluggish in its 

 habits, remaining for hours on the leaf without moving. It 

 has a shiny skin that gives it the appearance of being wet, 

 and is clammy to the touch. When annoyed it protrudes 

 two bright orange-coloured tentacles from the prothoracic 

 segment, which have a pungent and disagreeable odour, a 

 tiny drop of colourless liquid forming at the end of each 

 tentacle. The odour of the liquid is so strong that if it gets 

 upon one's hands it takes a good deal of washing to get rid 

 of it. 



Pupa, a, Full-fed, March 2^, 1878. 



When full-fed the caterpillar fixes itself by the "tail" and 



by a loop round the thorax to a branch of the tree, the head 



being uppermost, and in that position it changes to the 



remarkable chrysalis resembling a rotten twig broken off 



short. 



/«, ^ Full-fed, Ap. 30 ; Imago, Sep. 29, '78 = 152 dys. 



\b, „ „ 23 „ Oct. 20, '78 = 180 „ 



^''''^'''U, „ „ 23 „ „ 25, '78 = 185 „ 



U „ ,= 30 „ „ 26, '78 = 179 „ 

 Specimens full-fed in April, 1878, produced butterflies in 

 August, September, and October. There appear to be two 

 broods in the year. 



XLV. — Papilio Grayi. 



Papilio Grayi, Boisduval, Spec. Gen. Lep. i., p. 365 (1836). 

 Chenu, Encycl. Pap. pi. 16, fig. 2 (1857). 



Larva, a, Full-fed. San Paulo, April 10, 1879. 



In the early stages this caterpillar closely resembles that 



