40 METAMORPHOSES OP 



Out of ten specimens in mj' possession, eight were of a dark 

 smoky colour, with green patches on the wing covers, and on 

 the back of the thorax, while two were almost all green 

 beneath and the dark smoke colour on the back. The horns 

 in all the specimens were of a burnt-sienna colour, shaded 

 with smoke. The difference in colouring does not appear to 

 be sexual, but I am not able to state with certainty whether 

 it is or not. (See fig. 8, pi. IV.) 



Imago, a, h, c, d, March, 1880. 



On March 4th the perfect insect appeared, eleven days 

 after the larva was full-fed. 



The butterfly settles on the trunks of trees in the forest 

 with the head downwards, taking short and rapid flights 

 every now and then, especially when other butterflies are 

 passing, which it delights in chasing. When thus employed 

 it often emits loud crackling sounds, very like electric sparks. 

 It rarely flies excepting in bright sunshine. 



Family Papilionid^. 



Subfam. PierincB. 



XXIV. — Catopsilia Philea. 



Papilio PJiilea, Linn. Syst. Nat. i. 2, p. 764 (1767). Cramer, 

 Pap. Exot. ii., pi. 173, fig. e. f. Donovan, Ins. China, 

 pi. 32, fig. 2. 



Catopsilia Philea, Butler, Lep. Exot. p. 92, pi. 35, fig. 

 1-4 (1872). 



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



The caterpillar feeds on the flowers of a species of Cassia, 

 and its colour so closely resembles that of the brilliant yellow 

 flowers that it is impossible to detect it at a short distance. 

 Some of the individuals have dark green tubercles in rings 

 round the segments, others are entirely yellow. This differ- 



