48 METAMORPHOSES OF 



Larva, a, Full-fed. San Paulo, Feb. 16, 1880. 



When the caterpillar issues from the egg it is about four 

 millimetres long and pale green, with a long black horn on 

 the last segment. The green colour is preserved through the 

 second stage, but the length of the tail or horn is much 

 reduced, and becomes reddish in colour. In the last stage 

 the caterpillar is of a pinkish smoky grey, and has no horn 

 on the last segment. 



Pupa, a, Full-fed, Jan. 22 ; Imago, Feb. 18, 1880 = 27 days. 



The caterpillar enters the ground to undergo pupation. 



a., Full-fed, Jan. 24 ; Imago, Feb. 22, 1880 = 29 



Imago, i , 



days. 



The moth appears four weeks after the larva enters the 

 ground. I have observed it from the middle of February to 

 the middle of March. 



LXI. — Argeus Labrusc^. 



Sphinx LabrusccB, Linn. Mus. Lud. Ulr. p. 352 (1764). 

 Clerck's Icones, pi. 47, fig. 3. 



ra, Full-fed. San Paulo, Feb., 1880. 



Larva. J h, Ichneumouized specimen, penultimate stage, 

 [ Feb., 1880. 



This caterpillar feeds on the grape vine, and is remarkable 

 for its resemblance to a snake, in the last stage. In the 

 penultimate stage the marking is less snake-like, and 

 there are green patches on the sides of the 5th to 10th 

 segments. On the last segment is a long horn, curled 

 at the end like a pig's tail. On the last change of skin 

 this horn disappears, and its place is taken by a shiny 

 disk. When irritated the caterpillar vibrates the horn or 

 tbe disk, and, in the latter case, the effect of the flash of 

 reflected light is very strange. 



