MACROSILA. 1 85 



Fore wings with a black streak at the base, with two wavy, black 

 lines crossing the posterior part of the disk ; black marks on the 

 costa, and marginal black spots and a series of dots on the median 

 nervules. Hind wings blackish-brown, white along the interior 

 angle, with brown undulating lines. 3Iale. — The anterior wings 

 principally brown. (Smaller than the 9 with the black lines more 

 distinct. The under surface in both ash-gray, with two brown 

 bands. — Poey.) 



Mature Larva. Gen. Char. — Head large. Body nearly uni- 

 formly cylindrical, with anal shield, broad and truncate at the ex- 

 tremity. Caudal horn extremely long, slender, and membranous. — 

 Head reddish-brown. Body black, with nine or ten bright yellow, 

 transverse bands on the middle of the segments. The first seg- 

 ment, the prolegs and a spot, whence rises the caudal horn, red- 

 dish-brown, dotted with black. (Poey^sjig,) 



Pupation. The larval transformation takes place on the surface, 

 where the pupa is covered simply by the superficial debris. The 

 pupa is represented without the detached tongue-ease. (Poey.) 



JFood-jjlants. The larva feeds on a species of Plumieria. 



South America and Central ; West Indies. 



Clemens. 



I think it doubtful whether Cramer's M. hydraspus and medor are 

 the same species, but having no specimen of the former, I am un- 

 able to determine the question. The general markings of the ante- 

 rior wings are very similar, but hydraspus has three ichite spots on 

 each side of the posterior abdominal segments, besides the three 

 yellow spots on the basal rings. This is a peculiarity neither of 

 the male nor female medor of Cramer. 



Prof. Poey regards his M. duponchel ^% differing specifically from 

 medor of Cramer, and antaeus of Drury, His figure, however, 

 does not differ from a specimen in the Acad. Nat. Sciences from 

 Jamaica, nor from a Mexican specimen in my own collection, ex- 

 cept that the latter is much larger than either, and the subterminal 

 line in Poey's figure is more distinctly edged with white. 



