MACROSILA. 185 



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. Male. 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'sfig.} 



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-case. (Poey.) 



Food-plants. 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 white 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. duponchelas 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. 



