Butterjiies. 47 



the same colour as the last described specimen, but is 

 not so large, measuring in expanse from two and a half 

 to three and a half inches. The tips of the fore- wings 

 are broadly marked with black, shading off to brown, 

 crossed with a band of white spots. Four of these 

 spots are of a quadrilateral form, and much larger than 

 the rest. The outer margins of all four wings are 

 bordered with black, freely dotted with white. There 

 are three black spots on the centre of the hind-wings of 

 the female ; tLe male has four, the fourth, which is 

 largest, being placed under the principal vein. The 

 under is similar in markings and colouring to the upper 

 side, but the white spots are more pronounced, and the 

 tawny yellow somewhat paler; the apex of each fore- 

 wing is moreover tipped with yellow, instead of being 

 black Hke the upperside. Tlie larva is very similar to 

 that of the Plexippus. It is somewhat smaller, however, 

 has six fleshy horns instead of four, and the transverse 

 gold and black stripes a^re interspersed with white spots 

 instead of stripes. It feeds gregariously with the above 

 variety on the "Arbol de Seda," and appears at the 

 same time, in the same locaHty, and in equal numbers. 



