HYDROCAMPID.-E-CATACL YSTA. 285 



yellow. Hind wings rather long and narrow, rounded be- 

 hind, and especially so where the anal angle should exist • 

 shining white ; central spot black, elongated, preceded and 

 followed by faint blackish-brown lines, which are duplicated; 

 along the hind margin is a black-edged yellow stripe, con- 

 taining a blue-black stripe, in which is a series of brilliant 

 silvery-white dots ; cilia white. Female considerably larger, 

 with the body stouter ; fore wings white, much clouded with 

 brown, showing vague indications of a double first line, and 

 also the other lines, which sometimes are very prettily 

 developed ; hind wings larger, having the markings more 

 definite, and the jewelled black border larger. 



Underside of the fore wings of the male white clouded with 

 brown, and showing an obscure black discal spot ; the hind 

 wings white with a blackish central spot ; of the female, pale 

 brown, with the hind wings white ; body and legs white. 



On the wing from June till September, probably in a 

 single generation. 



Larva thickest in the middle, the first five segments 

 tapering towards the head, which is partially rectractile into 

 the second segment, shining pale olive-brown, darkest at the 

 mouth ; second segment long in proportion, while the third 

 and fourth are short, dorsal plate black, very lustrous, 

 margined behind with pale olive-green ; tapering also behind 

 from the tenth segment ; divisions and sub-divisions of the 

 segments deeply defined ; the whole surface deep sooty 

 olive-black, soft and velvety, except that the anal tip is a 

 little browner and less velvety; a black dorsal stripe can 

 just be discerned; the pufi'ed spiracular region is a little 

 puckered; and the small circular blackish spiracles are 

 raised in the least degree above the surrounding surface, 

 and slightly glistening ; legs well developed, pale olive | 

 ventral prolegs full and fleshy, but with small feet ; the anal 

 pair small, the tip rounded and but little sloped. (W. 

 Buckler, condensed.) 



