ACIDAIJID.S—ACIDALIA. 53 



pale brown ; eyes black ; face purple-black ; top of the bead 

 white ; neck black, with a pale brown ridge ; thorax and 

 abdomen smooth, white ; lateral tufts small ; anal tuft 

 brownish-white. Fore wings broad ; costa arched ; apex 

 bluntly angulated ; hind margin very little oblique, geutlj' 

 curved ; dorsal margin nearly straight, ciliated ; colour white 

 or creamy-white, slightly tinged with creamy-yellow toward 

 the costa and hind margin, and in a faint degree along the 

 principal nervures ; the first and second lines, the central 

 line, and one beyond the second, form four slender, parallel, 

 not very oblique, nor very distinct, soft creamy-yellow stripes ; 

 a fifth, still parallel, but less complete lies along the hind 

 margin ; and of these the outer three lie nearest together ; 

 discal spot a small black dot ; cilia creamy-yellow. Hind 

 wings of the same colour ; the central dot black, more dis- 

 tinct, and rounded ; the stripes very similar to those upon 

 the fore wings, but fainter, and usually only four in number ; 

 cilia creamy-yellow. Female a very little smaller, stouter, 

 body and wings white, the transverse stripes more slender, 

 and less yellow ; apex of the fore wings more sharply angu- 

 lated, and discal and central dots more noticeable. 



Underside of the fore wings of the male light yellow- 

 brown ; hind wings yellowish-white ; markings of the upper 

 side i-epeated, but more distinct and browner. Body and 

 legs pale brown. Female altogether whiter ; with the trans- 

 verse lines only faintly and obscurely reproduced. Body and 

 legs white. 



Very constant in colour and markings. 



On the wing in June and July, and as a partial second 

 generation, in September. 



Larva wlien full-grown about an inch and an eighth long ; 

 cylindrical, slightly puffed at the spiracles, tapering evenly 

 toward the head, which is small and round ; the whole skin 

 is ribbed in rings which go quite round the body. The 

 ground colour is a warm stone-coloured tint (pale olive- 



