192 I.EPIDOPTERA. 



ttese tadpoles in full wriggling action on each hind wing ! 

 Mr. Wellman has a specimen in which these spots are still 

 larger and ovate, but without the tails. Perhaps the most 

 frequent phase of variation in this species is in the suppres- 

 sion of the more central markings of the upper side of the 

 fore wings, or in their being set farther apai-t, in either case 

 leaving a broad central band of the ground colour ; but in 

 these cases the coalesced pair of spots, at the apex of the 

 discal cell, is usually distinct and permanent. Sometimes it 

 is the first transverse stripe of black spots which is partially 

 suppressed, sometimes the second stripe. Dr. Mason has 

 one in which the whole central area of the wing is thus 

 cleared of the cross markings, but the displaced colour is 

 collected in the basal and marginal markings, and the hind 

 wings are almost entirely black, with the exception of the row 

 of black-centred fulvous spots. On the other hand, Mr. S. 

 Stevens has one with coalesced spots and bands forming a 

 cloudy black central fascia, beyond which are cloudy spots on 

 the fore wings ; also one with the ground colour whitish, and 

 another of a purplish-brown. Mr. S. J. Capper has a straw- 

 coloured specimen, one with the fore wings almost devoid of 

 the black spots and bands, and another with the dark mark- 

 ings partially confluent and with much black suffusion ; and 

 Mr. S. Webb two specimens in which the outer half of 

 the under side of the hind wings is of a pale straw colour, 

 nearly spotless, the upper side being also partially devoid of 

 markings. 



On the wing in May and June. 



Labva. Head distinctly notched on the crown, haiiy, 

 narrower than the body, which is somewhat obese with well- 

 marked segments, and slightly decreases in size at the 

 extremities ; on each segment are eight warts in a trans- 

 verse series, each prolonged into a pointed conical process or 

 spine, with rugose surface, and each placed in the midst of a 

 fascicle of short, stiff, radiating bristles. Head red, shiny, its 



