274 BRITISH BUTTERFLIES. 



broad, and are much the larger at their distal ends ; their surface 

 rough or spiculate.* The sparkle of the little crystal hairs on the 

 brown larval skin, in a bright light under a glass, is remarkable, and 

 seems quite out of proportion to their small size, in some lights they 

 are seen merely as dark dots. The skin surface is minutely dotted 

 with darker skin-points ; these appear to be minute longitudinal raised 

 ridges, rather than points (see pi. vi., fig. 2). The true legs are of 

 the same colour as the larva, short and thick ; the prolegs have 

 about 20 black crochets in a circle, so complete that it is difficult to 

 say it is broken anywhere ; of the crochets, three on posterior margin 

 are more than twice as large as the others. No trace of lenticles 

 detected. [June 29th, two are now quite fat in this mstar, so that the 

 body is much thicker than the head, and there is no definite neck.] 

 Second instar : Length 3mm. Head black. Body snuff-brown with 

 numerous black skin-points. The hairs on general surface numerous, 

 white, glistening, and in the sunlight sparkle like diamonds ; they are 

 colourless, very short and clubbed, pear-shaped (attached at stalk end), 

 with indications of roughnesses or spiculations ; length about O03mm., 

 and of width about O014mm. At probable situation of tubercle i is a 

 hair-base without a hair (? lenticle). Behind the anal plate are ordinary 

 hairs. There are five subsegments to each segment, and they bear 

 the relative widths of 3:2:1:1:1; the 1st of these shows two rows 

 of these glistening hairs, 11 or 12 being visible on either side in 

 a dorsal view ; the 2nd has one row of 4 hairs, the 3rd one row 

 of 5 hairs, the 4th one row of 5 hairs, and the 5th is without hairs. 

 Third instar : Head large, black, almost exactly 1mm. in diameter, 

 finely, closely, and irregularly pitted ; the margin between the pits 

 rather sharp ; the head covered with abundant fine, white, feathery 

 hairs ; according to light and aspect these are sometimes invisible, at 

 others, make the head look quite hoary. Neck, 06mm. long, at middle 

 l'Omm. or over in width, according to development. It is now a short thick 

 larva, 5-0mm.long; greyish-ochreous; subsegmentation as before; hairs 

 now numerous, very short, consisting of a minute club and a stem no 

 longer than diameter of club ; hairs still white and glistening, the club 

 apparently rough. Some bristly hairs round the hind margin of 10th 

 abdominal ; the dorsal lenticles in same positions as before, are now, 

 relatively, a little smaller, and are annular, like spiracles. Fourth 

 instar (newly-moulted) : Length only 7mm. long ; head, a little over 

 lmm. in diameter ; black, and as in third instar ; neck 0'7mm. long, 

 at thickest part l'Hmm. wide. Body green, with a darker dorsal line 

 and well-marked subsegmentation; each segment with five subsegments, 

 relatively 3^- : 1-| : 1 : 1 : 1 in width. The glistening, short, clubbed 

 hairs are much as in last stadium ; they form a little circle round the 

 dorsal lenticle on the 1st subsegment (? tubercle i) ; dorsally on the 

 2nd subsegment are two, one in front of each other, but, on the rest of 

 this and the three following subsegments, they are in single file ; on 

 the 1st subsegment they are irregularly scattered (but almost sym- 

 metrical) rather than in two, three, or more rows. The lenticles on the 



* In the second and following stadia they are more numerous, and no longer 

 identifiable as tubercular ; relatively smaller, but actually about the same size. In 

 the third and fourth stadia, they become definitely trumpet- or calyx-shaped, but in 

 the last skin all the numerous minute hairs are quite ordinary in their form (see 

 plate vii). 



