106 



BRITISH BUTTERFLIES. 



2'2mm. long, 0*7mm. broad, very short and thick ; hairs as noted in 

 newly-hatched larva ; instead of the colour being an uniform ashy-grey it 

 is now reddish-brown and white. Head now relatively small, black, with 

 some white markings ; pro thoracic plate dark, but not black ; anal 

 plate dark. The colours are red dorsally, between origins of first and 

 second hairs, with paler dorsal line ; then white in a broad subdorsal 

 band reaching down to the next row of hairs ; thence to the flange 

 red, but mixed with some white in a definite pattern ; flange white 

 (April 26th. From larva found wild). The white subdorsal band, 

 seen laterally, is still a band curving over each segment, but, viewed 

 dorsally, it is narrower in front of each segment, and bulges down into 

 a deep curve on the posterior half of the segment ; below this is a red- 

 brown area, containing a white patch, with its apex towards the 

 narrower part of the white band, and its divided base towards the pale 

 flange; seen laterally, these patches form a narrow and interrupted 

 line with the white flange below, and the white subdorsal band above ; 

 an extremely narrow mediodorsal pale line ; the group of three dorsal 

 hairs is at the margin of the white band ; the next set of hairs is at 

 its lowest margin. There are no hairs on the lateral red band (or none 

 of any size) ; four hairs on the white flange, two above and two below ; 

 the hairs are black, and the larva does not look so hairy as when they 

 were crowded together in the newly-hatched larva. Below, the larva 

 is pale, with redder marblings towards the incisions ; the pale is not 

 white, nor is the red as dark as that above (April 30th. The larva 

 still feeding and now very fat). Second instar: The colours are less 

 marked than before moult ; the white is rather yellow, and the red- 

 brown nearer terracotta. The hairs are more numerous. The sub- 

 dorsal white, on each segment, carries a group of somewhat radiating 

 hairs (black), twelve or thirteen in number, hardly encroaching on the 

 dorsal brown band. The next brown band has a few hairs, and, again, 

 there is a radiating group on the pale flange ; length 2-6mm. (May 

 2nd, 1906). [May 5th, this larva has now grown to 5-0mm.] The 

 hairs now look less crowded. There is a group on yellow band, 

 encroaching a little on dorsal red band ; this, and those of the lateral 

 flange, are so spread as to almost amalgamate with each other by 

 certain intermediate scattered hairs, that form one or tw 7 o intermediate 

 rows. The yellow band is very bright, with the lower border sloping, 

 on each segment, so as to be much lower at posterior margin ; between 

 this and the yellow flange is a pale reddish region, with a yellowish mark 

 in it on each segment ; a portion of this band, whence the hairs (v) 

 arise, looks brightly silvery in certain lights (May 5th, 1906). In this 

 (second) instar the hairs are very numerous. There are about twenty 

 on each side in front of the prothoracic plate ; this plate is dark, w T ith 

 median pale line (suture) ; it carries two lenticles on each side, and 

 may have a fine hair or two ; the spiracle is a high cone ; no separate 

 group of hairs is definable. On the mesothorax is a patch of short 

 hairs a little way above the leg; it contains several small lenticles; the 

 rest of the hairs (about 0'4mm. long) are placed continuously across 

 the segment, most densely, and with the longest hairs, dorsally, thirty 

 to forty on either side, with a mediodorsal lenticle. The metathorax 

 is much the same, except that the hairs collect to some extent into 

 groups like those on the abdomen ; there is the mediodorsal lenticle, 

 and several others lower down. On the abdomen is, on each segment, 



