26 BOARMIA CINCTARTA. 
wonderful result, as only two of the pups had been 
found and devoured by such a number of those in- 
satiable pests, which appeared to have fed chiefly on 
the remains of the birch leaves amongst which they 
had spun themselves up. The B. cinctaria seemed 
not to have made any appreciable cocoons, as the 
pupa skins were found at the bottom of the pot, at a 
depth of four inches, apparently loose in the coarse 
friable soil. 
- The full-grown larva is an inch and a half in 
length, moderately slender, nearly of uniform bulk 
when viewed from above, but when viewed sideways 
is seen to taper very slightly from the tenth segment, 
both toward the head and also behind; the head is 
_ rather wider near the mouth than at its junction with 
the second segment; the skin is soft and smooth, its 
general ground colour a light and tender green, the 
head the hehtest, and rather pinkish at the mouth, 
the ocelli black; on the second segment the lines to be 
mentioned are all very faint; the whole of the back 
appears much lighter than the sides and belly, from 
the number and closeness of pale longitudinal lines, 
which are relieved by fine thread-like edges only of 
the green ground; the dorsal line is rather bluish- 
green, darkest near each segmental division, and 
having an exceedingly fine, ragged, greenish-white 
central thread; close on either side of it comes a ragged- 
edged, yellowish-white or yellowish line, followed 
closely by another, less hght or fainter, and again by 
a wider, ragged-edged whitish subdorsal line; these 
are each defined by a fine thread of green edging, and 
are relieved below by a wide line of rather darker 
bluish-green, having a very fine, ragged, paler thread 
running through it; below, again follows a faint 
greenish-white thread, edged with a darker thread of 
bluish-green, followed by a broad space of the lhght 
ereen ground, only faintly marked with the slightest 
possible trace of a pair of paler threads along the 
spiracles, which are small, roundish, oval and flesh- 
