250 
THE entomologist’s RECORD. 
sion of the brown band by the green sides ; in the last skin it 
is included in the band. The hairs also are shorter than in last 
skin. The cast heads are very definite, in the 3rd skin all are 
small and black, in 4th they are coloured, but in the 4-moulters 
(type) the change in size is marvellous. In the 5-moulters 
the change is proportional to that in previous skins, and the 
head of the 5th skin corresponds more nearly to that of 
the 4-moulters, but is decidedly larger. The head of the 
5-moulters in last skin appears to be decidedly larger than the 
type, but, being on living larva, is not easy to compare accu- 
rately. In the last skin, the tubercles in the dorsal band are 
black with a pale circle round the base of the primary hairs, 
and there are one or two secondary hairs of more importance 
than the others, which have pale bulbous bases. The tubercles 
on the pale area also have distinctly a primary hair (except the 
marginal), but they are less strikingly differentiated from the 
others. There is an indication on 7 and 8 of a pre-spiracular 
tubercle, one hair being present. On the marginal tubercle, 
the hairs are pale and more numerous, the tubercles forming a 
marginal eminence, and the hairs a fringe in the manner, 
though not so decidedly, of megacephala. Beneath the marginal 
there is, on the segments unprovided with legs, a ventral 
tubercle with several pale hairs and other scattered hairs 
nearer the middle representing one or more tubercles, but 
without any raised base. In the dark specimen, the tubercles 
of 13 are black, and the circumspiracular tend to have some 
dark tinting on their margins, the darkness of the green area 
consists in the hair-points being very black, the skin generally 
being denser and more opaque, certain ill-defined brownish 
clouds, of which the most definite forms a waved arch on each 
segment passing over the spiracles, and others most marked 
above and in front of the supra-spiracular tubercle. August 
igth. — 7 of the 4-moulters have this evening become dark 
coloured, and, when offered some rotten wood, at once com- 
menced to burrow into it. In this state the dorsal tubercles 
become very distinct and the arched position noted by Mr. 
Buckler and the prominent angle given to 5, 8, 9 and 10 are 
obvious. That six-sevenths of the brood were 4-moulters only 
was undoubted, but that so large a proportion as 15 per cent, 
should vary to 5 moults is remarkable. The great jump from 
4th to 5th skin as measured by the size of the head and the 
large proportion of exceptions, would suggest that strigosa has 
not acquired the habit of being a 4-moulter for so long or so 
