observed in Bombyx Cynthia. 489 
ce@leris paribus the smallest individuals emerge first, and that 
these are generally males. 
I proceed now to make a few remarks on the specimens exhibited. 
The first two are fine 9, measuring a little over 6 inches in expanse. 
No, 3 is a not uncommon variety, partially variegated with a tawny 
tint. No, 4 is a very fine male, measuring over 5 inches. Nos. © 
5 and 6 are splendid dark ¢ varieties of early summer. No. 7 is 
a tawny autumnal tinted specimen. No. 8, a ¢, deficient in size, 
tint and coloration, and during life was weakly ; it emerged late, 
and the larva had probably been injured or was unhealthy. Nos. 
9, 10, 11, 12, are remarkable for the variation in the colour of 
the tufts on their bodies, the twe latter having very large tufts, so 
as almost to be called woolly. No. 13 is a @, remarkable for the 
rich olive-brown ground-colour. In this variety the wings seldom 
attain the full size of specimens Nos. 1 and 2. ‘Two dwarfs of the 
stunted half-starved second brood of 1865 complete the series in 
that half of the box. These are remarkable for their small size 
(3 inches expanse) and their deficiency in coloration. 
In the lid of the box we have Nos. 1, 2, 3, three ¢, remark- 
able for their white-tufted bodies and small size; No. 4, a small 
¢ fed on laburnum, deficient in size and ground coloration; No. 5, 
a ¢ fed on plum, rather larger and better coloured, but in both 
respects rather below the average. Nos. 6 and 7 are remarkable 
for a broad black band across the dorsum of the abdomen, near 
its junction with the thorax. In No. 7, as also in Nos. 8, 9 and 
10, a spot, or an approach to a spot, occurs at the inner aspect of 
the lunule of the upper wing. In Nos. 11, 12, 14 and 15 a similar 
curiosity is seen, the most marked in the last; this is caused evi- 
dently by the white marks approximating somewhat more closely 
than in the normally marked specimens ; hence the space between 
the white lines is smaller, and instead of a patch we get a spot, 
more or less small. Nos. 12 and 13 are remarkable for having 
their upper wings not fully developed, one being on the left, the 
other on the right: a great many specimens were noted as pre- 
senting this appearance, and it was found to proceed from a want 
of space to extend the wing: if any contiguous object, either a 
cocoon or the wing of another insect, prevented the expanding 
wing from attaining its full dimensions by the resistance which 
was offered, the wing so opposed remained imperfectly developed, 
whilst the other wings attained their natural size. Nos. 16 and 
17 are two ¢ dwarfs. Nos. 19, 20, 21 and 22 are dwarfs, having 
bodies more or less tufted with white, and wings with the colora- 
