284 
LYCAENIDAE 
winter it is a light greyish-ochreous and the points are black. 
It hatches about the end of March. The larva makes its exit 
by eating away a hole in the crown of the egg. The egg stage 
lasts about nine months. 
Larva. During the first stage the little larva exactly resembles 
the outer sheath of the Blackthorn bud, which is yellow with 
rust-brown tips, and the larva is of precisely similar coloration. 
It lives and feeds on the tender portions of the expanding buds. 
When fully grown after the third moult, the larva is 15 mm. 
long. The head is pearly-white ; the first segment is com¬ 
pressed and rounded, completely overlapping the head ; on it is 
a central whitish disc. Dorsally the body is very elevated ; the 
second, third and fourth segments are not humped ; the fifth to 
ninth inclusive are strongly humped, and have a deep central 
furrow. On the inner side of each crest of these five segments is 
a crescentic, rich, deep purple-rose mark, outlined with white ; 
the anal segment has a longitudinal mark of the same colour and 
the lateral edge is tinted with paler rose colour. The ground 
colour is clear green, with four pale yellow-green oblique stripes 
and a lateral line of the same colour. The entire surface above 
the lateral line is densely sprinkled with minute amber spines. 
During the last stage, the larva appears to be continually 
feeding. For several consecutive hours I kept one under 
close observation and did not see it stop feeding during the 
whole period. The last stage occupies about ten days. The 
larvae readily devour each other in captivity. 
The larval state occupies about 60 days. 
Pupa. The pupa is short, stout and humped, and is 5*90 mm. 
in length. The head is pointed ; the thorax swollen and 
rounded, sunken at the waist; the abdomen rises abruptly 
to the third segment, where it is strongly humped, it then curves 
to the anal segment, which is furnished with cremastral hooks. 
The ground colour of the dorsal surface is a clear brown-black, 
of rather a varnished appearance, becoming ochreous-brown 
along the sides and over the wings. The thorax and side of 
the first abdominal segment are blotched with white; the 
remaining segments bordering the wings are speckled with 
white. The spiracles are prominent and shiny black. The 
dorsal surface is covered with tiny amber-coloured hairs. 
The pupa is attached to a stem or leaf of the Blackthorn 
