Dr. T. A. Chapman on Callophrys avis. 97 
days some larvae have assumed a darker tint, gradually 
deepening to a dark olive green, almost black, as com¬ 
pared with the bright light green of the feeding larvae. 
They have the yellow lateral line changed into a 
red, almost brick-red one, looking dee23ly sunk in the 
tissues. 
In looking for a place to pupate, the larvae of C. avis 
were quite disconsolate when I provided them with some 
loose earth with a little loose rubbish on top, such as I 
had found suited G. riibi admirably. With such provision 
G. o'uhi goes out of sight and pupates, if not strictly under¬ 
ground, still beneath the loose surface material. On 
providing G. avis with bits of stick, leaves, paper and so 
on, I found tliat after a period of wandering, that is 
common to so many larvae that have to travel often some 
distance in search of a puparium, they settled down, on 
some object an inch or two above the surface, sometimes 
in a little hollow, sometimes between two surfaces such as 
two dead leaves, etc., and here did some slight spinning, 
amongst which some few threads were usually disposed, 
though often separatel}^ as a girth, and there was also a 
more or less distinct anal pad. Not one example \vent 
into even the most superficial rubbish. 
In comparing the larvae of C. avis and C. mhi, we find that in 
C. rithi, in the first instar wlien fairly grown the larva has the white 
patches below the dorsal line Ijroad, very white (not ochreons) and 
without any brown patch in it on each segment as in C. avis. 
In the second instar (June 2nd) it looks not unlike C. avis in the 
same instar, but is a little greyer ; as it grows it loses all likeness to 
first-stage larva, at first rather striking, and becomes green, but with 
very marked darker and lighter green on pattern of the brown 
and white, and reaches a length of 6 mm. 
In the third instar (June 8th) (Plate XXXII), it is green with a 
very marked pjale dorsomedian line, dorsal flange line and oblique 
stripes, these are quite yellow in some specimens, pale green in others, 
but seldom quite as bright as the yellow lateral line. The hairs are 
bltick, not quite so in some, but without the rich ruddy tint 
they have in avis in the later instars. The prothoracic plate is 
clearly seen brownish-black, the colouring being confined to the 
plate itself. Length 10-12 mm., according to how much extended. 
The larvae appear frequently to eat the cast skins and 
apparently the heads with them, if one may judge by the 
TRANS. ENT. SOC. LOND. 1910.— PART II. (JUNE) II 
