28 THE ENTOMOLOGIST. 
have observed the same in the case of Cl. albipes and 
Cl. uncinatus. 
The length of time passed by the insect within the cocoon 
depends upon the time of year in which the larva spins up; 
when this takes place in the spring or summer the period of 
inclusion is not longer than a fortnight or.three weeks; but 
when the larva spins up in September the imago does not 
appear until the following spring. One larva, which spun up 
on the 23rd of May, produced the imago on the 14th of 
June; and from full-grown larva, taken on the 3rd of 
August, I obtained three imagos by the middle of the month, 
all males. 
On cutting open one of these cocoons—a little before the 
time the imago is ready to appear, that is to say on the six- 
teenth or seventeenth day—the pupa is found to be fully, or 
very nearly fully, coloured, having the appearance of our 
fig. 5, which represents a pupa so nearly ready to come out 
that it begins to move about the antenne and the palpi, and 
the last joints of the tarsi. When this drawing was made the 
insect was already black, with obscure white legs, and a gray 
stripe on the side, being the membrane between the dorsal 
and ventral plates. Brullé found the imagos develope in 
thirteen days, during the month of July. 
The perfect insects (see figs. 6 and 7) are black; the legs 
being partly obscurely white, or pale ochreous. The males 
are four or five millemetres long; the females from five to 
seven millemetres. Head nearly as broad as the thorax, 
shining black, scantily clothed with very short gray hairs; in 
both sexes the palpi are obseure white. Thorax black, with 
scanty gray pubescence ; sometimes, in the female, with a tint 
of very dark sepia. Cenchri obscure white. Abdomen 
shining black. Legs shining black as far as the knee, and 
from there dirty white, or, in some males, pale ochre-yellow ; 
the last three joints of the posterior tarsi, sometimes all, 
together with the point of the tibia, sordid brown. The 
wings, for more than the half of their extent from the base, 
are smoke-coloured, with brown nervures. Costa obscure 
white, or pale reddish brown. Stigma of the same colour, or 
faded brown. The antenne are a little longer than the head 
and thorax, black, and of a very peculiar form in the male 
(Hartig’s figure, plate 2, f. 20, is not quite exact; see our 
