48 BecKj on the Metamorphosis of a Coccus. 
hairs. At the extremity of the body two exceedingly minute 
hairs trail behind for some considerable length ; and besides 
these are numerous setse and orifices^ parts^ I believe, of the 
organ for the secretion of the cottony substance and the hard 
shield. 
The locomotive power of the larva — and this is the only 
time it makes use of it — is I believe very limited ; frequently 
it settles close to the parent home, and I imagine that when 
once the proboscis is inserted in the orange it is never removed ; 
the insect thus located, the skin on the back changes to a 
darker colour, thickens, and ultimately becomes a cast skin, 
the coccus having retreated between the secretions of the 
hard shield, as a protection above, and the cottony substance 
as a close attachment below, but to neither of them is it 
ever adherent j at this stage it also loses every trace of 
antennae, legs, and eyes, whilst, on the contrary, the proboscis 
is more fully developed : this is evidently the pupa state, and 
thus far I have been unable to detect any difference between 
male and female. 
The first indication that I have found of the male insect is 
the presence of two dark and rather diffused red spots in 
the head, and also a simultaneous disappearance of the 
proboscis (fig. 4). Then after a skin is cast, there is an 
entire disappearance of the organs for the secretions of the 
shield, which is completed of a long and narrow shape ; one 
stage more in advance and the ocelli are black and distinct, 
and there can be traced two long antennae and two wings at 
the side ; six legs are also in process of development, the 
two in front being directed forward, which is a peculiarity of 
the pupa of this genus ; and at the extremity of the body is a 
protuberance I imagine to be the male organ (fig. 5). 
Another skin is yet cast, and then there is a perfect male 
insect (fig. 6). The ocelli are four, two above and two 
below; the antennae, eight or nine jointed, very delicate, 
hairy, and pearly the length of the whole body ; the legs have 
four members, the terminal one of each being provided with 
a single hook and two or more delicate suckers ; the wings 
project considerably beyond the body, they are transparent, 
but covered with very minute hairs, and strengthened by a 
simple ribbing of two corrugations which unite at the base. 
The two halterers or poisers are oval, and terminate with a 
hair bent like a hook at the extremity; and that which I 
presume to be the male organ is long, attenuated, and 
attached at its base to/ and immediately above, a truncated 
projection which has an aperture at its apex. 
We thus find in the m^le complete insect metamorphoses. 
