48 Beck, on the Metamorphosis 0/ 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 -, 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 peculiaiity 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 nearly 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 male complete insect metamorphoses. 



