52 INSECTA. 
FAMILY IIl. 
GALLINSECTA. 
In this last family(1), of which De Geer makes a particular 
order, there are but five joints in the tarsi(2), with a single 
hook at the extremity. The male is destitute of a rostrum, 
and has but two.wings, which are laid horizontally on the 
body, one over the other; the abdomen is terminated by two 
sete. The female is apterous and provided with a rostrum. 
The antenn are filiform or setaceous, and most commonly 
composed of eleven joints(3). ’ 
They constitute the genus 
Coccus, Lin. 
The bark of various trees is frequently covered with a multitude 
of little oval or rounded bodies, in the form of fixed shields or scales, 
in which, at the first glance, no external organs indicative of an In- 
sect are perceptible. These bodies are nevertheless animals of this 
class and belong to the genus Coccus. Some are females, and the 
remainder young males, the form of both being nearly similar. An 
epoch, however, soon arrives in which all these individuals expe- 
rience singular changes. ‘They then become fixed; the male larvz 
for a determinate period, requisite for their ultimate metamorphosis, 
and the females for ever. If we observe the latter in the spring, we 
shall find that their body gradually increases to a great volume, and 
finally resembles a gall-nut, being sometimes spherical; and at others 
reniform or scaphoid. The skin of some is smooth and level, that 
of the remainder presents incisures or vestiges of segments. It is 
in this state that the females receive the embraces of their males, soon 
after which they produce a great number of eggs. They slip them 
between the skin of their venter, and.a white down which covers the 
> 
(1) Orthe Gallinsectes of the French naturalists. 4m. Ed. 
(2) M. Dalman, Director of the Cabinet of Natural History of Stockholm, in a 
Memoir on certain species of Coccus, presumes that there are three of these joints. 
(S) Nine inthe males described in this Memoir. 
