HEMIPTERA, 183 
A. fagi, L.; Reaum., Ib., xxvi, 1. Completely covered with 
white down resembling cotton *. 
ALEyRoDEsS, Lat.—Tinra, Lin, 
Where the antenne are shorter and hexarticulated, and the eyes 
are emarginated. 
A. proletella; Tinea proletella, L.; Reaum., Ib.. 11, xxv, 1, 7. 
Resembling a little Phaleena; white, with a blackish point and 
spot on each elytron. Under the leaves of the Chelidonium ma- 
jus, Brassicze, Oak, &c. 
The larva is oval, much flattened, in the form of a little scale, 
and resembles that of the Psylle. The chrysalis is fixed and en- 
closed in an envelope, so that this Insect undergoes a complete 
metamorphosis. 
FAMILY III. 
GALLINSECTA. 
In this last family, of which De Geer makes a particular order, 
there are but five joints in the tarsi +, with a single hook at the ex- 
tremity. The male is destitute of a rostrum, and has but two wings, 
which are laid horizontally on the body. one over the other; the ab- 
domen is terminated by two sete. The female is apterous and pro- 
vided with a rostrum. The antenne are filiform or setaceous, and 
most commonly composed of eleven joints {. 
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 re- 
mainder young males, the form of both being nearly similar. An 
* M. Blot, corresponding member of the Linnean Society of Caen, had published, 
in the Mém. de la Soe. Lin. de Caen, 1824, p. 114, some curious observations on a 
particular species which is very injurious to the Apple trees in the department of 
Calvados, by destroying their young shoots. He considers it as the type of a new 
genus, Myzoryle. De Geer had previously described an Aphis of the same tree, but 
as Messrs. Lepeletier and Serville—Encyc. Méthod., article Puceron—justly remark, 
that species, although also hurtful to the Apple tree, differs essentially from the 
preceding one. The abdomen of the other is not furnished with horns; its antenne 
are shorter, and, according to M. Blot, present but five joints, of which the second 
is the longest. We suspect that it re-enters into our third division—Gener. Crust. 
et Insect.—of the genus Aphis. For the other species, see the works already 
quoted, and the Faun. Bavar., Schrank. 
+ 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, 
{ Nine in the males described in this Memoir. 
