438 MODERN CLASSIFICATION OF INSECTS. 
analogous, in regard to the vegetable world, to the animal parasites of 
the order Anoplura, gr lice; and which, from their constant occur- 
rence in great numbers upon almost every species of plant, must have 
attracted the attention of every observer: from the Psyllide they are 
at once distinguished by their antenne being only 7-jointed ; from the 
Aleyrodidz by the more numerous veining of their wings. ‘The ros- 
trum is more or less perpendicular or inflexed, varying in length, being 
in some species nearly half as long as the body, and consists of four 
joints (fig. 117. 12 head of Cinara Pini? Curt.). Latreille describes the 
Jabium as 3-jointed, and Curtis as 5-jointed; the terminal joint de- 
scribed by the latter appears to me to be the exserted tips of the 
enclosed sete ; the labrum is long and pointed at tip; the antennz 
are of moderate or great length, and consist of seven joints, the last 
being sometimes obsolete, and the third the longest. The ocelli, 
three in number, form a large triangle; the eyes are entire, prominent 
and semiglobose. The thorax is oval, with the prothorax forming a 
transverse collar ; the abdomen is short and convex, ovate or elongate- 
ovate, soft, and generally furnished with a more or less elongated 
tubercle on each side near the extremity. The wings are very much 
deflexed at the sides of the body, being almost perpendicular in repose 
(fig. 117.11.); the fore wings much larger than the posterior, with 
strong nerves, the subcostal nerve terminating in an elongated 
stigma, close to which runs another longitudinal nerve, obliquely 
emitting two or three straight nerves, which run to the hind margin of 
the wing, the last of which emits one or two branches; the posterior 
wings have two similar oblique nerves. The legs are long, or very long 
and slender, formed only for crawling; the tarsi short and 2-jointed, 
the basal joint being shortest (fig. 117. 13.). 
The pupa state is active, and resembles the imago, except in pos- 
sessing rudiments of wings upon the back (fig. 117. 15. Pupa Aphis 

Blot. (Myzoxyle) in Mém. Soe. Linn. Calvados. 
Bonafous. Aphis Zee, Ann. Soe. Ent. France, 1835. 
Walker, in Entomol. Mag. No. 14. 
Schrank, in Fauna Boica. 
Van Heyden, in Museum Seckenbergianum, b. 2. 1837. 
Morrem, in Annales Se. Nat., August 1836. Anat. Aph. Persice. 
And the general works of Réawmur, De Geer, Linneus, Frisch, Curtis, Latreille, 
Harris (Exposition of Eng. Ins.). 
