ORDER VII. HEMIPTERA.— PLANT LICE. 305 
presents above a very great gibbosity. The antenne are short, with a 
globular second articulation, and a small terminal hair. 
#’, Lanternaria. — The Lantern Fly is yellow, varied with black. The 
elytra are of a greenish-yellow, sprinkled with black; the wings, of the 
same color, have at the extremity a large spot, resembling an eye, which is 
surrounded by a brown circle very broad in front. It inhabits Guiana. 
This remarkable insect enjoys a great renown on account of its luminous 
properties. Madame De Merian thus speaks of this peculiar character : — 
“Some Indians having one day brought me a great number of the Lan- 
tern Flies, I shut them up in a large box, not knowing, then, that they gave 
light in the night. Hearing a noise, I sprang out of bed, and had a candle 
brought. I very soon discovered that the noise proceeded from the box, 
which I hurriedly opened ; but, alarmed at seeing emerging from it a flame, 
or, to speak more correctly, as many flames as there were insects, I at first 
Jet it fall. Waving recovered from my astonishment, or rather from my 
fright, I caught all my insects again, and admired this singular property of 
theirs.” 
The second family of the Homopterous Hemiptera, the ApAi‘dii, contains 
some singular groups, one of the most extraordinary of which is the genus 
Apuis. —The Plant Lice. These insects are small, and have the wing- 
covers and wings oval or triangular, the antennw longer than the thorax, 
and the posterior portion of the abdomen furnished with two horns. They 
live chiefly in society, upon trees and plants, which they suck with their pro- 
boscis. They are not organized for leaping, and crawl but slowly. They 
multiply with astonishing fecundity, and often are very injurious to vegeta- 
tion, covering the leaves of the rose, oak, apple, and other trees and plants 
by millions. The two horns at the extremity of the body, in several of the 
species, are tubes, from which they have the power of ejecting, at will, small 
drops of a transparent, honey-like fluid, of which the ants are very fond, 
and which they appear voluntarily to yield to them, whence they are some- 
times called the “ Ants’ Cows.” M. Huber describes the manner in which 
these insects are mé/ked, so to speak, by the ants : — 
“Tt had been already noticed,” says this celebrated observer, “that the 
ants waited for the moment at which the Plant Lice caused to come out of 
their abdomen this precious manna, which they immediately seized. But I 
discovered that this was the least of their talents, and that they also knew 
how to manage to be served with this liquid at will. This is their secret — 
a branch of a thistle was covered with Brown Ants and Plant Lice. I ob- 
served the latter for some time, so as to discover, if possible, the moment 
when they caused this secretion to issue from their bodies; but I remarked 
that it very rarely came out of its own accord, and that the Plant Lice, 
