758 [Assembly 
appearance, as though they were coated with varnish. For the 
purpose of regaling themselves upon this honey dew, or to de¬ 
stroy the aphides, different species of ants, flies, and quite a num¬ 
ber of other insects are always found in company with them. Seve¬ 
ral of these, and their habits, will be more particularly considered 
at the close of our account of this species. 
Grouped together, and covering the surface of the twigs and 
leaves which they infest, these lice are found in a'l stages of their 
growth. When newly born they are almost white, but soon be¬ 
come pale dull greenish yellow, which is their prevailing color 
during the larva period of their lives, the antennae, the nectaries, 
the knees and feet being dusky, and sometimes black. The ma¬ 
ture females are generally without wings, and their bodies are 
much broader than in the larva state, being shaped like an egg, 
the smaller end forward. These, as well as the winged indivi¬ 
duals, vary greatly in their colors and marks, as will be seen 
from the description of this species and its varieties which we 
here give. 
The wingless females are somewhat less than the tenth of an inch long, and are 
of a pale yellowish green color, with the head frequently more yellow than the body. 
Stripes of a deep green color are commonly present upon the back, or sometimes 
there is a single stripe in the middle, and transverse ones at each of the sutures or 
impressed lines between the segments, but these transverse stripes do not extend to 
the margin upon either side. The eyes are black. Toe beak, by which it pierces 
and sucks the juices of the twigs and leaves, the antennae, and the legs, are whit¬ 
ish, their tips black or dusky, and the knees also are commonly dusky. The necta¬ 
ries are equal in length to the distance from their bases to the tip of the abdomen, 
and are dusky or white, with their outer ends black. Protruding from the extremity 
of the abdomen is a short tail-like appendage, nearly half as long as the nectaries, 
and of a black color. But in females examined in autumn, at he time of depositing 
their eggs, this appendage was not observed. I hence infer it pertains only to those 
which bear living young. 
The males and the winged females appear to be alike in their colors. They mea¬ 
sure about 0.12 to the tips of the wings, this being double the length to the tip of 
the abdomen, or more. The head and thorax are of a coal black color, with the 
neck commonly green. I h antennse are inserted upon the front part of the head, 
between t u eyes. They are black, slightly tapering towards their tips, scarcely as 
long as the body, and slightly covered with very fine short hairs. They are seven- 
jointed, the two basal joiuts short and thick, almost as broad as long; the third joint 
is longest of all, and often shows several slight equidistant constrictions, dividing it 
seemingly into several short joints; the fourth and fifth joints are equal, and each 
