the fourth and fifth united, sixth joint a little shorter than the third, 
nearly equal in length to the fourth and fifth united, tipped at the 
end with a small rudiment of another joints whole antennae marked 
distinctly with transverse ridges. Without honey-tubes. Posterior 
win^s with two branch veins arising from nearly the same point, 
speaking more exactly the subcostal vein soon after leaving the base 
apparently divides into three branches, the second branch apparently 
forming the continuation of the subcostal vein. 
The following notes in regard to color were taken by Prof. Bundy 
from fresh specimens. Winged female —General black color, smoky 
brown on the ventral side of the abdomen, indistinctly striped above 
with transverse lines. Antennae and eyes black. Wings dingy white 
with widened veins, forming conspicuous dark spot near the margins. 
Iloney-tubes white. On petioles, young on under surface of the 
leaves. 
. 
Pemphigus? formic arius. Walsh. 
i 
This and the next species are unknown to me, I give Mr. Walsh’s 
descriptions as I find them, and in his own words. 
Two kinds of larvae occurred in company; the first, when recent, 
scarcely twice as long as wide and whitish; the second, when recent, 
three times as long as wide and cinereous. From the latter I bred 
five winged individuals, which differed as follows from the description 
of P. pgri Fitch: The size is somewhat smaller; the protliorax and 
abdomen of the living insect are blue black, pruinose, in the dried 
specimen pale yellowish-brown, the abdomen much varied with fuscous; 
the thorax and head, both in the living and dried insect, are opaque 
blue-black. Legs yellowish-fuscous. Wings hyaline slightly fumose 
at tip; veins not margined with brown; the second discoidal is not 
more robust than the first and does not taper; the costa and the anterior 
half of the stigma are very pale fuscous or cinereous, the latter a 
little darker; the posterior half of the stigma is black. In the hind 
wings the apex of the black rib-vein or sub-costal is nearly twice as 
far from the apex of the second discoidal as that is from the apex of 
the first discoidal. 
Length to tip of wings .2 inch; expanse .33 inch. Five specimens. 
The stigma is much hunched posteriorly, more acute at the basal than 
the terminal end, and rather more than twice as long as wide. Bred 
October 11th, from larvae found 8 or 10 days before in the nest of 
Formica aphidicola Walsh, attached to the root of what appeared to 
be a perennial herbaceous plant. 
Pemphigus? formicetorum. Walsh. 
Differs from P. pgri as follows: The size is much smaller; the 
second discoidal is not more robust than the first and is of uniform 
robustness throughout; the third discoidal is of equal robustness with 
