139 
Passirini in “ Gli Afidi Italy describes a species which may be ident¬ 
ical with this. I give his description in full as a means of compari¬ 
son, and of determining this point. 
Schizoneura venusta Pass. 
Wingless female —Ovate-convex, pale green or sometimes reddish; 
head, three anterior dorsal fasciae, a quadrate discoidal spot, two pos¬ 
terior fasciae and marginal points, black. Rostrum extending about to 
the middle legs. Length (of body) 1 mm. 
Winged female. —Head and thorax black. Abdomen greenish yellow 
or reddish; two anterior fasciae, a sub-rotund discoidal spot and mar¬ 
ginal points, black. Nectaries tuberculiform and black. Length o-4 
to 1 mm. 
Pupa yellowish, head and thorax pulverulent. Found on roots of 
Setaria viridis , S. glauca, S. italica, Panicum glabrum , Eragrostis m.eg- 
astachya and Ceratochloa australis , in Autumn. 
Schizoneura querci. Fitch. The “Oak Blight,” or Wooly Aphis of 
the Oak. 
This species is found in the northern part of this state, upon oak 
limbs. Fitch says it is very similiar to another species found on the 
bass-wood. 
The winged individuals are black throughout, slightly dusted over 
with an ash-gray powder. 
The fore-wings are clear and transparent; the stigma is dusky, the 
rib-veins black, and the third discoidal vein with the basal portion 
abortive nearly or quite to the fork. The length to the tip of the 
wings is (0.16), a little over one-eight of an inch. 
Schizoneura tessellata. Fitch. The Alder Plight. 
This species is found on the under side of the branches of the 
Alder ( Alnus rubra), crowded together and concealed beneath a cov¬ 
ering of snow-white down. Wingless individuals, dull bluish back; the 
back of the segments are marked with strongly impressed lines, and 
covered with white down in square, checker like spots. Length to 
the tip of the abdomen, 0.16 inch. 
Schizoneura imbricator. Fitch. The Beech-tree Blight. 
This species occurs on the under side of the branches of the beech, 
covered with a coating of white down; and, according to Dr. Fitch, 
