68 [Senate 
Appie-roor Brent, *E. pyri. Black, more or less pruinose, 
with a tuft of cotton-like down on the tergum and com- 
monly a smaller one on the head; fore wings hyaline, 
with a large black stigma and nerves, the externo- 
medial nerve hyaline towards its base; inner edge 
black from the base to the apex of the first nerve, 
hyaline beyond. Length, 0°20. Common on the wing 
in groves, in autumn. On the roots of a young apple 
tree brought me from a nursery, excrescences were 
observed, the erevices in which were found to be 
covered with small lice-like larvee, among which some 
winged individuals occurred, which proved on exami- 
nation to be this species, from which circumstance its 
habits are inferred and its name bestowed. No. 862, 
male. 
Auper Bucur, *E. tessellata. Dull bluish-black; tergum with 
the seyments marked by strongly impressed lines and 
covered by white down in square checker-like spots. 
Length, 0-16. On the under side of branches of the alder, 
(Alnus rubra, Marsh.) crowded together and concealed 
beneath a dense covering of snow-white down. I have 
searched in vain for winged individuals of this species. 
No. 863. , 
Brecu-TreE Bureut; E. imbricator. Black three last segments 
of the abdomen blue-pruinose ; stigma brown; longitu- 
dinal nerve and a line on the middle of the inner margin 
black. Female (?) winged; abdomen fulvous, with a 
black spot on the disk; legs pallid. Larva pallid, with 
2 fuscous dorsal stripes; posterior half of the abdomen 
covered with a tuft of cotton-like down, from which 
proceeds two longer and coarser filaments. Length, 0-22. 
On the under sides of the branches of the beech tree, 
covered with snow-white down. On the slightest jar of 
the branch, a shower of tiny drops of a water-like fluid 
falls from these insects. Having met with no description 
of the E. fagi, (Linn.,) or its habits, I am unable to 
ascertain whether that insect is dissimilar to ours. No. 
864, male; 865, female (7); 866, larva. 
