105 
Chaitophorus yiminalis. Mon ell. 
Wings hyaline: honey-tubes distinct. Not pulverulent. Seventh 
joint of the antennae long. General color of the winged specimens 
dusky, with, the margins of the abdomen yellow. 
Found on the willow. 
/ 
Chaitophorus salicicola. Monell.* 
Wings hyaline; honey-tubes distinct, fusiform; not pulverulent. 
Seventh joint of the antennae short. General color red. 
I give this on Mr. Monell’s authority but I would not be surprised 
if it proves to be but a variety of Uhler’s Lachnus salicicola which is 
hereafter described. 
Chaitophorus candicans (?). The Balm of Gilead Plant-louse. 
Infests the base of the leaves of the Balm of Gilead, and appears to 
be different from the A., populi , of Linnaeus. But in order that this 
may be determined, I give here briefly, the characters of the latter, 
which has been transferred by Koch to his genus Chaitophorus. 
The rib vein hardly approaching the front border, and then very 
slightly diverging from it; its angle very blunt and scarcely percepti¬ 
ble; the first discoidal vein very oblique to the rib vein, from its 
source to the base of the wing is less than three-fourths the distance 
from its tip to the base of the wing; second vein more oblique than 
the first, more than three times as far from the first at the tips as at 
the base; the third vein obsolete at the base. 
The position of the rib-vein, the obliquity of the discoidal veins, 
and the absoleteness of the third at the base, together with a slight 
difference in habits, are doubtlejs the reasons why this has been 
removed to another genus. 
Genus MYZOCALLIS. Pass. 
This genus which was evidently formed by Passerini to include some 
osculent species pertaking of the characters both of Chaitophorus and 
* Note—S ee Appendix. 
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