24 
[ Vol. V. 
Journal New York. Entomological Society. 
posterior end of alimentary canal forms a blackish shade which looks 
like a mark at first glance. Thorax higher than head. Sits flat on the 
venter, usually curled spirally when at rest. Five stages were observed, 
but not consecutively. 
Found on the poplar at Plattsburgh, N. Y., and at Jefferson High- 
lands, N. H. 
Pontania populi Marlatt. 
This is evidently what Mr. Marlatt had in mind when he said of 
the habits of the larva; of Pontania , “ at least one America species de¬ 
velops in the rolled or folded edge of the leaf.”* The present species 
forms at first a small gall, but soon the leaf rolls over, gall and all, form¬ 
ing two or three turns and the larva lives in the tube so formed, without 
spinning any sort of web. 
There are probably five larval stages. The larva remains in the 
gall up to as late as the fourth stage, but is usually out to feed in the 
third. It may be in the rolled part permanently in stage IV. 
Gall.— A low irregular swelling on the upper side of the leaf, the 
nearest veins enlarged and tending to curve backward, rolling the leaf 
with the back side inward. Under side of gall thin, flat or irregularly 
rugose; above scarcely much thickened but folded up. Green or yel¬ 
lowish, an ill-defined swelling about 5 mm. in diameter, concealed in 
the rolled leaf. 
Stage II. _(In gall.) Head pale brown, paler over the clypeus; 
body shining whitish; width of head .36 mm. 
Stage III. —Head pale brown above clypeus; width .55 mm. 
Body annulate, shining, no marks; anal prongs dark. 
Stage IV. _Plead very pale brown ; width .7 mm. Body colorless. 
Stage V— (In leaf.) Head all pale brown ; width 1.0 mm. Body 
segments 3-annulate, whitish, scarcely shining, food green; two dusky 
brown corneous patches precede the dark tipped anal prongs. 
The larvae never eat the whole leaf, but the parenchyma only, even 
in the last stage. They spin small brown cocoons. 
Found on Populus grandidentata at Fort Lee, N. J. There is 
more than one brood in the season, the larvae infesting the successive 
leaves of young shoots. 
Pontania terminalis Marlatt. 
Allied to the preceding. Egg deposited under the lower epidermis 
forming a small gall-like swelling ol the type of P. populi, but less pro- 
* U. S. Dept. Agriculture, technical series, No. 3, 1896, p. 8. 
