Pontania populi

Type locality. — New York

Host plant. — Populus grandidentata Michx.

Notes. — A valid species, Pontania {Pon- tania) popidi Marlatt, belonging to the crassispina group. The larvae and biology were described by Dyar (1897a). It produces leaf rolls on the host creating a small swelling (procecidium) at the site of egg laying. There is more than one generation per year. The larvae eat the parenchyma and leave the upper cuticle intact, which is typical for species of the crassispina group. A very slight ventroapical indentation of the sheath (Fig. 11) and the leaf-folding habit led to the inclusion of this species in Phyllocolpa by Smith and Fritz (1996).