. Annual report. New York State Museum; Science -- New York (State); Plants -- New York (State); Animals -- New York (State). •KEY TO AMERICAN INSECT GALLS 39 Longitudinal fold galls dwarfing the leaf. Fig. 42. Itonid. Cecidomyia sp. Light red, cockscomb-like gall developing on the upper surface from the mid- vein. Pack. '90, p. 472 Aphid. Pemphigus populi-venae Fitch A rib gall on the main vein, on P. heterophylla. Chad. '08, p. 137 Acarid. ? Eriophyes sp. Irregularly folded, convolute mass of foliage some 2 inches in diameter, frequently apical. Fig. 43- Felt 'o6b, p. 635 Aphid. Vagabond gal


. Annual report. New York State Museum; Science -- New York (State); Plants -- New York (State); Animals -- New York (State). •KEY TO AMERICAN INSECT GALLS 39 Longitudinal fold galls dwarfing the leaf. Fig. 42. Itonid. Cecidomyia sp. Light red, cockscomb-like gall developing on the upper surface from the mid- vein. Pack. '90, p. 472 Aphid. Pemphigus populi-venae Fitch A rib gall on the main vein, on P. heterophylla. Chad. '08, p. 137 Acarid. ? Eriophyes sp. Irregularly folded, convolute mass of foliage some 2 inches in diameter, frequently apical. Fig. 43- Felt 'o6b, p. 635 Aphid. Vagabond gall. Pemphigus vagabundus Walsh Irregular, pinkish and light green, pod-shaped shelters formed by apposed leaf edges and containing numerous white plant lice, length to 3 cm, diameter I cm, on Lombardy poplar. Aphid. Purse leaf gall, P'e mphigus affinis Fig. 44. Ribbed petiole gall, Ectoedemia popu- 1 e 11 a Busck. (Original) An olive buff to olive brown erineum or dimple, slightly indented on the under side of the leaf, diameter mm or less, one to eight on a leaf. Chad. '08, P- 137 Acarid. Eriophyes sp. Dimples " on the leaves on the upper side, lined with spherical granules, reddish or greenish in ; The galls are green, 3 or 4 on a leaf, diameter 2 to 3 mm, possibly identical with the preceding. Chad. '08, p. 137 Acarid. Eriophyes sp. White to dark brown erineum or dimple gall on the under side of the leaf of P. grandidentata. Chad. '08, p. 136 Acarid. Eriophyes sp. A small, green or red, pocket gall on the upper side of the leaf of P. grandidentata. Chad. '08, p. 136 Acarid. Eriophyes Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York State Museum; University of the State of New York. Albany, N. Y. : University of the State of New York


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