American Insect Galls: Thompson 53 



208. Cecidomyia umbellicola. O. S. '70, ji. 52. Elder, Sambucus canadensis. Mass. June. 

 On umbels of poninion elder; scattered huds are enlarged to white capsules. Larva 

 2 mm. long, orange, plate S, 208. 

 Youngomyia umbellicola O . S. 



217. Puccinia. Sambucus canadensis. Mass. June. Midribs of leaf, petiole and peduncles. 

 2 X 1-4 in. in diameter. Yellow from cluster cups of rust. 



298. Eriophyes. Sambucus canadensis. Mass. Sept. Some of terminal leaves dwarfed. Mar- 

 gins of leaves involute so that the under surface is exposed to view from above. 

 This roil is more hairy than the normal. 



Arthrocnodax sambucifolia Felt. Probably preying on Eriophyes, deforming the leaves. 



ELM (Ulmus) 



25. Colophaulmicola = Elm Cockscomb. White elm, Ubnus americajijis. Mass. June. L^pper 



side of leaf light green with brown summit-orifice elongate, plate 8, 25. 



26. Cecidomyia ulmi. Beut. '07, p. 387, pi. 13, fig. 5, cf 9 , Ulmus americanus. June, July. 



Mass. Warts at base of lateral veins distorting young ueaves. Rib gall, plate 

 10, 26. 



Phytophaga ulmi Beutm. 



187. Eriophyes ulmi. Packard '90, p. 281-282. White elm, Ulmus americana. Mass. June. 



On leaf; finger-like protuberances above and depressed area below with mouth 



fringed by white hairs. Closely resembles No. 181 on linden. 

 211. Pemphigus ulmi-fusus. Cook '05, p. 849. Elm. Mass. June-July. On upper side of 



leaves of Ulmus fulnus. From 1-5 cm. in height. Summit pointed or indented. 



Mouth very small with thin, leathery walls, plate 9, 211. 

 Pemphigus ulmi-fusus Walsh. 



FERN 



191. Tineidae. Pteris aquilina. Mass. June. Lateral stem swells and curls over making a 

 bunch of the frond veins. 



GRAPE (Vitis) 



18. Crimson Button of Grape. June, July, Aug. Mass. Elevation with apical tuft of pu- 



bescence which is ensanguined, plate 8, 18. 



19. Phytoptus vitis (Landois). Elevated gall of grape leaf. June. Mass. 'S'arious grapes, 



plate 9, 19. 



Coleopterous, taken at Syracuse and Newport, N. Y., unknown. 



27. Lasioptera vitis. O. S. '67, p. 201. Grape tendrils, stems and leaves. Late August, plate 



9, 27. 



144. Eriophyes. Grape leaf. Mass. Red patches of clavate hairs on upper side of leaf. 



232. Cecidomyia viticola. 0. S. '67, p. 202, Riley, '70, p. 113-114. Grape leaf. ' Mass. Aug. 

 Cylindrical, tapering to a tip which is often decurved; faint, longitudinal ribs, color 

 . green and very ruddy. Length 5-8 mm. Diameter at base 3 mm., occasionally 

 larger, plate 10, 232. 



275. Cecidomyia pomum. Walsh '69, p. 106, Riley '73, p. 114. Grape. Mass. Aug. Prob- 

 ably modified loaf or tendril, like hazel nut when small, when large oval ami heavily 

 ribbed, green, succulent, i)olytlialamous, jilate 9, 275. 

 Schizmnyia pomum Walsh. 



