REPORT OF THE STATE ENTOMOLOGIST 1907 143 
Quercus platanoides (bicolor) (swamp white oak) 
115 Very small pocket-galls, crowded upon the upper side of the 
leaf. 
Hagen ’85, no. 64 Conn. 
Quercus rubra (red oak) 
*t16 A brown erineum on the under side of the leaf. Trichomes 
fine, simple, matted. The mites are very numerous, white or pinkish. 
Specimens from the Indian Ladder, Helderbergs (Mr Burn- 
ham). INDE 
Specimens in the State Herbarium from Sand Lake (Professor 
Peck), and a single loose leaf without data, marked “E. quer- 
¢inum probably,” have larger patches with some light or whitish 
portions. See our no. 118, and the following. 
Quercus velutina (black oak) 
*117 A velvety red erineum on the under side of the leaf, the 
young parts greenish. Trichomes simple, matted. 
Specimens in the State Herbarium from Buffalo (Mr Clinton) 
labeled, 1b rim Swim Gt er Clim wl in IN| Ne. 
Although more brilliantly colored than the preceding it is struc- 
turally the same with that, with no. 114, and probably also no. 111. 
Whether these are the true Erineum quercinum I can not 
determine; see the following. 
Specimens from South mountain, Catskills. INN: 
Quercus sp. 
118 LBrinetim @uUerciminwn ILialk mo, 7, ~ in mols. 
Schweinitz 34, no. 2796 mae 
Placed in Phyllerium, having simple trichomes. Persoon ’22, 
no. 5, describes this as “cespitulis immersis laxis rufescente- 
pallidis nitidis. Fila compressa, intricata, mollia. Hab. in fol. 
Owecrceus PwUbEeESCemiis, Plinvilleritiin Gherenimpian 
Kunze.” This agrees passably with the preceding forms referred 
LOntabDy Proresson meck (10S, P14, 116,117). 
11G Drimewim G@LERECUS=ClmOrEA eS Seayewny (Go, ©): 
Schweinitz °34, no. 2801 NEC? 
Placed in Phyllerium, the trichomes therefore simple, 
