126 NEW YORK STATE MUSEUM 



25 Small reddish or whitish flat woolen patches (erineum) on 

 the upper side of the leaves. 



Hagen '85, no. 30 (Erineum a 1 n i g e r u m) N.H. 



Differs from the preceding in position, but may be the same. 



Persoon '22, no. 1 1 describes an E . a 1 n i - i n c a n i under the 

 section Phyllerium that may be one of these forms. 



'''26 A small red pubescent pocket-gall on leaf. 



Jarvis '07, p.6o, third sp. Ont. 



Specimens from Shushan (F. Dobbin) and Remsen? (I. L. 

 Nixon), at first green or yellowish; doubtfully from Lyons pond, 

 Nassau, Rensselaer co. N.Y. 



This may be compared with the galls of Eriophyes laevis 

 (Nalepa) on Alnusglutinosa; see Connold 1901, British 

 Vegetable Galls, p. 140, pi. 54. 



Alnus rugosa (serrulata) (smooth alder) 

 '^2^ Small remote pocket-galls on the upper side of the leaf. 

 (Perhaps same as preceding). 



Hagen '85, no. 31 Western States 



A form agreeing fairly with this description, but more crowded 



and projecting on both sides of leaf, was collected between Albany 



and Schenectady. N.Y. 



Hagen's no. 32, '' a hypertrophy of the female aments by a 

 fungus," from the west, included in his list because Baron Osten- 

 Sacken thought it acarideous, is I believe now fully recognized as 

 a fungus-gall. This remarkable deformation has been collected on 

 Alnus i n c a n a at Lyons pond, Nassau, Rensselaer county, 

 N.Y. No mites were found in or on the gall. 



Amelanchier canadensis (service-berry) 



28 A dimple ( ?) similar to a Phrygian cap, with the tip rolled 

 down, on the upper side of the leaf, rarely below. Older stage ( ?) 

 larger, yellowish, tip open and woolly. 



Hagen '85, no. 33 and ? no. 34 Mass. 



Amelanchier rctundifolia ^ (round leaved Juneberry) 



29 Small, nearly globular, dark brown pocket-galls, averaging 2 

 mm in diameter, singly or. in clusters on the upper side of the leaf; 

 beneath pubescent and protuberant. 



Jarvis '08, p.92, second sp., pl.D, fig. i Ont. 



^ Jarvis erroneously refers this to A ni e 1 a n c h i c r canadensis in his 

 explanation of the plate. 



