REPORT OF THE STATE ENTOMOLOGIST I907 1 37 



Specimens from West Athens referred to this, appear as button- 

 Hke knobs slightly constricted at base and widely open below. 

 Trichomes coarsely granular and distorted. The whole green when 

 fresh, turning brown. Also from North mountain, near the Catskill 

 Mountain House. N.Y. 



Populus heterophylla (downy poplar) 



85 (?) A rib-gall on the main vein, believed to be Phytoptid. 

 Specimen from Newfoundland village (L. H. Joutel). N.J. 



Populus nigra, var. italica (Lombardy poplar) 



86 A large deep, sharply defined dimple, green, orange-yellow 

 within, 4 to 12 mm in diameter, 2 to 5 mm deep, convex toward 

 the upper surface of the leaf. 



Jarvis '08, p.93, third sp., pi. D, fig. 3 Ont. 



Populus tremuloides (American aspen) 



"87 An olive-bufif to olive-brown erineum or dimple, slightly 

 indented on the under side of the leaf, up to 6.5 mm in diameter, 

 one to eight of these on a leaf. Trichomes coarsely capitate or 

 calyculate. 



Specimens from Albany, and in the State Herbarium from 

 Shandaken (Professor Peck) labeled Erineum a u r e u m , and 

 " neither a u r e u m nor p o p u 1 i n u m according to Greville," 

 and from Center, now Karner, Albany county (Peck) labeled 

 E. aureum, and "not like aureum as figured in Greville." 



N.Y. 



Erineum aureum Persoon '22, no. 23, is described from 

 Populus nigra and P. fastigiata and placed in the sec- 

 tion Taphria (Taphrina) having the trichomes fused into a crust; 

 it is evidently different from this. 



Erineum populinum Persoon '22, no. 20, placed undei 

 Grumaria with trichomes capitate, is described from P. t r e m u 1 a 

 as /' cespitulis orbicularibus immersis grumosis opacis spadiceis," 

 which agrees passably with the present form. 



88 Dimples '' on the leaves on the upper side lined with. spherical 

 granules, reddish or greenish in color." The galls are green, three 

 to four to a leaf, 2 to 3 mm in diameter. 



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



May be the same as the preceding, but the description is am- 

 biguous and gives the impression that this gall is the reverse of that. 



