88 NEW YORK STATE MUSEUM 



Melampsoropsis ledicola (Peck) Arthur 

 (Peridermium decolorans Peck) 

 Newcomb, Essex county, on needles of Picea mariana 

 (Mill.) B. S. P., and Picea canadensis (Mill.) B. S. P., 

 H. D. House, July 28, 192 1. This rust is found generally distri- 

 buted throughout the Adirondack region in most swamps where 

 spruce and Labrador tea (Ledum groenlandicum) occur 

 together, and also locally elsewhere across the State. 



Melampsoridium betulae (Schum.) Arthur 

 On leaves of the gray birch, Be tula populifolia 

 Marsh., Averill Park, Rensselaer county, H. D. House, October 

 3. Practically every leaf on a small tree, about 2 inches in 

 diameter, was found to be heavily infected. The tree grew 

 almost in the shade of a white pine, and a few hemlocks and 

 pitch pines grew within a short distance. The aecial stage of 

 this rust occurs upon Larix laricina, a species which 

 is not known to occur within a mile of this spot. No infection 

 was found on any of several other gray birches close by. 



Metasphaeria Peckii (Speg.) Sacc. 

 (Sphaerella Peckii Speg.) 

 On fallen leaves of June berry, Amelanchier spicata 

 (Lam.) C. Koch, near New London, Oneida county, H. D. House, 

 May 17, 192 1. Peck's original collection of this from near 

 Albany contains what appears to be leaves of both A . 

 spicata and A. canadensis. 



Micropuccinia conglomerata (Strauss) Arthur & Jackson 

 (Puccinia nardosmiae E. & E.) 

 On leaves of Petasites palmata (L.) A. Gray, near 

 Newcomb, Essex county, H. D. House, June 15 and July 21, 

 1921. This rare rust has not heretofore been reported from 

 New York, and Doctor Arthur states that it has been found 

 only at the following American stations : Vermillion Lake, 

 Minn., Stittsville and Nipigon River, Ontario and Glacier, 

 British Columbia, all on the same host. In Europe it is 

 recorded as occurring upon several species of S e n e c i o , 

 Cacalia,Adenostylis and Homogyne. 



