18 Department Circular 195, U. S. Dept. of Agriculture. 



225. M. medusae Thuem. — II and III, 



on Populus tremuloides. 

 Bozeman, Mont., Sept. 4, 1913, 

 E. T. and E. Bartholomew. 

 Dupl. F. Col. 4329. 



226. M. occidentalis Jackson — II and 



III, on Populus oalsamifera. 



226. M. occidentalis — Continued. 



Bellingharn, Wash., Aug. 25, 

 1916, J. R. Weir. 



227. M. occidentalis Jackson — II, on 



Populus trichocarpa. 

 Duckabush River, Wash., Aug. 

 12, 1912, E. Bartholomew. 



MELAMPSORELLA. 



228. Melampsorella caryophyllacea- 



rum Schr. — I, on Picea en- 



gelmanni. 



Coolin, Idaho, July 30, 1914, 



J. R. Weir. Dupl. N. A. Ured. 



1620. 



MELAMPSORIDIUM. 



229. Melampsoridium betulinum 230. M. betulinum (Tul.) Kleb. — II, 



(Tul.) Kleb. — II, on Betula on Betula pumila, 



lutea. Arnold Arboretum, Jamaica 



Indiana, Aug. 12, 1903, W. A. Plain, Mass., Sept. 23, 1892, J. G. 



Kellerman. Jack. 



PHRAGMIDIUM. 



231. Phragmidium americanum 



Diet. ( ?) — III, on Rosa sayi. 

 Kennedy, Nebr., Aug. 25, 1911, 

 J. M. Bates. 



232. P. andersoni Shear— II and III, 



on Potentilla fruticosa. 

 Gunnison County, Colo., Aug. 

 23, 1899, E. Bartholomew. 



233. P. andersoni Shear— III, on Po- 



tentilla fruticosa tenuifolda. 

 Sentinel Butte, N. Dak., Aug. 

 30, 1916, J. F. Brenckle. Dupl. 

 F. Dak. 408. 



234. P. imitans Arth. — III, on Ruous 



idaeus aculeatissimus. 

 Steamboat Springs, Colo., Aug. 

 29, 1914, E. Bartholomew. Dupl. 

 F. Col. 4554; N. A. Ured. 1622. 



235. P. montivagum Arth. — II and 



III, on Rosa woodsii. 

 Centennial, Wyo., Aug. 16, 

 1911, E. T. and E. Bartholomew. 

 Dupl. F. Col. 3729. 



236. P. occidentale Arth. — III, on 



Ruous parvif Torus. 

 Glacier, British Columbia, 

 Canada, Sept. 3, 1902, E. W. D. 

 Holway. Dupl. N. A. Ured. 1513. 



237. P. potentillae (P.) Karst. -Ill, 



on Potentilla pennsylvan- 

 ica. 

 Sandcoulee, Mont., July, 1888, 

 F. W. Anderson. Dupl. N. A. 

 Ured. 810. 



238. P. rosae-arkansanae Diet. — III, 



on Rosa virginiana ( ?). 

 Oregon, 111., Sept. 10, 1889, M. 

 B. Waite. Dupl. 1902 Myc. Ex. 

 50d as P. subcorticium. 



239. P. rosae-californicae Diet. — II 



and III, on Rosa califomica. 



Santa Catalina Island, Calif., 



July 19, 1915, E. and Mrs. E. 



Bartholomew. Dupl. N. A. 



Ured. 1823. 



240. P. rosae-californicae Diet. — III, 



on Rosa nutkana. 

 Portland, Oreg., Aug. 23, 1915, 

 E. Bartholomew. Dupl. N. A. 

 Ured. 1626. 



241. P. rosae-setigerae Diet. — II, on 



Rosa Carolina. 

 Near Midland, Ontario, Can- 

 ada, July 5, 1912, J. Dearness. 



