142 



year of the Proceedings of the Academy, where additional i:iformation 

 can be found. Tlie nomenclature for hosts is that of B.-itton and 

 Brown's "Illustrated Flora of the Northern States and Canada." 



The present list contains 105 species of plant rusts under sixteen 

 genera, being an increase of more than 83 per cent, over the previous 

 list of 1898, which contained SO species under ten genera. 



COLEOSPORI ACE^. 



1. COLEOSPOKIUM SONCHI-ARVENSIS ( P^'CS. ) 1(7///. 



On Hieracium scabrutn Michx. Vigo Co., 5, 1893 (Underwood). 



2. CoLEOSPORiUM Ipoiiai:.g<: {Schir.) Bur. 



On Ipomoea pandurata (L.) Mey. 1896:171, 218. 



3. COLEOSPOKIUX SOLIDAGINIS (»SV7///. ) ThnPiu. 



On Aster azureus Liudl. 1893:50. 



On Aster cordifolius L. 1893:51. 



On Aster Novae Angliie L. 1893:51. 



On Aster paniculatus Lam. 1893:51. 



On Aster puniceus L. 1893:51. 



On Aster sagittifolius Willd. 1893:51. 



On Aster salicifolius Lam. 1893:51. 



On Aster Shortii Hook. 1893:51. 



On Aster Tradescanti L. 1893:51. 



On Solidago arguta Ait. 1893:51. 



On Solidago caesia L. 1893:51. 



On Solidago Canadensis L. 1893:51. 



On Solidago ftexicaulis L. (S. latijolin L. ) 1893:51. 



On Solidago patula Muhl. 1893:51. 



On Solidago rugosa Mill. 1893:51. 



On Solidago serotina Ait. 1893:51. 



4. CoLEOSPORiUM Vernoni.e B. & C. 



On Vernonia fasciculata Michx. 1893:51. 



On Veruonia Noveboracensis (L. ) Willd. 1893:51. 



MELAMPS0RA0E.3E. 



5. Chrysomyxa albida Klihn. {Colcoxporintn Rnhl E. &. II.) 



On Rubus cuneifolius Pursb. 1893:50. 

 On Rubus villosus Ait. 1893:50. 



