182 ANNALS OF SCOTTISH NATURAL HISTORY 



Aberdeen, and no doubt elsewhere in Scotland ; but perithecia 

 have not been found on it. The Oidium on apple has also 

 been referred to Sphcerotheca Castagnei. 



SPHJEROTHECA HUMULI (DC.}, Burr. ( = S. Castagnei, Lev. + ,S. 

 Epilobii, Link). 



var. FULIGINEA (Schlecht}, ( = S. Castagnei on Taraxacum 

 officinale). 



S. PANNOSA (Wallr. \ Lev. 



UNCINULA SALICIS (DC.), Winter. 



U. ACERIS (DC.}, Sacc. 



U. PRUNASTRI (DC.}, Sacc. 



MICROSPH^ERA BERBERIDIS (DC.}, Lev. 



M. ASTRAGALI (DC.}, Trcv. ( = Erysiphc Astragali, DC.}. 



M. ALNI (Wallr.}. 



M. GROSSULARI/E (Wallr.}, Lev. 



M. BAUMLERI, MAGNUS, on Vicia sylvatica, was detected by Salmon 

 in Herb. Berkeley at Kew, on a specimen labelled " New 

 Pitsligo " (no doubt gathered in Aberdour where the vetch 

 abounds), under Erysiphe communis. The characters of the 

 species are quoted below. 



ERYSIPHE POLYGONI, DC. ( = E. Martii, Lev. + E. Umbelliferarum, 

 De By, + E. communis (Wallr.), Fr. + Oidium Balsamii, on 

 turnips). 



E. CICHORACEARUM, DC. ( = E. Cichoracearum, DC. + E. Linkii, 

 Lev.). 



E. GALEOPSIDIS, DC. 



E. GRAMINIS, DC. 



PHYLLACTINIA CORYLEA (Pers.}, Karst. ( = P. gnttata, Lev.). 



We thus have in Scotland 1 5 of the species and 2 of 

 the varieties in the sense accepted in this monograph, while 

 several species of my Revision are regarded as synonyms. 



Of several that I named as to be looked for in Scotland, 

 because of their recorded distribution elsewhere, the following 

 are sunk by Salmon in species included in the above 1 5 

 viz. : 



Sphcerotheca Nieslii, Thiim., on Pyrus Aria, and S. fugax, Penz. and 

 Sacc., on Geranium silvaticum, are referred to S. Humuli. 



S. detonsa, Kickx, on Apargia, and on Tanacetum, to S. Humuli 

 var. fuliginea. 



