220 YORKSHIRE NATURALISTS UNION. 



of S.E. which has hitherto only one (Hull district). Of a 

 parasitic nature, forming large black patches which "when 

 present in considerable numbers on almost every leaf of the 

 tree, do considerable injury by preventing the leaves from 

 performing their proper functions " (Mass. Text-Book of 

 Plant Diseases, pp. 142-3, fig. 28). 



1504. Rhytisma punctatum (Pers.j. 



N.E. — Scarboro', on living sycamore leaves. Mulgrave 

 Woods (F.F., 1900). 



S.W.— Roche Abbey Valley (Lees' FL). Askern (F.F., '99). 

 Anston (T. Gibbs). 



N.W. — Masham (' Nat.', Jan. '02). 



In this species the black scab or crust is not continuous as 

 in R. aceviniim, but consists of closely crowded small pieces. 



1505. Rhytisma salicinum (Pars.). 



Mid W. — Church Fenton, on sallow leaves (Lees' FL). 

 N.E. — Scarboro'. Bulmer. On living willovz-leaves. 



1506. Rhytisma andpomedse (Pers.). 



S.W.— Thorne Waste (*' Nat.', Aug. '81). Goole Moor, 

 abundant (Lees' FL). Hatfield (Lees' FL Add.). Crowle 

 Moor, Goole (T. Bunker). 



On living leaves of Andromeda polifolia. 

 STIGMATEOID^. 

 HYPOSPILA Fr. 



1507. Hypospila bifrons (DC). 



N.E. — Scarboro'. Bulmer, on dead oak-leaves. 



1508. Hypospila ceuthospoPJoides (Berk.). [Splueria 

 centhospovoides Berk.] . 



S.W. — Roche Abbey, on cherry laurel (Lees' FL). 

 STIGMATEA Fr, 



1509. Stigmatea Robertiani Fr. 

 N.E. — Scarboro' (Tr. iv.). Bulmer. 



S.W. — Saltaire (Tr. iv.). Bingley (Lees' FL). Crimsworth 

 Dean (FL Hx.). Hebden Bridge. 



Mid W.— Gordale (Lees' FL). Woodhall Bridge (F.F., '98). 

 Bolton Woods (FL, Skipt.). 



Trans. Y.N.U., 1905 (pub. 1905). Bot. Series, Vol. 6. 



