616 



On tliallus of Parmelia saxatilis, Rhode Island (Farlow), Penn- 

 sylvania (Eckfeldt). 



The measurements are from Far low's specimens and are smaller 

 (for cells and asci) than those of Dr. Winter. 



H. Magnolise, (Cke.) 



Dothidea Magnolice, Cke. Grev. VII, p. 50. 

 Homostegia Magnolicz, Sacc. Syll. 5342. 

 Exsicc. Rav. F. Am. 386. 



Epiphyllous, scattered, black, elliptical or angular, flattened-con- 

 vex, rugose. Asci clavate-cylindrical. Sporidia cylindrical, obtuse, 

 slightly curved, triseptate, hyaline, 20 x 5 fi. 



On leaves of Magnolia, Darien, Ga. (Ravenel). 



We have not been able to find any fruit in the spec, in Ravenel's 

 F. Am. and can only copy the description from Grevillea. 



H. rugodisca, (Cke. & Hark.) 



Dothidea rugodisca, Cke. & Hark. Grev. IX, p. 87. 

 Homostegia rugodisca, Sacc. Syll. 5343. 



Hypophyllous, spots irregular, brown. Cells angular, flattened, 

 rugose, crowded. Asci subclavate. Sporidia rounded above, attenu- 

 ated below, triseptate, hyaline, 16-17 x 4 jut. 



On leaves of Arbutus Menziesii, California (Harkness). 



H. Kelseyi, E. & E. Proc. Acad. Nat. Sci. Phil. June, 1890, 

 p. 248. (Plate 40) 



Perithecia gregarious or cespitose, or united 3-6 together in an 

 imperfect stroma, often transversely seriate through cracks in the bark, 

 ovate, |-| mm. diam., with a conical or cylindric-conical, stout osti- 

 olum which is sometimes imperfectly radiate-sulcate. Asci cylindrical, 

 150-190 x 8-9 jut, with paraphyses. Sporidia uniseriate, hyaline, ob- 

 long-cylindrical, 3-septate, straight, obtuse, 15-20x7-9 fi. 



On dead stems of Ribes rotundifoliaf Helena, Montana. 



This species, on account of the scanty stroma and often nearly 

 free perithecia, seems allied to the Cucurbit ariece or Melogramrnece, 

 but in some cases the perithecia are entirely buried in the stroma, as 

 in genuine Dothideacece. 



H. gangnena, (Fr.) 



Sphceria gangrcena, Fr. in Duby Bot. Gall. II, p. 695. 

 Phyllachora gangrcena, Fckl. Synib. p. 217. 

 Splicer ella gangrcena, Karst. Myc. Fenn. II, p. 185. 

 Homostegia gangrcena, Winter, Die Pilze, II, p. 917. 

 Fxsicc. Fckl. F. Rh. 2261. Rav. Car. II, No. 59. Desm. Pi. Cr. Ed. I, 1267. 



Stromata gregarious or scattered, irregularly elongated, 3-5 mm. 



