22 EEYTHEA. 



Pustules small (1 — 2 mm.), gregarious or subconfluent. 

 Peritliecia subcircinate, 6 — 12 in a group, ovate-globose or 

 angular from mutual pressure, wliitish inside, 176 — 200/f 

 diam., buried in the unaltered substance of the bark which is 

 raised into broad pustules or swellings and perforated by the 

 small, black, depressed-tuberculiform disk including the 

 papilliform ostiola. Asci cylindrical, paraphysate, 8-spored, 

 short-stipitatejlOO — 112x8 — 10 ja. Sporidia uniseriate, oblong- 

 elliptical, hyaline, 1 — 3-septate, not constricted, obtuse, 

 15—20x7 — 9/i. Accompanied by a Phoma with black, tuber- 

 culiform perithecia more or less distinctly erumpent, white 

 inside, with sporules 3—4x1^ — 2/^. 



Dothidea Cercocarpi, E. & E. 



On leaves of Cercocarpiis ledifolmsj Mt. San Antonio, 

 Calif., Aug., 1893. A. J. McClatchie, No. 373. 



Stromata hypophyllous, black, 



i 



mm. diam.), mostly collected and connate so as to form a 

 compound stroma ^ — I mm. diam., with the surface mammil- 

 lose. Ascigerous cells irregular in shape , 130 — 170/f diam, 

 Asci oblong-clavate, short-stipitate, 75 — 85x18 — 20//, with in- 

 distinct paraphyses, S-spored. Sporidia crowded-biseriate, 

 overlapping or irregularly crowded, oblong-cylindrical, uni- 

 septate, scarcely constricted, dark yellow, 18 — 25x8 — 10//, 

 rounded and obtuse at the ends, lower cell mostly a little 

 smaller, much like the sporidia of Doihidea collecta, Schw. 



Hysterographium Kansense, E. & E. 



On bark of Quercus macrocarpa, Eockport, Kansas, Feb., 

 1893. Bartholomew, No. 922. 



Perithecia scattered, oblong, ends subacute, l~l|x^ mm., 

 black, subconchiform, longitudinally striate, lips closed or 

 slightly open so as to leave a narrow cleft. Asci clavate- 

 cylindrical, 80—110x12—14//. Paraphyses abundant, fili- 

 form, evanescent. Sporidia subbiseriate (overlapping), cla- 

 vate-oblong or fusoid-oblong, subobtuse, 7— 9-septate, with 

 most of the cells finally divided by a longitudinal septum, 

 brown, 25— 30x8— 10//. 



