248 PROCEEDINGS OF THE ACADEMY OF [1890. 



Nectria sulphurata. 



On dead wood of Fopuhis tretmdoides, Sand Coulee, Montana. 

 May, 1889. F. W. Anderson, No. 496. Perithecia gregarious, 

 minute {\ nun.) subglobose with a sliglitly contracted base, covered 

 witli a sulphur-yellow granulose-pruinose coat which finally dis- 

 appears and leaves the perithecia black ; collapsed above when dry 

 and more or less distinctly radiate-sulcate. Asci subcylindrical, 65 

 -70 X 6-7 !>: Sporidia subbiseriate, allantoid, hyaline, with a small 

 nucleus near each end, slightly curved, 9-12 x 2 //.. Differs from 

 N. aurea S. & S. in its smaller sporidia. 



Homostegia kelseyi. 



On dead stems oi' Elbes rotundifolia't Helena, Montana, Jan., 

 1889. Rev. F. D. Kelsey, No. 3. Sent also by Mr. F. W. Ander- 

 son, apparently on a different species of i?t6e5 (No. 398). ' Perithecia 

 gregarious or cespitose or united 3-6 together in an imperfect stroma, 

 often transversely seriate through cracks in the bark, ovate 2-1 

 mm. diam. with a conic or cylindric-conic, stout ostiolum which is 

 sometimes imperfectly radiate-sulcate. Asci cylindrical, 150-190 x 

 8-9 lu with paraphyses. Sporidia uniseriate, hyaline, oblong- 

 cylindrical 3-septate, straight, obtuse, 15-20 x 7-9 //. 



Dothidea bigeloviae. 



On dead stems of Bigelovia, Helena, Montana, Nov., 1888. Rev. 

 F. D. Kelsey, No. 141 . Stromata depressed-tubercular, suborbicular, 

 about 1 mm. diam smooth and black, gregarious, partly sunk in the 

 bark of the dead stems. Ascigerous cavities peripheric, minute, 

 numerous. Asci oblong 40-50 x 12 //. soon disappearing. Sporidia 

 subbiseriate, 1 — septate, constricted at the septum, 15-20 x 7-10 //. 



Plowrightia staphylina, E. <fc E. 



On bark of Staphylea trifolia, London, Canada, March, 1890. 

 Dearness, 1560. Cespitose, clusters of perithecia about 1 mm. diam. 

 mostly seriately confluent for several centimeters in length, erump- 

 ent through cracks in the bark and only slightly prominent. Peri- 

 thecia black, small, 150-200 fj-. diam. ovate or obovate, narrowed be- 

 low into a substipitate base. Ostiolum conic-papilliform, soon 

 broadly and somewhat irregularly perforated. Asci clavate-cylin- 

 drical, subsessile, paraphysate, 60-65 x 8 /jl. Sporidia mostly bi- 

 seriate, oblong or clavate-oblong, hyaline, 1-septate and slightly 

 constricted, 12-15 x 4-5 ,'i., ends obtuse. 



