Perithecia circlnate, few, nestling in the unaltered substance of 

 the hark and raising the epidermis into little pustules, small (150 /j.), 

 about four together, contracted above into slender necks terminating 

 in the short, inconspicuous ostiola, wliich barely rupture the epidermis 

 without projecting above it. Asci oblong 25-30 x 5-6 ft. Spoi-idia 

 liiseriate, oblong-sublanceolate, slightly curved, 2-4-nucleate, unisep- 

 tate, hyaline, 6-7 x 1^-2 ;/ (1 8 x5 /i, Cke.). 



On dead limbs of My ric a, Darien, Georgia (Ravenel). 



This discrepancy between Cooke's measurements and otirs is 

 remarkable. We have carefully examined the specc. in Kav. F. Am., 

 and find the sporidia as stated above. 



D. Woolworthii, (Pk.) 



yalsa Wovlworthii, Pk. 28th ReJ). p. 73. 

 Diaporthe Woolworthii, Sacc. SyU. 2383. 



Minute, erumpent Perithecia 2-6 together, nestling in the innef 

 Ijark. Ostiola stout, becoming umbilicate, crowded, slightly prominent, 

 barely exserted through the ruptured epidermis. Asci p. sp. 30-35 x 

 7 ji. Sporidia crowded or biseriate, oblong-fusoid, uniseptate, scarcely 

 constricted, nearly colorless, 10-12 x2|-3| ^. 



On dead oak and hickory branches, Greenbush, N. Y. (Peck), on 

 oak and Tilia, Canada (Dearness). 



The clusters of perithecia are very numerous and often seriate, 

 the epidermis being ruptured from one to another. What appears to 

 be the same has beeir sent by Mr. Langlois from Louisiana, on dead 

 "limbs of white oak, with the ostiola at first erumpent through a pale 

 disk which at length disappears. 



D. farinosa, Pk. 40th Rep. p. 69. 



Stroma subpulverulent or mealy, dull buif color, formed of the 

 slightly changed inner bark, enimpent in a minute, slightly exserted 

 disk. Perithecia irregularly circinating, generally 4^10 together, the 

 clusters subconfluent. Ostiola black, dotting the prominent, pulveru- 

 lent, buff-colored or, at length, brownish disk. Asci subcylindrical, 

 65-75x7^-10//. Sporidia crowded or biseriate, oblong or subfusi- 

 form, uniseptate, generally 4-nucleate, 15-20 x3|-4 ji. 



On dead branches of Tilia Americana, Argusville, N. Y. (Peck). 



This species approaches D. furfuracea in its pulverulent stroma, 

 but differs in its prominent disk, making the branches rough to the 

 touch, and in its smaller sporidia.' From D. velata it is easily sepa- 

 rated'by the entire absence of any black, circumscribing line or black- 

 ened surface. It evidently belongs to the subgenus Chorostate, but 

 the clusters of perithecia are so numerous that they form an almost 



