525 



There may be some doubt whether this is sufficiently distinct from 

 Hercospora Tilice, Tul., but on account of the longer, narrower spo- 

 ridia, the elongated ostiola and absence of the green disk, it may claim 

 specific rank. The pycnidial stage also (N. A. F. 2522), though not 

 well developed, does not agree well with Rabenhorstia Tilice. The 

 stroma is smaller and the stylospores more elongated. 



M. salicina, E. & E. Proc. Acad. Nat. Sci. Phil. July, 1890, p. 236. 



Exsicc. EH. & Evrht. N. A. F. 2d Ser. 2523. 



Stroma flat, thin, orbicular, about 2 mm. diam., composed of the 

 slightly altered substance of the bark, which is not perceptibly elevated 

 above it, surrounded by a black circumscribing line, which does not 

 penetrate below the surface of the wood. Perithecia 3-6 (exception- 

 ally only one) in a stroma, large (f mm.), globose, membranaceous, 

 with a light-colored nucleus, contracted above into short necks, which 

 terminate in rather broad, round, concave ostiola piercing the epi- 

 dermis, but scarcely rising above it. Asci broad-lanceolate, 90-110 x 

 12-16-/^ (p. sp.), with abundant paraphyses. Sporidia crowded-bise- 

 riate, oblong-fusoid, uniseptate and slightly constricted, a little bent or 

 curved, 40-60x8-10 ,u, yellowish-hyaline, with a short, obtuse, apic- 

 ulus at each end. Spermogonia in a ceutral perithecium in the middle 

 of the stroma. The bases of the perithecia are sunk in the surface of 

 the subjacent wood. 



On dead limbs of Salix, London, Canada (Dearness). 

 M. dolosa, (Fr.) 



Sphczria dolosa, Fr. S. M. II, p. 405. 

 'Valsaria dolosa, De Not. Sfer. Ital. p. 57, tab. 54 A. 

 Melanconis dolosa, Sacc. Syll. 2348, Cke. Syn. 2055. 



Perithecia 2-5 together, circinate, depressed-globose, contracted 

 into a short, thick, often excentric neck. Ostiola converging, obtuse 

 and perforated at the tips, .only slightly projecting above the pale, 

 roundish, erumpent disk. Asci elongated-clavate, narrowed below, 

 8-spored, without any distinct paraphyses. Sporidia oblong or oblong- 

 subclavate, rounded at the ends, septate in the middle, hyaline, 25 i 

 long. 



This diagnosis is from Winter's Pilze, translated by him from 

 Notaris, who is supposed to have examined an original specimen from 

 Fries. Found (sec. Schw.) on branches of Celastrus, in Xorth Caro- 

 lina. Apparently both this and Valsa dolosa (see p. 481) were in- 

 cluded in the Sphceria dolosa, Fr. 



