1890.] NATURAL SCIENCES OF PHILADELPHIA. 285 



hyaline. Accompanied by sperraogonia with minute allantoic! spox'es 

 in a multilocular grayish-black stroma in pustules similar to those 

 containing asci and sporidia. The ascigerous perithecia finally fall 

 out (or are eaten out by insects) ? 



Liaporthe americana, Speg. 



On dead shoots of 3Iagnolla glauca, Newfield, N. J., Jan., 1889. 

 Perithecia buried in the inner bark and partly sunk in the wood 

 about 2 mm. diam. whitish or horn-color inside, the thin cylindrical 

 ostiola either singly or oftener converging and bursting through the 

 ruptured epidermis but scarcely projecting above it, their tubercu- 

 lar-cylindrical tips rounded and obtuse and more or less distinctly 

 quadrisulcate-cleft. The stroma is formed of the unchanged sub- 

 stance of the wood which it penetrates deeply and is limited by a 

 black circumscribing line. The perithecia are either irregularly 

 scattered or in groups of 4-8. Asci 40-50 x 6-7 //. without any 

 distinct paraphyses. Sporidia oblong-fusoid, hyaline, 2-3-nucleate, 

 finally 1-septateand slightly constricted, 10-12 x 3 //. This agrees 

 fairly well with the description of Spegazzini's species. 



Diaporthe megalospora. 



On dead wood of Savibueus Canadensis, Manchester, Mass., July, 

 1889. Wm. C. Sturgis. Perithecia globose, i-f mm. diam. scat- 

 tered, buried in the wood which is blackened on the surface but re- 

 mains white within, abruptly contracted above and prolonged into 

 a long (2-3 mm.) rough, subflexuous ostiolum. Asci (p. sp.) 70-90 x 

 10-12 ,«. Sporidia biseriate, oblong-fusoid, slightly curved, 1-sep- 

 tate and constricted at the septum, each cell with 1 or.2 large nuclei, 

 acute at the ends, 25-35 x 42-55 p.. Narrower than in D. leuco- 

 sarca. 



Didymosphaeria andropogonis, Ell. & Lang. 



On dead culm of Androj^ogon muricatus, St. Martinsville, La., 

 July, 1889. Langlois, 1814. Stroma consisting of the nearly un- 

 changed substance of the culm which is a little whiter than the sur- 

 rounding parts, 3-4 cm. long, 1 cm. broad, surrounded by a green- 

 ish-black line which penetrates deeply, the surface also being of a 

 uniform slaty-black. Perithecia scattered, subglobose J-f mm. 

 diam., entirely buried except the convex-discoid, erumpent ostiolum. 

 Asci cylindrical about 110 x 8-10 ,'j.. with stout but evanescent par- ■ 

 aphyses. Sporidia uniseriate, oblong-cylindrical, rounded at the 



