1893.] NATURAL SCIENCES OF PHILADELPHIA. 449 



black disk which is soon obliterated, and surrounded by the ruptured, 



pustuliform-raised epidermis. Asci cylindrical short-stipitate, p. sp. 



90-100x8-10//, 8-spored, (paraphysate)? Sporidia uniseriate or 



sometimes partly biseriate, subacutely elliptical, hyaline, uniseptate 



and constricted at the septum, each cell with a single nucleus, 



15-20 x 7-8/./.. Melaneonium oblongum Berk., occurred on the same 



limbs. 



This differs from D. bicincta C. and P., in its more obscure stroma 



and larger perithecia, asci and sporidia. 



Diaporthe (Chorostate) Sambuci E. & E. 



On dead stems of Sambucus Canadensis, Ann Arbor, Mich., April, 

 1893. (L. N. Johnson, No. 483). 



Stroma cortical, consisting of the scarcely altered substance of the 

 bark, orbicular, convex, about 2 mm. diam., not circumscribed 

 either in the wood or bark. Perithecia 10-15, buried in the bark in 

 a subcircinate cluster, not at all sunk in the wood, 250-350// diam., 

 white inside, ovate-globose, their short necks converging and termin- 

 ating in a compact fascicle of stout, erect, cylindrical ostiola rounded 

 and subobtuse at the apex, perforating the epidermis and rising 

 slightly above it. Asci clavate-fusoid, 40-50x7// with obscure para- 

 physes. Sporidia biseriate, oblong-fusoid, 4-nucleate and with a 

 short, oblique hyaline appendage at each end at first, finally con- 

 stricted so as easily to separate in the middle, straight or slightly 

 curved, hyaline, 14-16 x 3-3 \;i.. 



The other species on Sambucus have the perithecia scattered or 

 gregarious and the sporidia not appendiculate. 



Diaporthe (Euporthe) micromegala E. & E. 



On dead herbaceous stems, (Desmodium) ? Wilmington. Del. 

 July, 1893. (Commons, No. 2309). 



Gregarious, sometimes 2 or 3 perithecia lying close together, $-$ 

 mm. diam., covered by the epidermis and only slightly sunk in the 

 substance of the stem. Ostiola filiform, bent or curved, about 1 mm. 

 long, very slender. Asci broad-fusoid, p. sp. 50 x 20//. Sporidia 

 conglobate, cylindric-fusoid, nucleate, subobtuse, not constricted, 

 nearly straight, 25-28 x 5-6//. 



D. magnispora E. and E., N. A. Pyr. p. 430 and D. megalospora 

 E. and E. , id. p. 446, both have larger sporidia, but besides the 

 different habitats, the former has clustered perithecia and the latter 



