370 PROCEKDINGS OF THE ACADEMY OF [1894. 



Perithecia erumpent - superficial, gregarious, membranaceous, 

 yellowish-brown and pustuliform when fresh, collapsing to concave, 

 nearly flat when dry, and then darker colored, the disk or center 

 with a faint, flesh-colored tint, 4-3 mra. diam. Sporules globose, 

 6—8,'j- diam., yellowish, with a tinge of rose color. 



Difi'ers from H. effugietis S. & E. in its different habitat and the 

 darker color of the perithecia. 



Dothichiza Cassandrae E. & E. 



On dead limbs of Cassandra ealyeulata, Ann Arbor, Mich., May, 

 1894 (L. N. Johnson, No. 1,591)'. 



Perithecia erumpent, surrounded by the ruptured epidermis, ovate- 

 globose and closed at first, i mm. diam., then irregularly ruptured 

 and subcupulate, '. mm. diam. Sporules fusoid, hyaline, continu- 

 ous, straight, acute, 10-14 x2-2i'/. 



Apparently the spermogonia stage of Cenangium Cassandrce Pk. 

 Gloeosporium tremuloides E. & E. 



On leaves of Populus tremuloides, Racine, Wis., Sept. 1893 (Dr. 

 J. J. Davis). 



Spots amphigenous, suborbicular, scattered or subcoufluent, defi- 

 nite, dark brown, 2-4 mm. diam. Acervuli innate, globose or ob- 

 long, 75-85". diam. , dark, erumpent on both sides of the leaf, often 

 C'jvered above by the loosened, silvery epidermis. Conidia elliptical, 

 10-13x52—6 2;/., continuous. G. Treiniike, G. Sihiricum, and G. 

 Populi-albce, have fusoid or cylindrical conidia ; G. )icevioides Romell 

 & Sacc. Grev. 21, p. 68, has ovate-oblong conidia, 30-85x10-12//, 

 so that this seems sufficiently distinct from all the other species on 

 poplar leaves. 



Gloeosporium officinale E. & E. 



On leaves of Sassafras officinale, Smyrna, Del., June, 1894 (Com- 

 mons, No. 2,438). 



Spots irregular in shape, 5-I cm. diam., dirty whitish in the 

 center, with the border nearly black. Acervuli minute, numerous, 

 innate, erumpent on both sides of the leaf, l)ut more abundant below, 

 the expelled spores forming little subglobose, pale orange colored 

 suhconfluent heaps. Spores oblong or clavate-oblong or ovate, 8-15 

 X 4-5//. 



This is quite distinct from Gl. Sassafras (Cke), ( Gl. affiue E. & K.), 

 in its much larger spores and the different character of tlie spots. 



