1892.] NATURAL SCIENCES OF PHILADELPHIA. 157 



Phyllosticta astericola E. & E. 



On leaves of Aster umbellatus, Kenosha Co., Wisconsin. Aug., 

 1892. (Davis, No. 9,212.) 



Spots suborbicular, 1-2 mm. diam., dark brown, margin mostly 

 subrepand and surrounded with a yellowish discoloration, often con- 

 fluent, paler below. Perithecia epiphyllous, prominent, black, 150- 

 200/;. diam. Sporules abundant, almond-shaped, hyaline, mostly 

 2-nucleate, 8-11 x 4//. 



Phyllosticta perforans E. <fc E. 



On leaves of Solanum dulcamara, London, Canada. (Dearness.) 

 Spots arnphigenous, small (2-3 mm.), thin and transparent, round 

 or subangular, with a narrow, yellowish, slightly raised border on 

 both sides. Perithecia mostly epiphyllous, few, sublenticular, black, 

 perforated, 100-120// diam. Sporules elliptical, subolivaceous 

 (smoky-hyaline), 32-51 x 2h J - 



Differs from Ph. dulcamara Sacc, in its thin white, mostly smaller 

 spots and subolivaceous sporules. The spots are sometimes confluent 

 and finally deciduous and are sometimes seen partly enclosed in the 

 larger brown spots of Ph. dulcamarce. 



Phyllosticta nicotiana E. & E. 



On leaves of tobacco, North Carolina. Oct., 1891. (Com. Ger- 

 ald McCarthy.) 



Spots arnphigenous, large (£-H era.), irregular in shape, pale 

 dirty brown, lighter in the center, the margin reddish-zonate. Peri- 

 thecia arnphigenous, numerous, erurapent-superficial, black, depressed- 

 hemispherical, I mm. diam., with a broad papilliform ostiolum. 

 Sporules oblong-elliptical, 3i-5 xH//.. This differs from Ph. tabaci 

 Pass., in its erumpent-superficial perithecia and smaller, different 

 shaped sporules. The species of Ph. tabaci in Sydow's M. marchica 

 (2,375), has spots much like this but less definitely limited, with 

 perithecia less numerous and buried in the leaf so that only their 

 apices are visible, and sporules globose or ovate, 4-6//. in their 

 longer diameter and about 3-4// in the their lesser diam. 



Phyllosticta maculans E. & E. 



On fallen leaves of Populus monilifera, Rockport, Kansas. Aug., 

 1892. (E. Bartholomew, No. 682.) 



Perithecia mostly epiphyllous, erumpent-superficial, black, sub- 

 globose, 50-70// diam., pierced above, collected in groups, 2-3 mm. 

 in diameter, but sometimes the perithecia are scattered between the 



