1895.] NATURAL SCIENCES OF PHILADELPHIA. 423 



Leptosphaeria lethalis E. & E. 



On dead stems of Pentstemon confertus. Latah Co., Idaho, July, 

 1894. Prof. C. V. Piper, No. 330. 



Perithecia erumpent- superficial, gregarious, subglobose, l-l rum. 

 diam., with a papilliform ostiolum. Asci clavate-cylindrical, 50-60 

 x 7-8 //, with abuudaut paraphyses, 8-spored. Sporidia fusoid, 

 slightly curved, 3-septate not constricted, unless slightly so at the 

 middle septum, 50-60 x 3£-4 p. 



The perithecia appear on the living stems which are soon black- 

 ened and killed. 



Leptosphaeria concinna E. & E. 



On dead stems of Castilleia miniata Doug. Mt. Richtophen, N. 

 W. Colo., July, 1894. C. F. Baker, No. 271, partly. 



Perithecia scattered, subcuticular, subglobose, 200-300 (i diam., 

 at length semiemergent, but still more or less covered by the black- 

 ened cuticle; ostiolum papilliform. Asci clavate-cylindrical, 70-80 

 x 7-10 fi, paraphysate, short-stipitate. Sporidia biseriate above, 

 fusoid, pale-yellow, 5-septate, slightly curved, one or two of the 

 middle cells slightly swollen, 20-27 x 3-4 //. 



L. Ogilviensis R. Br., has the asci and sporidia larger; in L. 

 tenera Ell., they are smaller, and in L. agnita the sporidia are 6- 

 7- septate and larger. 



Metasphaeria quercina E. & E. 



On dead twigs of Quercus coccinea, var. tindoria. Newfield, N. J. , 

 June, 1895. 



Perithecia gregarious, buried, globose, 250-300 />. diam. , raising 

 the blackened epidermis into pustules pierced at the apex by the 

 papilliform ostiolum. Asci cylindrical, short-stipitate, 170-190 x 

 12 <>.. Paraphyses filiform, shorter than the asci. Sporidia uniseri- 

 ate, oblong, 3-septate, and constricted at the septa, hyaline, 20 x 7- 



9 i±. 



Differs from M. Fiedleri (Niessl), in its cylindrical asci and cyl- 

 indrical-oblong, not fusoid, straight sporidia. 



Ophiobolus Helianthi E. & E. 



On dead stems of Hellanthus Maximiliani. Rockport, Kansas, 

 March, 1895. Bartholomew, No. 1,681. 



Perithecia scattered, erumpent-superficial, ovate-globose, about | 

 mm. diam. Asci clavate-cylindrical, p. sp. 40x7-8/7, paraphysate, 



