ELISHA MITCHELL SCIENTIFIC SOCIETY. 59 



On dead parts of leaves oi Rhyncospora gloinerata^ 2034, 

 Auburn, iVugust 27, 1891, Atkinson. 



53. Cercospora atra margin alis n. sp. Spots am- 

 phigenous, orbicular, 4 — 6 mm. , light brown or dirty grey 

 with black border above. H\'phse hypophyllous, fascicu- 

 late from stroma, short, flexuous or denticulate, continu- 

 ous, faintly fuliginous, 10 — 30 X 4 — 4, 5. Conidia obcla- 

 vate or c}'lindrical, i — 10 - septate, guttulate, yellowish, 10 

 — 70 / 4 — 5. Different from C. Physalidis E. & E., N. 

 A. F. 2299, and from other forms on Sola num. 



On leaves of Solanum nignim (?), 1359, Auburn, 1890, 

 x\tkinson. 



54. Cercospora Trop.Eoli n. sp. Spots amphigenous, 

 very light brown with narrow elevated margin above, sub- 

 orbicular, 2 — 4 mm. Hyphse epiphyllous, few^ in cluster, 

 stout, short, faintly fuliginous, 20 — 40 X 5, dentate. 

 Conidia hyaline, rather stout at base and quickly tapering 

 into long, slender apical portion, reminding one of C. fla- 

 gellaris^ multiseptate, 50 — 150 X 3, 5 — 4, 5 at base. 



On leaves of cultivated Tropceolum, 2 no, Auburn, Sep- 

 tember 7, 1 89 1, Atkinson. 



55. Cercospora tesselata n. sp. Spots indefinite 

 above, usually narrowly oblong, nearly black below with 

 bluish tinge caused by numerous black tufts and bluish 

 cast of leaf tissue affected. Hyphae hypophyllous, densely 

 fasciculate, fuliginous, short, 10 — 12 X 2, 5 — 3, denticu- 

 late, tufts in longitudinal and usually transverse rows, 

 giving a checkered appearance to the group. Conidia 

 slender, hyaline, terete, curved, septate, 50 — 90 X 2 — 2, 5. 



On languid leaves of Ehisine ^gyptica^ 2306, Auburn, 

 November 6, 1891, x^tkinson. 



56. Cercospora seriata n. sp. Spots amphigenous, 

 cinereous with definite brown border margined by indefinite 

 yellow, irregularly oblong, sometimes confluent. Hyphse 

 epiphyllous, fasciculate, faint reddish brown, in age darker. 



