48 JOURNAL OF THE 



ous, torulose, or denticulate 30 — 150 X 3 — 4. Conidia 

 nearly cylindrical to very narrowly tereti-fusoid, or obcla- 

 vate, and curved, 3 — 5 — multiseptate, faintly olive— fus- 

 cidulous, 25 — 120 X 3 — 4. 



On leaves of Rhus copallina^ 1178, Auburn, June 30, 

 1890, R. toxicodendron, 1181, June 30, 1890; R. venenata, 

 1304, Sliorter's Station, July 16, 1890; Rhus sp. unde- 

 termined, 1565, Auburn, August 6, 1890, Atkinson; Rhus 

 <rlahra, 2014, Auburn, August 7, 1891, Duggar and New- 

 man. On R. toxicodendron both the hyphse and conidia 

 are more slender than on the other species, and the conidia 

 longer, many times more septate and very frequently gut- 

 tulate. The variations, however, considering other very 

 striking resemblances, do not seem sufficient to separate it. 



22. Cercospora canescens E. & M. Amphigenous, in 

 large dead areas, or spots 2 — 6 ?;?;;/., brown or dirty grey 

 with narrow dark border above. Hyphge amphigenous, 

 fasciculate, brown, septate, nearly cylindrical, stout, 50 — 

 100 X 5. Conidia hyaline, obclavate, 3 — 8 — septate, 

 nearly straight, 30—120 X 4, 5—5, 5. 



On leaves of cultivated bean {Phaseolus vulgaris), 1983, 

 Auburn, July 25, 1891, Newman. 



23. Cercospora avicularis Wint, var. sagittati n. van? 

 Spots amphigenous, light brown with narrow elevated 

 margin frequently bordered by reddish brown, 2 — 3 mj?i., 

 Hyphie olive brown, frequently with reddish tinge, fas- 

 ciculate, septate, sometimes subgeniculate to denticulate, 

 70 — 170 X 4. Conidia faintly colored, septate, too— 300 



X 3, 5- 

 On leaves of Polygonum sagittatuni, 2201, Auburn, 



October i, 1891, Duggar. 



24. Cercospora Liquidambaris C. & E. Spots am- 

 phigenous, dirty white above, brown below, small, numer- 

 ous, irregular with a blistered appearance. Hypha? fas- 

 ciculate from tuberculate base, dark reddish brown, short. 



