j6 frEW YORK STATE MUSEUM 



Microdiplodia spiraeocola Dearness & House, sp. nov. 



Pycnidia in the bark and on the decorticated branchlets, scattered 

 or gregarious or subcespitose, black, .5— .75 mm ; conidia dark brown, 

 septate, on very short basidia or sessile, 9-1 1 x 4-5 fi. 



On dead twigs of O p u 1 a s t e r opulifolius (L.) 

 Kuntze, Rensselaer, H. D. House, November 28, 1916 (Type). 

 On dead twigs of Spiraea latifolia Borkh., Albany, 

 H. D. House, January 10, 1921. 



Mycosphaerella cruris-galli (E. & K.) Lindau 

 On dead leaves of grass, Tridens flava (L.) Hitchc. 

 Wading River, Long Island, Dr C. H. Peck (date of collection 

 not indicated). Originally described from Kansas (Swingle), 

 on Echinochloa Crusgalli (L.) Beauv. 



Mycosphaerella lycopodii (Peck) House 

 On dead stems (Peduncles) of Lycopodium clavatum 

 L. Newcomb, Essex county, //. D. House, July 20, 1921. This is 

 but a few miles from Aiden Lair, the type locality. 



Mycosphaerella oxycocci Dearness & House, sp. nov. 



Perithecia numerous, scattered, hypophyllous, perforate, 90 /i 

 thick. Asci aparaphysate, shaped like a tennis racket, 15-30 x 9-12 ft,, 

 stipes 15-30 x 3-4 ix. Sporidia botuliform, 9-12 x 3-4 //,; septum 

 dividing a narrow third from a wider two-thirds. In the material 

 examined most of the sporidia were continuous or very obscurely 

 septate. 



On dead or languishing leaves of Oxycoccus macro- 

 carpus (L.) Pers. Newcomb, Essex county, H. D. House, 

 July 27. 



Myxosporium Ellisii Saccardo 



On dead twigs of Populus nigra var. i t a 1 i c a DuRoi. 

 Albany, H. D. House, May 13, 1917. 



Pestalozzia monochaetoidea Sacc. & Ellis, var. parasitica 

 Dearness & House, var. nov. 

 On reddish brown areas producing the typical gloeosporial effect, 

 namely, circinately discolored and killed tissue. The conidia are 

 two to six septate, mostly four to five septate, and reach in excep- 

 tionally long examples to 30 /a, otherwise agreeing with typical sap- 

 rophytic material on dead twigs of the same host. 



On living leaves of Opnlaster opulifolius (L.) 

 Kuntze, Albany, H. D. House, August 27, 1919. 



