182 ILLINOIS ACADEMY OF SCIENCE 
Spots amphigenous, centers 3-8 mm. in diameter, ashen-grey 
to black, surrounded by a rose-tinted area, 3-5 mm. broad. 
Perithecia 40-80 » in diameter, numerous, immersed below the 
epidermis and erumpent. Asci numerous, 8-spored, inordinate, 
44-48x14 4. No paraphyses. Spores 1-septate, hyaline, 14x4 u. 
On Clusia rosea. Maricao, 1374 (type), 8829, 8849, Lajas, 
7136, Utuado 4587, Mayaguez, 7482. 
The spots when hypophyllous are different in appearance 
from epiphyllous spots due to difference in stomatal relations. 
When below, nearly every stoma within the diseased area is 
filled by a perithecium, while above the perithecia are necessar- 
ily erumpent. 
Mycosphaerella mucunae sp. nov. 
Spots irregularly circular, dead, 1-2 cm. in diameter, marked 
conspicuously with a series of roughly concentric circles, about 
2mm. apart. Perithecia numerous, black, 78-94 » in diameter, 
Ostiole distinct. Asci 8-spored, 34-40x8-10 ». Spores long 
and narrow, 17-20x3 p, 1-septate, obtuse. 
On Mucuna pruriens, Aftasco, 3535. 
The concentric marking of the spots and the long narrow 
spores are especially characteristic. 
Mycosphaerella maydis (Pass. ) 
On Syntherisma sanguinale, El Alto de la Bandera, 8255. 
The present form agrees sufficiently well with the description 
of this species to enable us to regard them as the same, There 
are several species described on various gramineae of which 
the same might be said. 
Guignardia Viala and Ravaz 
Guignardia heterotrichi sp. nov. 
Spots irregularly circular, 2-5 mm. in diameter, tan colored, 
bordered by a darker line which is about 1 mm. wide, center 
black, due to clusters of perithecia. Leaf tissue of spot killed 
completely. Perithecia clustered in centers of spots, occupying 
the mesophyll, black, 150-200 u» in diameter, ostiole small, 10- 
