1918] STEVENS—MELIOLA PARASITES 249 
Fic. 5.—A. caudatum, showing coremia; /.p. 
Fic. 6.—A. caudatum, showing 2 kinds of mycelium and spores; 7745. 
Fic. 7.—A. caudatum, showing coremia; 468, /.p. 
Helminthosporium 
. 8.—H. glabroides on Meliola polytricha: conidia; 1256, Kew Botanical 
Vas h.p. 
PLATE VI 
Fic. 9.—H. glabroides: typical long and short spores; 90309, 4.p. 
Fic. 10.—H. glabroides on M. longipoda: conidia on conidiophores, show- 
ing that truncate end is basal; 7965, 4.p. 
1G. 11.—H. melastomacearum on M. melastomacearum: conidia and co- 
nidiophores; 7380, /.p. 
12.—H. parathesicolum on M. parathesicola: spores; 8192, h.p. 
Fic. 13.—H. philodendri on M. philodendri: spores; 4346, h.p 
Fic. 14.—H. helleri on M. helleri: spores and a conidiophore showing its 
mycelium; 8268, h.p. 
1G. 15.—H. helleri on M. guignardia: spore; 3635, h.p. 
Fic. 16.—H. guareicolum on M. guareicola: 8166, h.p., showing toruloid 
conidiophores. 
Isthmospora 
Fic. 17.—I. spinosa: spores; 3120, h.p. 
Fic. 18.—I. glabra: spores; 9470, h.p. 
