b'. Pigment purple. 91. Streptoryiyces novaecaesareae. b^. Pigment brown to black. c'. Growth on potato gray to brown. 92. Streptomyces exfoliatiis. c^. Growth on potato greenish to black. 93. Streptomyces gelaticus. c'. Aerial mycelium pigmented green. 94. Streptomyces glaucns. a*. No soluble pigment on synthetic agar. b^ Growth dark brown to almost black; aerial mycelium white to gray. c^ Abundant spirals in aerial mycelium, d^. Conidia spherical to ellipsoidal. 95. Streptomyces rutgersensis . d"^. Conidia ellipsoidal to cylindrical. 96. Streptomyces halstedii. c^. No spirals produced on synthetic agar. d^. Spores cylindrical; growth on synthetic agar dark brown. 97. Streptomyces fumosus. d^. Spores ellipsoidal. Growth on synthetic agar light brown. 98. Streptomyces lipmanii. b^. Growth cream-colored to yellow or yellow-orange. 0^ Aerial mycelium on certain media white, moist with dark, glistening patches; spores ellipsoidal. 99. Streptomyces hygroscopiciis. c^. Aerial mycelium white-yellow to brownish yel- low; spores cylindrical. 100. Streptomyces longisporoflavus . c". Aerial mycelium w^hite; spores cylindrical. 101. Streptomyces candidus. c^. Aerial mycelium powdery white with yellow tinge. 102. Streptomyces alboflavus. c*. Growth cream-colored; aerial mj'celium cottony white; pigment in milk and on potato rose to yel- lowish. 103. Streptomyces flocculus. c". Aerial mycelium gray; slight darkening of potato plug. 104. Streptomyces antimycoticus. b^. Growth orange or red. ci. Growth yellowish to orange; aerial mycelium sea- shell-pink. 105. Streptomyces fradiae. c^. Growth rose to red; aerial mycelium white. di. Growth on gelatin j-ellow to red; slow lique- faction. 106. Streptomyces albosporeus. d^. Growth light brown; rapid liquefaction. 107. Streptomyces purpurascens. c^ Growth light rose to purple-red; aerial mycelium
