930 MANUAL OP DETERMINATIVE BACTERIOLOGY 



3. Pigmeut at first green becoming brown; aerial mycelium usually 



absent. 



3. Slreptomyces verne. 



4. Pigment yellowish-green; growth on sjmthetic agar penetrating into 



medium, pink. 



4. Streptomyces calif ornicus. 



5. Pigment golden-yellow; growth on synthetic agar yellow, with yellow 



soluble pigment. 



5. Streptomyces flaveolus. 



6. Pigment brown (only on certain protein media, as gelatin, glucose 



broth). 



a. Grown on synthetic agar red to pink. Scant, white aerial 

 mycelium. 



6. Streptomyces bobiliae. 



aa. Growth on sj^nthetic agar colorless; aerial mycelium thin, 

 rose-colored. 



7. Streptomyces roseochromogenus. 



aaa. Growth on synthetic agar mouse-gray ; powdery aerial myce- 

 lium. 



8. Streptomyces griseolus. 



aaaa. Growth on synthetic agar white turning yellowish, aerial 

 mycelium white. 



9. Streptomyces eryihreus. 



B. Soluble yellow pigment on Ca-malate agar. 



1. Proteolytic action strong in milk and gelatin. 



a. Yellow pigment formed. 



b. Cellulose decomposed; starch is hydrolyzed. 



10. Streptomyces cellulosae. 

 bb. Cellulose not decomposed. 



11. Streptomyces parvus. 



2. Proteolytic action weak. 



12. Streptomyces malenconi. 



C. Soluble brown pigment formed on synthetic agar. 



1. Yellowish-green pigment on potato. 



13. Streptomyces diastaticus. 



2. Red-brown pigment on potato plug. 



14. Streptomyces fimicarius. 



D. Greenish-yellow soluble pigment formed; sulfur-yellow pigment on potato. 



15. Streptomyces flavovirens. 



E. Soluble brown pigment formed in all media containing organic substances. 



1. Pigment deep brown (chromogenic type). 



a. Pigment faint brown on organic media, becoming greenish- 

 brown to black; reddish aerial mycelium on glucose agar. 



16. Streptomyces olivochromogenus . 



aa. Aerial mycelium yellowish with gray margin; weak diastatic 

 action. 



17. Streptomyces diastatochromogenes. 

 aaa. Aerial mycelium yellowish; diastatic action weak. 



18. Streptomyces flavochromogenes. 



aaaa. Aerial mycelium gray ; sporophores in clusters; strongly anti- 

 biotic. 



19. Streptomyces antibioticus . 



