ether, chloroform and benzol; soluble (Hef- feran, op. cit., 1903, 529). Yellow pigment insoluble. Distinctive character: Milk becomes blood-red in 12 to 20 days. Non-pathogenic for mice (Fuller and Johnson, op. cit., 1899, 609). Optimum temperature, between 28° and 35° C. Aerobic (Fuller and Johnson, loc. cit.). Facultatively anaerobic (Hefferan, op. cit., 1903,530). Source : Isolated from red milk by Hueppe in Wiesbaden in 1886. Isolated from feces of a child by Baginsky (Cent. f. Bakt., 6, 1889, 137). Isolated from Ohio River water by Fuller and Johnson (op. cit., 1899, 609). Iso- lated from Mississippi River water by Hef- feran {op. cit., 1903, 456). Burri and Staub (Landwirtsch. Jahrb. d. Schweiz, 40, 1926, 1006) isolated an organism of this type from Emmenthal cheese; they regarded it as closely related to or possibly identical with this species. Habitat: Probably widely distributed in nature. 3. Brevibacteriiim fulvum (Zimmer- mann, 1890) Breed, 1953. (Bacillus fvlvus Zimmermann, Bakt. unserer Trink- u. Nutzwasser, Chemnitz, 1, 1890, 44; Breed, Riassunti delle Comunicazioni, VI Con- gresso Internaz. di Microbiol., Roma, 1, 1953, 14; also see Atti del VI Congresso Internaz. di Microbiol., Roma, 1, 1955, 14.) ful'vum. L. adj. ftdvus deep yellow. Rods, 0.8 by 0.9 to 1.3 microns, occurring singly and in pairs. Non-motile. Gram-posi- tive. Gelatin colonies: Circular, convex, red- dish yellow. Gelatin stab: Convex, reddish yellow sur- face growth. Good growth in stab. Slow liquefaction. Agar slant: Orange-red, glistening streak. Broth: Turbid with yellow sediment. Litmus lactose broth: Acid, or acid then alkaline (Dyar, Ann. N. Y. Acad. Sci., 8, 1895,368). Potato: Slowly spreading, yellowish, glis- tening growth. Indole produced (Dyar, loc. cit.). Nitrites not produced from nitrates (Bergey) . Aerobic, facultatively anaerobic. Optimum temperature, 30° C. Source: Isolated from Chemnitz and D5beln tap water (Zimmermann). From dust and water (Dyar). Habitat: Water. 4. Brevibacteriuin insectiphiliiim (Steinhaus, 1941) Breed, 1953. (Bacterium insectiphilium Steinhaus, Jour. Bact., 4^, 1941, 777; Breed, Riassunti delle Comunica- zioni, VI Congresso Internaz. di Microbiol., Roma, 1, 1953, 13; also see Atti del VI Congresso Internaz. di Microbiol., Roma, 1, 1955, 13.) in.sec.ti.phi'li.um. L. noun insectum an insect; Gr. adj. philius friendly; M.L. in- sectiphilium friendly to insects. Rods, 0.8 to 1.2 by 1.0 to 2.8 microns, occurring singly. At times appearing almost as cocci or coccobacilli. Non-motile. Gram- positive. Gelatin stab: Liquefaction. Agar colonies: Light greenish 5^ellow, cir- cular, entire, raised, glistening, smooth, opaque. Agar slant: Filiform, raised, smooth, glistening, opaque growth. Broth: Moderate turbidity; slight, viscid sediment. Litmus milk: Alkaline, peptonization and slow reduction. Potato: Greenish yellow, thick, moist growth. Indole not produced. Hydrogen sulfide not produced. No acid from glucose, lactose, sucrose, maltose, fructose, mannitol, galactose, arabinose, xylose, dextrin, salicin, rham- nose, raffinose, trehalose, sorbitol, inulin, dulcitol, gljj^cerol, adonitol or mannose. Starch slightly hydrolyzed. Nitrites not produced from nitrates. Aerobic. Source : Isolated from the body wall of the bagworm, Thyridopteryx ephemeraeformis Haw. Habitat: Unknown. 5. Brevibacteriuin brunneuni (Cope- land, 1899) Breed, comb. nov. (Bacillus
