FAMILY ENTEROBACTERIACEAE 



485 



Serratia rutilescens (Hefferan) Bergey 

 et al. (Bacillus rutilescens Hefferan, 

 Cent. f. Bakt., II Abt., 11, 1903, 313; 

 Erythrobacillus rutilescens Holland, Jour. 

 Bact., 5, 1920, 220; Bergey et al.. Man- 

 ual, 1st ed., 1923, 91.) The characters 

 given do not distinguish this species from 

 strains of Serratia marcescens that have 

 nearly lost their power of pigment pro- 

 duction except that it is reported to grow 

 rapidly at 37°C. No authentic cultures 

 appear to be available . From Mississippi 

 River water. 



Serratia rutilis (Hefferan) Bergey et al. 

 (Bacillus rutilis Hefferan, Cent. f. 

 Bakt., II Abt., 11, 1903, 313; Erythro- 



bacillus rutilis Holland, Jour. Bact., 5, 

 1920, 220; Bergey et al., 1st ed., 1923, 94.) 

 The original of this species appears to 

 have been a heavily pigmented strain of 

 Serratia marcescens or of Serratia ply- 

 muthicum. No characters are given that 

 distinguish it from these species and no 

 cultures appear to be available. From 

 Illinois River water. 



Serratia ster cor aria Jan. (Bull. Soc. 

 Sci. de Bretagne, 16, 1939, 34.) From 

 feces. Claimed to be different from 

 Serratia marcescens because it attacks 

 lactose, maltose and mannitol and 

 reduces molybdates even more actively 

 than Serratia gutturis. 



