BIOTIC ASSOCIATIONS OF COCKROACHES — ROTH & WILLIS II7 



Periplaneta australasiae and Supella supellectilmm, Australia (Mac- 

 kerras and Pope, 1948). 



Polyphaga saussitrei, U.S.S.R. (Zmeev in Pavlovskii, 1948). 



* Salmonella typhosa (Zopf ) White 



Natural vectors. — Blatta orientalis, Italy (Antonelli, 1930, 1943). 



Experimental vectors. — Blaberus craniifer, U.S.A. (Wedberg et 

 al., 1949). 



Blatta orientalis, Italy (Spinelli and Reitano, 1932) ; U.S.A. (Mc- 

 Burney and Davis, 1930) ; U.S.S.R. (Rozengolts and ludina in Pav- 

 lovskii, 1948). 



Blattella germanica, U.S.A. (Janssen and Wedberg^ 1952) ; Ger- 

 many (Jettmar, 1927) ; U.S.S.R. (Rozengolts and ludina in Pav- 

 lovskii, 1948). 



Periplaneta americana, Gold Coast Colony (Macfie, 1922) ; Nether- 

 lands (Akkerman, 1933) ; Formosa (Morischita and Tsuchimochi, 

 1926) ; U.S.A. (Olson in Roth and WilHs, 1957a). 



Periplaneta australasiae, Formosa (Morischita and Tsuchimochi, 

 1926). 



Polyphaga saiissurei, U.S.S.R. (Zmeev in Pavlovskii, 1948). 



Cockroaches [presumably Blatta orientalis, Blattella germanica, 

 and/or Periplaneta americana], Egypt (El-Kholy and Gohar, 1945). 



Serratia marcescens Bizio 



Synonymy. — Bacillus prodigiosus. Bacterium prodigiosum. 



Habitat. — Water, soil, milk, foods, and various insects. 



Natural hosts. — Blatta orientalis, Poland (Nicewicz et al., 1946) : 

 From intestinal tract. Italy (Spinelli and Reitano, 1932). 



Blattella germanica, Canada (Heimpel and West, 1959). 



Diploptera punctata, Nauphoeta cinerea, Neostylopyga rhomhifolia, 

 Panchlora nivea, Pycnoscelus surinamensis, and Supella supellectilium, 

 U.S.A. (Roth and Willis, unpublished data, 1958) : The organism 

 vi^as isolated and identified by Dr. Hillel Levinson, Quartermaster 

 bacteriologist, from dead specimens found in our laboratory colonies 

 w^hich showed the red coloration characteristic of insects that have 

 died with infections of 6". marcescens (pi. 16, A, B). 



Leucophaea maderae, U.S.A. (Levinson, personal communication, 

 1958) : The organism was isolated from the hemolymph of living 

 insects while attempting to determine the cause of unexplained mor- 

 tality in our laboratory colony of this insect. 



Leucophaea maderae or Periplaneta americana, Philippine Islands 

 (Barber, 1912) : From hemolymph. 



