BIOTIC ASSOCIATIONS OF COCKROACHES — ROTH & WILLIS IO5 



* Pseudomonas eisenbergii Migula 



Natural and experimental vectors. — Blatta orientalis, Italy (Cao, 

 1906). 



* Pseudomonas fluorescens Migula 



Natural and experimental vectors. — Blatta orientalis, Italy (Cao, 

 1898, 1906; Spinelli and Reitano, 1932). 



Periplaneta americana, U.S.A. (Gier, 1947) : The organism was 

 pathogenic to the cockroach when injected. 



t Spirillum periplaneticum Kunstler and Gineste 



Habitat. — Periplaneta americana, France? (Kunstler and Gineste, 

 1906) : From intestinal tract. 



t Spirillum a, /3, and 7 Dobell 



Habitat. — Blatta orientalis, England (Dobell, 191 1, 1912) : From 

 hind gut. 



Spirillum sp. 



Habitat. — Blatta orientalis, U.S.S.R. (Zasukhin, 1930) : From 

 intestinal tract. 



Cockroaches, Venezuela (Tejera, 1926) : From digestive tract. 



♦Vibrio comma (Schroeter) Winslow et al. 



Experimental vectors. — Blatta orientalis, Italy (Cao, 1898; SpinelH 

 and Reitano, 1932). 



Blattella germanica. Orient (Toda, 1923) ; Germany (Jettmar, 

 1927). 



Periplaneta americana, Philippine Islands (Barber, 1914) ; Nether- 

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

 1926). 



Periplaneta australasiae, Formosa (Morischita and Tsuchimochi, 

 1926). 



* Vibrio metschnikovii Gamaleia 

 Experimental vectors. — Blatta orientalis, Italy (Cao, 1898, 1906). 



Vibrio tyrogenus (Fliigge) Holland 



Synonymy. — Vibrio of Deneke. 



Experimental vectors. — Blatta orientalis, Italy (Cao, 1898) : The 

 organism passed through the intestinal tract unchanged. 



