BIOTIC ASSOCIATIONS OF COCKROACHES — ROTH & WILLIS I25 



Order SPIROCHAETALES 



Family SPIROCHAETACEAE 



fSpirochaeta blattae Tejera 



Habitat. — Blahcrus atropos, Venezuela (Tejera, 1926) : Isolated 

 from intestinal tract. 



* t Spirochaeta periplanetae Laveran and Franchini 



Habitat. — Blatta orientaHs, France (Laveran and Franchini, 

 1920a). 



Cockroaches, Venezuela (Tejera, 1926) : Tejera reported finding 

 "Spirochaeta blatarum Laveran et Franchini" which may have been a 

 lapsus. 



Family TREPONEMATACEAE 



t Treponema parvum Dobell 



Habitat. — Blatta orientalis, England (Dobell, 1912) ; U.S.S.R. ? 

 Zasukhin (1930) : From intestinal tract. 



t Treponema stylopygae Dobell 



Synonymy. — Spirochaeta stylopygae Zuelzer. 



Habitat. — Blatta orientalis, England (Dobell, 1912) ; U.S.S.R.? 

 Zasukhin (1930) : From intestinal tract. 



Unidentified spirochaetes 



Habitat. — Blatta orientalis, U.S.S.R. (Yakimov and Miller, 1922) : 

 Spirochaetes and spirilla were found in the intestines of 70 percent of 

 124 specimens collected in Petrograd. 



Periplaneta amcricana, Gold Coast Colony (Macfie, 1922). 



ADDITIONAL BACTERIA WHOSE TAXONOMIC POSITION IS 



UNKNOWN 



*"B. aerobio del pseudoedema maligno" of Cao 



Natural vectors. — Blatta orientalis, Italy (Cao, 1906). 



B. alcaligenes beckeri 



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

 Isolated from intestinal tract. 



*"B. del pseudoedema maligno" of Cao 



Natural vectors. — Blatta orientalis, Italy (Cao, 1906). 



