104 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I4I 



20 days after the cockroaches had fed once on the virus. The virus 

 was also isolated from the cockroaches' feces and rarely from the 

 fat bodies and reproductive organs. Fischer and Syverton concluded 

 that it is possible that cockroaches could acquire the virus, by feeding 

 on mammalian excreta, maintain it for a period of time, and transmit 

 it by contamination of food. The virus could also be transmitted 

 through the feces of wild mice if the mice happened to feed on virus- 

 infected cockroaches. 



* Mouse encephalomyelitis virus 

 Experimental vectors. — Periplaneta anicricana, U.S.A. (Syverton 

 and Fischer, 1950). 



* Yellow-fever virus 



Experimental vectors. — Blattclla germanica, Great Britain? (Find- 

 lay and MacCallum, 1939). 



VII. BACTERIA ASSOCIATED WITH COCKROACHES 



Classification of the bacteria follows Breed et al. (1948). Synonymy 

 in most cases was taken from the same source. Names of bacteria 

 preceded by the symbol f are either not listed by Breed et al. or are 

 stated by them to be insufficiently characterized for definite classifica- 

 tion. Use of asterisk is explained in footnote 3, page 4. 



Phylum SCHIZOPHYTA 



Class SCHIZOMYCETES 



Order EUBACTERIALES 



Family PSEUDOMONADACEAE 



* Pseudomonas aeruginosa (Scliroeter) Migula 



Natural vectors. — Blab ems craniifer, U.S.A. (Wedberg et al., 

 1949). 



Blatta orientalis, U.S.A. (Olson and Rueger, 1950). 



Blattella germanica, U.S.A. (Olson and Rueger, 1950; Janssen 

 and Wedberg, 1952). 



Periplaneta americana, U.S.A. (Bitter and Williams, 1949, 1949a; 

 Olson and Rueger, 1950). 



Experimental vectors. — Blattella germanica, U.S.A. (Herms and 

 Nelson, 1913). 



Cockroaches, U.S.A. (Longfellow, 1913). 



