I06 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I4I 



t Vibrio Types I and II Heiberg 



Habitat. — Water. 



Natural vectors. — Cockroaches, India (Pasricha et al., 1938) : The 

 vibrios were found in 16 or 17 percent of 94 cockroaches and re- 

 sembled Vibrio comma in their morphology and their main biochemical 

 reactions ; however, serum-agglutination reactions differed. 



Vibrio sp. 

 Habitat. — Blatta orientalis, U.S.A. (Leidy, 1853) : From intestine. 



Family RHIZOBIACEAE 

 Chromobacterium violaceum (Schroeter) Bergonzini 



Synonymy. — B. violaceus. 

 Habitat. — Water. 



Experimental vectors. — Cockroach, U.S.A. (Longfellow, 1913) : 

 Recovered from outer part of body and intestinal tract. 



Family MICROCOCCACEAE 



♦Micrococcus aurantiacus (Schroeter) Cohn 



Natural vectors. — Blattella germanica, U.S.A. (Janssen and Wed- 

 berg, 1952). 



* Micrococcus citrous Migula 



Natural vectors. — Cockroaches, U.S.A. (Longfellow, 1913). 

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



* Micrococcus epidermidis (Winslow and Winslow) Hucker 



Natural vectors. — Blattella germanica, U.S.A. (Janssen and Wed- 

 berg, 1952). 



t Micrococcus nigrofaciens Northrup 



Source. — Diseased June beetle larvae. 



Experimental infection. — Periplaneta americana, U.S.A. (North- 

 rup, 1914) : Three of four adults were infected by feeding them 

 bread saturated with a broth culture of the Micrococcus. After 11 

 days the tarsi of the cockroaches became infected, and the hind legs 

 split and broke off. Antennae and setae also were affected and 

 micrococci were recovered from the feces. 



* Micrococcus pyogenes var. albus (Rosenbach) Schroeter 



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

 1949). 



