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

Cockroaches, Venezuela (Tejera, 1926).

Family PARVOBACTERIACEAE

Bacteroides uncatus Eggerth and Gagnon

Habitat.—Probably intestinal canal of mammals; from human feces.

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

* Brucella abortus (Schmidt and Weis) Meyer and Shaw

Experimental vectors.—Periplaneta americana, U.S.A. (Ruhland and Huddleson, 1941).

Fusiformis lophomonadis Grassé

Habitat.—Surface of a flagellate (Lophomonas striata) which lives in the intestine of cockroaches (Breed et al., 1948; Grassé 1926, 1926a).