132 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I4I 



Family DEMATIACEAE 



Memnoniella echinata (Rivolta) Galloway 



Natural host. — Ootheca of Blattella germanica, U.S.A., Pennsyl- 

 vania (Roth and Willis, unpublished data, 1952) : On material that 

 had oozed from a damaged ootheca. Determination by Miss Mary 

 Downing. 



Torula acidophila Owen and Mobley 



Natural host. — Periplaneta americana, U.S.A. (Owen and Mobley, 



1948) : The digestive tract of this cockroach is the normal habitat of 

 this yeast which was transmitted to sirup by the insects. The yeast 

 superimposed a foreign taste, suggestive of malic acid, upon the 

 original flavor of the sirup. 



Torula gropengiesseri Lodder 



Natural host. — Blatta orientalis, Germany (Gropengiesser, 1925 ; 

 Lodder, 1934) : Isolated from fat body and oothecae. Gier (1947) 

 is of the opinion that the so-called yeasts that supposedly may displace 

 the bacteroids in the fat body (Mercier, 1907b; Gropengiesser, 

 1925) may actually represent poorly fixed and insufficiently stained 

 bacteroids. 



Torula rosea Preuss 



Experimental host. — Blaherus craniifer, U.S.A. (Wedberg et al., 



1949) : Upon repeated feeding of massive doses of this yeast to the 

 cockroach, these workers were able to isolate the organism from the 

 feces up to six days thereafter. There was no evidence that T. rosea 

 was pathogenic for B. craniifer. 



Class PHYCOMYCETES 



Order MUCORALES 



Family MUCORACEAE 



Mucor guilliermondii Nadson and Filippov 



Natural host. — Periplaneta americana, U.S.S.R. (Nadson and 

 Filippov, 1925 ; Filippov, 1926) : Isolated and cultured from intestine. 



Mucor sp. 



Natural host. — Ootheca of Periplaneta americana, U.S.A., Pennsyl- 

 vania (Roth and Willis, unpublished data, 1952) : Inside ootheca. 

 Determination by Miss Mary Downing. 



Pycnoscelus surinamensis, Germany (Bode, 1936) : Isolated from 

 fat body which it had stained red. 



