l66 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I4I 



Blattella vaga may occasionally damage seedlings in the laboratory 

 (Flock, 1941a), but no damage has been reported in the field (Ball 

 et al., 1942), Heer (1864) reported receiving a shipment of cycads 

 from Cuba with all stages of Periplaneta americana living in holes in 

 the branches, apparently subsisting on the starchy tissues. Golden- 

 berg (1877) stated that sago trees provide cockroaches with their 

 favorite nourishment. Scudder (1879) found Eurycotis floridana 

 living in the tops of the cabbage palmetto, on which he presumed it 

 fed. Parcoblatta americana has been observed feeding on an apple 6 

 feet above ground (Fulton, 1930). 



X. PROTOZOA ASSOCIATED WITH COCKROACHES 



The classification of the Protozoa follows that of Kudo (1954). 

 The use of the asterisk (*) is explained in footnote 3, page 4. 



Phylum PROTOZOA 



Class MASTIGOPHORA 



Order EUGLENOIDINA 



Family EUGLENIDAE 



Euglena sp. 



Experimental host. — Periplaneta americana, U.S.A. (Hegner, 

 1929) : When fed to the insects in concentrated culture, Euglena 

 could withstand conditions in the crop up to 5 hours and were passed 

 into the stomach in a viable state up to 6 hours. However, the ma- 

 jority were killed in the crop within 2 hours and very few reached the 

 stomach alive. 



Order PROTOMONADINA 

 Family OIKOMONADIDAE 

 Oikomonas blattarum Tejera 

 Natural host. — Cockroach, Venezuela (Tejera, 1926). 



Oikomonas sp. 



Natural host. — Blatta orientalis, U.S.S.R. (Yakimov and Miller, 

 1922) : Oikomonas sp. and Monas sp. were found in the intestines of 

 83 percent of 124 cockroaches. 



Cockroach, Venezuela (Tejera, 1926). 



