BIOTIC ASSOCIATIONS OF COCKROACHES — ROTH & WILLIS 201 



wood, 1932] ; Thelastoma hulhoesi (Magalhaes, 1900) Travassos, 

 1929; although this last combination (from Chitwood, 1932) is not 

 given by Basir (1956), it is implied by the synonymy that he does cite 

 under T. pachyjuli. 



Natural hosts. — Blatta orientalis, Czechoslovakia (Groschaft, 1956). 



Periplaneta americana, Brazil (Magalhaes, 1900) ; North America 

 (Chitwood, 1932); U.S.A., North Carolina (Hatcher, 1939). 



Thelastoma palmettum Chitwood and Chitwood, 1934 



Natural host. — Panesthia angustipennis, Philippine Islands (Chit- 

 wood and Chitwood, 1934). 



Thelastoma riveroi Chitwood, 1932 

 Natural host. — Periplaneta sp., Cuba (Chitwood, 1932). 



Undetermined nematodes 



Natural host. — Cutilia sp. near sedilloti, U.S.A. (hosts imported 

 from New Zealand) (Roth, unpublished data, 1957). 



Class NEMATOMORPHA 

 Order GORDIOIDEA 



The immature stages of the following gordian worms have been 

 found in the body cavity of cockroaches. 



Family CHORDODIDAE 

 Chordodes morgan! Montgomery, 1898 



Synonymy. — Chordotes [sic] puerilis Montgomery, 1898 [Ward, 

 1918]. 



Natural host. — Cockroach, U.S.A. (Montgomery, 1898) ; Pennsyl- 

 vania, Maryland, Michigan, Ohio, Florida, Iowa, Nebraska (Ward, 

 1918). 



Family GORDIIDAE 



Gordius aquaticus Linnaeus, 1758 



Natural host. — Blatta sp., U.S.A. (Stiles and Hassall, 1894). 

 Leidy (1879) identified a 9-inch-long nematode which came from 

 a cockroach {Blatta orientalis?) as probably being Gordius aquaticus. 



