BIOTIC ASSOCIATIONS OF COCKROACHES — ROTH & WILLIS l8l 



Undetermined species of Amoeba 



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

 der, 1937) : Found in only one specimen. 



Class SPOROZOA 



Order GREGARINIDA 



Family DIPLOCYSTIDAE 



Diplocystis schneideri Kunstler 



(Fig. 2, I) 



Natural hosts. — Blatta orientalis, England (Woodcock, 1904; 



Jameson, 1920). 



Periplaneta americana, France (Kunstler, 1884, 1887) ; England 

 (Jameson, 1920) ; Germany (Foerster, 1939). 



In body cavity of host. Cysts containing spores are ingested during 

 cannibalistic feeding on infected cockroaches. Sporozoites penetrate 

 the gut wall which later ruptures, freeing the gregarines into the 

 coelom. There is no apparent pathogenic effect. Jameson (1920) 

 found 81 percent of P. americana infested with D. schneideri. 



Diplocystis sp. 



Natural host. — Periplaneta americana, U.S.A. (Hertig, 1921): 

 Heavy infections in body cavity. 



Cockroach, India (Ray and Dasgupta, 1955) : A large number of 

 cockroaches, both adults and nymphs, collected in Calcutta were all 

 infected. 



Diplocystis sp. ? 



Natural host. — Blaherus craniifer, U.S.A. (Nutting, 1953) : From 

 I to 12 or more paired trophozoites or cysts may be found in the he- 

 mocoele and occasionally in the thorax. 



Family STENOPHORIDAE 



Stenophora sp. 



Natural host. — Blatta orientalis, India (Bal and Rai, 1955) : Or- 

 ganism found in the midgut of the cockroach. 



Family GREGARINIDAE 



Gregarina blattarum von Siebold 



Synonymy. — Gregarina hlattae orientalis; Clepsidrina blattarum. 

 Natural hosts. — Blatta orientalis, Germany (Siebold, 1837, 1839; 



