DISEASES TRANSMITTED BY THE COCKROACH 389 



Metazoa 



Platyhelmia: Cestoidea: Hymenolepididae 



Davainea madagascariensis (Davaine) is a tapeworm of man of which 

 the life history is unknown but Castellani and Chalmers suggest that 

 the cysticercus may be found in the cockroaches Blatta orientalis and 

 Periplaneta americdna. 



Ntmathelminthes : Acanthocephala: Gigantorhynchidae 



Monilifortms moniliformis (Bremser), a parasite of rodents and 

 occasionally of man, may pass its larval stage in Periplaneta americama, 

 according to De Magalhaes. 



Nemathelminthes : Nematoda : Spiruridae 



A larval nematode, evidently one of the Spiruridae, is described from 

 the visceral cavity of Periplaneta americana by De Magalhaes. 



Gongylonema pulchrumi Molin is a parasite of the hog. Ransom and 

 Hall report feeding eggs of a Gongylonema of the hog, presumably 

 of this species, to Croton bugs, Blattella germanica, and finding that the 

 eggs hatched and developed to encysted larvae. 



Gongylonema neoplasticum (Fibiger and Ditlevson), a human para- 

 sitic worm which produces cancer-like tumors in the stomach of the rat, 

 passes its intermediate stages in Blattella germanica and Blatta orientalis. 

 It develops as far as an encapsuled larva in the cockroach, according to 

 Fibiger and Ditlevson. 



GongylonemM scwtatumi (Miiller), a very common parasite of cattle, 

 can pass its first stages in the cockroach Blattella germanica, under 

 experimental conditions, according to Ransom and Hall. 



Spirura gastrophila (Miiller), a parasite in the alimentary canal of 

 the hedgehog, has been found by Seurat in the fourth stage encapsuled 

 in the general cavity of Blatta orientalis. 



Nemathelminthes : Nematoda :' Oxyuridae 



Oxyuris hlattceorientalis Hammerschmidt is found- in the cockroachas 

 Blatta orientalis and Periplaneta americana according to De Magal- 

 haes. 



Oxyuris bvihoesi De Magalhaes is also found in the intestine of 

 Periplaneta americana according to De Magalhaes. 



Oxyuris diesingi Hammerschmidt is found, according to De Magal- 

 haes in Blatta orientalis and Periplaneta americana. 



