44 



PEOTOZOA 



Fig. 61 



Gregarina 



achetae- 



abbreviatae 



(Crawley). 



Key to the genera of Gregarinidae here described : 



Oj Individuals usually associated 1. GREGABINA 



o 2 Individuals usually solitary 2. STENOPHOBA 



1. GREGARINA Dufour. Individuals usually associated; epimerite 

 simple and small but varying in form, being conical or spherical; cysts 



spherical or ovoid, when ripe with long projections called 

 sporoducts through which the spores emerge: about 20 

 species; in the digestive tract of insects. 



G. blattarum von Siebold (Fig. 60). Body elongate 

 but somewhat irregular; cyst ovoid with long sporo- 

 ducts; length about .5 mm.: in the intestine of the 

 cockroach. 



G. achetae-abbreviatae Leidy (Fig. 61). Deutomerite 

 ellipsoidal or oval; protomerite hemispherical; animals 

 solitary or in pairs; length .5 mm.: in the common 

 cricket. 



G. melanopli Crawley. Protomerite cubical or flat- 

 tened; deutomerite more or less rectangular; length .37 

 mm.: in intestine of the grasshopper. 



G. locustae-carolinae Leidy. Protomerite globular on 

 which the epimerite appears as a small round knob ; 

 deutomerite globular; length .35 mm.: in intestine of the 

 large grasshopper, Dissosteira Carolina. 



2. STENOPHORA Labbe. Body large, ovoid or elongate ; 

 cyst without sporoducts ; protomerite small : 4 species. 



S. juli Frantzius (Fig. 62). With the characters of the genus; 

 protomerite often conical: very common in the intestine of Julus. 



Fig. 62 



Stenophora 



juli 

 (Crawley). 



FAMILY 2. DACTYLOPHOBIDAE. 



Epimerite asymmetrical and irregular, with digitiform processes: 

 5 genera. 



1. ECHINOMERA Labbe (EchinocepTialus Schnei- 

 der). Body ovoid and massive; epimerite conical 

 with the apex excentric and varied in form: 

 1 species. 



E. hispida (Schneider) (Fig. 63). Deutomerite 

 eight or ten times as long as the other two divi- 

 sions; animal very active: common in gut of 

 Lithobius. 



2. TRICHORHYNCHUS Schneider. Protomerite cylindrical or trun- 

 cated with a long rostrum : 1 species. 



Fig. 63 Fig. 64 



Fig. 63 EcU- 

 nomera hispida (from 

 Bronn). Fig. 04 

 Amphoroides fonta- 

 riae (Crawley). 



