44 



PROTOZOA 



Key to the genera of Gregarinidae here described: 



ffi Individuals usually associated 1. Gregarina 



On Individuals usually solitary 2. Stenopiiora 



1. Gregarina Dufoiir. 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 



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



Fig. Gl 



Gregarina 



achetac- 



ahhrerialae 



(Crawley). 



or 



solitary 

 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 

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



stenophora 



juli 

 (Crawley). 



genus ; 



Family 2. DACTYLOPHOEIDAE. 



Epimerite asymmetrical and irregular, with digitiform processes: 

 5 genera. 



1. EcHlNOMERA Labbe (Echinocephahis 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 

 Lithohkis. 

 2. Trichorhynchus Schneider. Protomerite cylindrical or trun- 

 cated with a long rostrum: 1 species. 



Fig. G4 



Fig. 0.3 — Echi- 

 nnmera hispida (from 

 Bronn). Fig. 04— 

 Amphoroiden fonta- 

 riae (Crawley). 



