307] STUDIES ON GREG ARINES WATSON 97 



til the cephalonts of the former or the sporonts of the latter or both will 

 have been described, the two species must remain separate. 



The only other parasite described from a host belonging to the sub- 

 family Oedipodinae (Acrididae) is Gregarina locustae Lankester, but 

 the sporonts of the two species are not identical. 



The second host named is now known as Nemobius sylvestris (F.). 



GREGARINA HYALOCEPHALA Dufour 



[Figures 181, 182] 



1837 Gregarina hyalocephala Dufour 1837 :13 



1851 Gregarina hyalocephala Diesing 1851:11 



1863 Gregarina hyalocephala Lankester 1863 :94 



1899 Gregarina hyalocephala Labbe 1899 :34 



Dufour's description is as follows: 



"Oblongo-conica ; cephalothorace hemispherico diaphano, abdominis quartam 

 partem subadaequante . Hab. in ventriculo Tridactyli." 



The species is, from this description, and from the character of the 

 epimerite (Figure 182) quite evidently a member of the genus Grega- 

 rina. 



Frantzius does not mention the species; Diesing and Lankester 

 merely do so and Labbe places it among his Uncertain Species. 



GREGARINA OVATA Dufour 



[Figure 183] 



1826 Gregarina ovata Dufour 1826 :18 



1837 Gregarina ovata Dufour 1837 :12 



1837 Gregarina ovata Siebold 1837 :408 



1838 Clepsidrina conoidea Hammerschmidt 1838 :356 

 1845 Gregarina ovata Desmarest 1845 : ? 

 1848 Gregarina ovata Frantzius 1845 :95 

 1851 Gregarina ovata Diesing 1851 :10 

 1863 Gregarina ovata Lankester 1863 :94 

 1873 Clepsidrina ovata Schneider 1873 :515-33 

 1885 Clepsidrina ovata Schneider 1875 :578-9 

 1875 Clepsidrina ovata Schneider 1885 : ? 

 1899 Gregarina ovata Labbe 1899 :10 



1904 Gregarina ovata Paehler 1904:14-18 



1905 Clepsidrina ovata Schnitzler 1905 :309 



Gregarina: Sporonts biassociative. Measurements not given in 

 any description. Ratio length protomerite : :total length primite :: 



