337] STUDIES ON GREGARINES— WATSON 127 



saw and named were not sporonts but cysts formed by the union of two 

 equal or sub-equal sporonts. None of his other descriptions of spo- 

 ronts applies to the particular species of Orthoptera from which these 

 cysts were taken, so no sporonts, but only cysts, must have been present 

 in the host. Dufour did not, as might have been the case, describe the 

 cysts and sporonts in the same host as separate species. These cysts were 

 taken from Oedipoda coerulescens and from Gryllotalpa sp. 



Neither Frantzius nor Lankester mentioned the 'species' and the 

 host. Labbe mentioned it as a synonym of Hirmocystis gryllotalpae 

 (Leger) Labbe, probably from an identity of host genera and certainly 

 not because of any similarity in appearance. 



GREGARINA SOROE Dufour 



1837 :12 

 1851 :11 

 1863 :94 

 1899 :34 



Just as in the instance above, Dufour has here described cysts in- 

 stead of sporonts. His words are as follows: 



"Subsphericum alba, cephalothorace abdominis dimidiam partem adaequante." 



"Celle-ci n'est peut-etre qu'une variete de la precedente ; mais le cephalotho- 

 race ne forme pas, comme dans cetta derniere, la moite de tout le corps." 



The cyst in question consists of two unequal parts, making the 

 " cephalothora " less than half the sphere. 



Diesing and Lankester mention the form and Labbe places it in his 

 "Uncertain" group under the original name. 



