77] STUDIES ON GREGARINES—KAMM 77 



This parasite is one-fifth the length of its host, and because of the 

 transparency of the host can easily be seen from without when both are 

 alive. 



No clue to the actual identity of this parasite exists in the earlier work 

 except this by Diesing (1851): 



Proboscis brevissime cylindrica apice subglobosa truncata crenata, uncinis retractus? 

 which seems to apply to the epimerite. It seems strange, if this species is 

 meant, tliat no one mentions the absence of a septum until Leger described 

 anew the species with a new name. He does not refer to the earlier workers. 



Labbe, however, unites the species under the older name. The hosts 

 are identical. 



SCHNEIDERIA MUCRONATA Leger Type species 

 [Figures 1, 2 and 3] 



1892 Schneideria mucronata Leger 1892: 153 



1899 Schneideria mucronata Labbe 1899: 22 



1903 Schneideria mucronata Minchin 1903: 199, 333 



Sporonts solitary, elongate. Length 700-800/x. Width not given. 

 Ratio LP:TL: :1:7; WP:WD: :1:1. Protomerite irregularly triangular, 

 pointed, widest two-thirds its length from the apex. Deep constriction 

 between protomerite and deutomerite. No septum. Deutomerite slender, 

 gradually tapering from anterior end to a long slender point. Epimerite 

 a wide flattened disc with a milled border and a short style in the center. 

 Nucleus large, spherical, one karyosome. Very agile in movement, also 

 polymorphic. 



Cysts 270 by 190/i, fusiform spores 15 by 9/x. 



Intestinal caeca of Bibio marci (L.), larva. 



Taken in Tourraine and Poitou, France. 



SCHNEIDERIA sp. Leger 

 1899 Schneideria sp. Leger 1899: 526, 532 



1903 Schneideria sp. Minchin 1903:333 



Very briefly described as unilocular, less than 250/i in length, greatly 

 dilated in the anterior portion and gradually tapering posteriorly. Epi- 

 merite not seen. Judging by context from similar parasites in other 

 fly larvae, the author considers it a Polycystid rather than a Monocystid, 

 which it resembles. 



Host: Chironomus sp., larva. 



Taken in Poitou, France 



Genus STYLOCYSTIS Leger 1899: 529 

 Dicystid gregarine with a simple epimerite in form of a sharply pointed 

 recurved spine. Spores biconical. 



