192 



THE SPOROZOA 



pattern of Monocystia. Genus 2. Ophryocystis, A. Schneider, 1884. Several 

 species are known, all from the Malpighian tubules of beetles ; type- 

 species 0. btitschlii, A. Schn., from Blaps mortisaga (Fig. 31). The body 

 of the trophozoite is of irregular form, with pseudopodium-like processes 

 (Figg. 21, 31, and 35). The trophozoites of the first generation have 

 several nuclei (apparently not more than six or eight) when full-sized, 

 and then divide up to form as many small individuals of the second 

 generation, which often remain connected together for some time (Fig. 





Fio. 85. 



Stages in the life-history of Ophryocystis francisci, A. Schn. (par. Akis spp.). o, rosette of 

 six small uninucleate individuals produced by division of a schizont ; b and c, individuals 

 detached from a rosette, in 6 still showing the process of attachment ; d, rosette of four indi- 

 viduals ; e, sporont ; /, association of two sporonts ; g, cyst with single spore and two masses 

 of residual protoplasm. (From Wasielewski, after A. Schneider.) 



35, a, d), but ultimately separate and become the uninucleate trophozoites 

 of the second generation. The latter, when adult, associate and become 

 encysted, and then give rise to a single octozoic spore, after elimination of 

 nuclei and conjugation of a surviving pair, as described above (p. 188). 



SUB-ORDER II. EUGREGARINAE, L6ger. Gregarinida in which schizogonic 

 reproduction is of very exceptional occurrence, and takes place only 

 during the intracellular phase, if at all Spores octozoic with the rarest 

 exceptions. 



TRIBE 1. ACEPHALINA, Kolliker (Monocystidea, Stein). Eugregarinae 

 in which the body is non-septate, and without an epimerite at any stage. 

 Chiefly " coelomic " parasites. 



