182 ILLINOIS BIOLOGICAL MONOGRAPHS [392 



GREGARINA MINTJTA Ishii 

 [Figure 143] 



1914 Gregarina minuta Ishii 1914 :436-7 



Gregarina: Sporonts biassociative, length of associations 118/t, 

 length primite 58/t. Ratio length protomerite : : total length : : 1 : 9 ; 

 width protomerite : width deutomerite :: 1 : 1.7. Protomerite some- 

 what flattened, rounded anteriorly, twice as wide as high. No constric- 

 tion at septum. Deutomerite cylindrical, broadly rounded at posterior 

 end. Endocyte not dense. Nucleus large, spherical, with one karyosome. 



Cysts spherical, 36 by 48/*. 



Taken in the province of Izu, Japan. Host: Tribolium ferrugi- 

 neum F. Habitat: Intestine. 



Under the name Gregarina minuta, the author described two greg- 

 arines belonging to widely different families, one, the larger, being a 

 Didymophyes (D. minuta), from the absence of a protomerite in the sat- 

 ellite, and the other the gregarine described above. For a detailed state- 

 ment of these facts, see article in appendix of this chapter. 



GREGARINA KATHERINA Watson 

 [Figure 171] 



1915 Gregarina katherina Watson 1915:31 

 Host: Coccinella novcmnotata Herbst. 



Location: Oyster Bay, L. I., August, 1914. 



Percent of Infection: Fourteen lady beetles of various species were 

 examined and only two found to be parasitized, one with this species, 

 the other with G. barbarara Watson. The infection with this gregarine 

 was very heavy, the whole alimentary tract being filled with parasites 

 which numbered into hundreds. The gregarines were practically trans- 

 parent and it was impossible to count them. 



The sporonts are biassociative when adult. The shape is that of a 

 typical gregarine of this genus. The protomerite of the primite is wid- 

 est at the mass, rounded at its free ends and more or less flattened at 

 the apex. It is 1 1/4 to 1 1/2 times as wide as high, and constricted 

 slightly at the septum. The protomerite of the satellite is flattened top 

 and bottom and three to four times as wide as high. Its upper and 

 lower surfaces are about equal in width. The deutomerite is cylindri- 



