132 



ILLINOIS BIOLOGICAL MONOGRAPHS 



[342 



DIDYMOPIIYES GIGANTEA Stein 



[Figures 61, 63] 



1848 Didymophyes gigantea 



1863 Gregarina gigantea 



1889 Didymophyes gigantea 



1892 Didymophyes gigantea 



Stein 

 Lankester 

 Mingazzini 

 Leger 



1848 :186 

 1863 :95 

 1889 :234-9 

 1892 :106 



Didymophyes: Sporonts biassoeiative, slender, very much attenu- 

 ated. Average length 1 em., average width 80 to lOOju,. Ratio length pro- 

 tomerite : total length primite : : 1 : 30 to 1 : 40 ; width protomerite : 

 width deutomerite : : 1 : 0.66 to 1:1. Protomerite dome shaped with 

 a short wide neck just anterior to septum. Deutomerites two in num- 

 ber, cylindrical, widest at septum and tapering gradually, ending in a 

 blunt rounded extremity.* Septa convex upward. Deutomerites nearly 

 equal in length. Nuclei not visible in vivo and not described. Endo- 

 cyte dense, deeply staining. Epimerite a cylindrical-conical papilla. 



Cysts spherical, 600 to 700ft in diameter. Spores ovoidal, two in- 

 teguments, 6 by 6.5)u,. 



Taken at Berlin, Naples, and Poitiers. Hosts: Larvae of Oryctes 

 nasicornis (L) ; o£ Phyllognathus sp. and of Oryctes sp. Habitat: In- 

 testine. 



DIDYMOPHYES PARADOXA Stein 



[Figures 62, 72] 



1848 Didymophyes paradoxa 



1863 Gregarina paradoxa 



1892 Didymophyes rara 



1899 Didymophyes paradoxa 



Stein 

 Lankester 

 Leger 

 Labbe 



1848 :223 

 1863 :95 

 1892 :106 

 1899 :8 



Didymophyes: Sporonts biassoeiative, short. Length and width 

 not given. Ratio length protomerite : total length : : 1 : 7 to 1:9; 

 width protomerite : width deutomerite : : 1 : 1 to 1.1 : 1. Protomerite 

 dome shaped, considerably flattened, twice as wide as high, a little wider 

 than deutomerite. First deutomerite cylindrical, of same length or li^ 

 times longer than second ; second tapering to a blunt point. Septa con- 



. *Stein's figure indicates that the first deutomerite in its anterior third is nar- 

 rower than at the first septum, becoming as wide at the septum between the two 

 deutomerites as it is at the septum between protomerite and the first deutomerite. 

 This width is retained throughout the second deutomerite. 



