66 ILLINOIS BIOLOGICAL MONOGRAPHS [66 



long as wide), tapering upward from septum to a blunt conoidal anterior 

 end. Deep constriction at septum. Deutomerite of same shape as proto- 

 merite and but little longer. Epimerite a flat disc with milled border and 

 long blunt central style set upon a fairly stout neck. Nucleus ovoidal with 

 several karyosomes. Cysts spherical, 150-200/i. Dehiscence by simple 

 rupture. Spores cylindro-biconical, 8 by 3.5n. 



Host: Larva of Rhyacophila sp. Intestine. 



Taken in the Valley of the Loire, France. 



ASTEROPHORA ELEGANS Leger 



[Figures 23, 24, and 43] 



1892 Asterophora elegans Leger 1892: 131 



1899 Asterophora elegans Labbe 1899: 22 



1903 Asterophora elegans Minchin 1903: 200,336 



Sporonts solitary, elongate ovoidal. Length 450ai. Width not given. 

 Ratio LP:TL: :1:3; WP:WD: :1:1.1. Protomerite very elongate (almost 

 twice as long as wide), tapering regularly upward from septum to a long 

 blunt anterior end. Deep constriction at septum. Deutomerite of same 

 shape as protomerite but twice as long. Epimerite a flat disc with a milled 

 border and a short central style set upon a fairly stout neck which is of the 

 same length as the protomerite. Nucleus slightly ovoidal with several 

 karyosomes. 



Cysts spherical, 300 to 400^*. Spores biconical, much larger than in 

 Asterophora mucronata, 12.7 by 4.25/1. 



Intestine of Phryganea grandis, larva, Sericostoma sp., larva. 



The former host is also parasitized with Pileocephalus heerii, the two 

 parasites generally found together. Sericostoma is also parasitized with 

 Discorhynchus truncatus. 



Genus DISCORHYNCHUS Leger 1892: 134; Labbe 1899: 20 



Epimerite a short-stalked, large flattened globular structure with a still 

 larger horizontal collar around its base. Spores biconical. 



DISCORHYNCHUS TRUNCATUS (Leger) Labbe Type species 



[Figures 28 and 29] 



1892 Discorhynchus truncatus Leger 1892: 134 



1899 Discorhynchus truncatus Labbe 1899: 20 



1903 Discorhynchus truncatus Minchin 1903: 199, 337 



1913 Discorhynchus truncatus Ellis 1913: 275 



