72 ILLINOIS BIOLOGICAL MONOGRAPHS [72 



extremity. Epimerite a deep urn bordered with many short recurved 

 hooks, superimposed upon a long slender neck two-thirds as long as the 

 whole animal. Nucleus elongate-ovoidal, with one dumb-bell shaped 

 karyosome. 



Cysts spherical, 20(V, spores smooth crescents 15 by 4/z. 



Taken in Poitou, France. 



Intestine of Agrion puella, larva. 



Species of Uncertain Position 



[? psocorum von Siebold] 



1839 Gregarina Psocorum von Siebold 1839: 67 



1846 Gregarina Psocorum Frantzius 1846: 25 



1848 Gregarina Psocorum Frantzius 1848: 195 



1851 Gregarina ovata Diesing 1851: 10 



1863 Gregarina Psocorum Lankester 1863: 94 



1911 Hyalospora psocorum Wellmer 1911: 124 



The only data outside the original reference, which is not available, 

 are those of Diesing (1851): 



Proboscis .... Receptaculum compressum. Corpus ovalum utrinque obtusum, recepta- 

 culo triple longius. Longit. crassit . . . 



Host: Psocus sp. 



LIST OF SPECIES FOUND IN THE ORDER LEPIDOPTERA OF 

 THE CLASS HEXAPODA 



PARASITE HOST 



GJUEGARINIDAE 



Leidyana tinei Keilin Endrosis fenestrella Stain., larv. 



TONAMED SPECIES Keilin Oecophora pseudopretetta Stain., larv. 



Tinea pattescentetta Stain., larv. 



Family GREGARINIDAE Labbe 1899: 9 

 Genus LEIDYANA Watson 1915: 35 



Sporonts solitary, epimerite a small sessile knob, dehiscence [by 

 spore-ducts. Spores in chains, barrel-shaped. 



LEIDYANA TINEI Keilin 



[Figures 115 and 116] 

 1918 Leidyana tinei Keilin 1913. 406 



Sporonts solitary, long-ellipsoidal. Ratio LP:TL: :1: 7.5; WP:WD: : 

 1 : 1.7. Maximum length 300 M , width 85ju. Protomerite hemispherical, 

 deutomerite regularly ellipsoidal, tapering gently to a blunt posterior 

 end. 



Cysts spherical HO/* in diameter. Spores barrel-shaled, 7/i long. 



Intestine of Endrosis fenestrella Stain. 



Taken at Cambridge, England. 



