108, ILLINOIS BIOLOGICAL MONOGRAPHS [318 



GREGARINA CONSOBRINA EUis 



[Figure 196] 



1913 Gregarina consohrina Ellis 1913b :267 



Gregarina: Sporonts biassociative, obese. Average length of 

 sporonts 600/a, average width 450/a. Ratio length protomerite : total 

 length primite :: 1 : 3.5 to 1 : 4; width protomerite : width deuto- 

 merite : : 1 : 1.5. Protomerite hemispherical, no constriction at sep- 

 tum. Deutomerite subspherical to ovoidal, nearly or quite as wide as 

 long, broadly rounded posteriorly. Endocyte not described. Nucleus 

 not seen. Epimerite short, simple, digitiform. 



Cysts 250 to 300/x, in diameter. Spore duets 4 to 6, all in one hemis- 

 phere, 900 to 1200/* in length. Spores extruded in chains, cylindrical, 

 3.2 by 8/t. 



Taken at Boulder, Colo. Host: Ceuthophilus valgus Scudder. 

 Habitat : Intestine. 



GREGARINA ILLINENSIS Watson 

 [Figure 207] 

 1915 Gregarina illinensis Watson 1915:34 



Host: IscTvnoptera pennsylvanica (de Geer). 



This species was taken at Urbana, 111., in November, 1914. The 

 intestine of one field cockroach was found to contain twenty-five asso- 

 ciations. A dozen or more immature specimens of the insect were 

 collected at various times throughout the fall but only the one was 

 infected. 



The sporonts are biassociative and elongate cylindrical in shape. 

 The maximum length of an association seen was 1110/a, length of the 

 primite being 550/a, its width 180/x,. Ratio length protomerite : total 

 length primite : : 1 : 5 ; width protomerite : width deutomerite : : 

 1 : 1.1 to 1 : 1.5. The protomerite of the primite is dome shaped, the 

 width equalling the height. The widest part of the primite is the mid- 

 dle portion. There is a constriction, not very deep, at the septum. 

 The protomerite of the satellite is rectangular in shape, 1.5 times as 

 wide as high and depressed at the anterior end into which concavity 

 the primite fits. The deutomerite is regularly cylindrical, elongate and 

 well rounded at the posterior end. The nucleus is large and spherical, 

 and contains many small chromidia. The endocyte is dense in both 



