190 



ILLINOIS BIOLOGICAL MONOGRAPHS 



[Am 



the satellite. The individuals of an association are easily detached by 

 slight pressure. 



In color, this species is dark and gray, especially in the deutomerite ; 

 the protomerite is less dense. The nucleus is not visible in the live animal. 



Trophozoites and cysts were not seen. 



A table of measurements, in which dimensions are given in microns^ 

 follows : 



Total length association 320 304 



Primite : 



Length protomerite _ 40 



Length deutomerite ~ 120 



Width protomerite 45 



"Width deutomerite 80 



Total length sporont .„ 160 



Ratio 



length protom. : total length 1 :4 



width protom. : width deutomerite..- 1 :2 



Satellite : 



Length protomerite _ 



Length deutomerite — 



"Width protomerite 



"Width deutomerite 



30 



130 



50 



70 



160 



Total length sporont 



Ratio 



length protom. : total length 1 :5.3 



width protom. : width deutomerite 1 :1.4 



33 



137 



42 



80 



170 



1:5 



1:2 



20 



114 



32 



75 



134 



:6.7 

 :2.3 



30 



130 



42 



70 



150 



1:5 

 1:1.6 



35 



135 



55 



82 



170 



1:5 

 1:1.5 



GREGARINA MONARCHIA Watson 



[Figure 167] 



1915 Gregarina monarchia 



Watson 



1915:31 



Host -.Pterostichus stygicus (Say). 

 Location : Urbana, Illinois, November, 1914. 



Only one parasite was seen in the intestine of the host. The same 

 beetle was infected with Gregarina fragilis. 



The sporonts are biassociative. The body is very long and sausage 

 shaped, easily visible to the eye. The protomerite of the primite is dome 

 shaped, widest just below the middle portion, is but little wider than high, 

 and in length equal to one seventh the total length of the sporont. There 

 is a deep constriction at the septum. The deutomerite is cylindrical, of 



