395] STUDIES ON GREG ARINES WATSON 185 



A list of the essential measurements with dimensions in microns is 

 appended : 



Total length association 283 275 220 192 



Primite : 



Length protomerite 



Length deutomerite 



Width protomerite 



Width deutomerite _ 



Total length sporont _ 



Eatio 



length protom. : total length 1 :7 1:61 :5.8 1 :6.2 



width protom. : width deutomerite 1 :2.5 1 :2.2 1 :2.2 1 :1.9 



Satellite : 



Length protomerite 17 10 18 15 



Length deutomerite 46 130 57 52 



Width protomerite 65 55 60 40 



Width deutomerite 80 80 80 68 



Eatio 



length protom.: total length 1:9.2 1:14 1:4.2 1:4.5 



width protom. : width deutomerite 1 :1.2 1 :1.4 1 :1.3 1 :1.7 



Diameter nucleus 10 



This species is considerably larger than Gregarina katherina. 



GEEGAEINA FEAGILIS Watson 



[Figure 175] 



1915 Gregarina fragUis Watson 1915:32 



Host : Coccinella sp. 

 Location : Urbana, Illinois, November, 1914. 



The intestine of the host is the seat of infection. Out of thirty or 

 more lady beetles of many species which were examined, only two yielded 

 parasites. About twenty-five associations were found in the two hosts. 



The sporonts are biassociative. The protomerite of the primite is 

 cylindrical, rounded at the corners and nearly flattened anteriorly ; it is 

 about 1 2/3 times as wide as high. A shallow constriction or none at all 

 is present at the septum. In the satellite, the protomerite is altered 

 slightly in shape, being both flattened and broadened. The deutomerite is 

 subglobular, widest in the middle or slightly posterior to the middle and 

 terminates in a broadly rounded extremity. The satellite is smaUer than 

 the primite and less nearly globular in shape. 



