395] STUDIES ON GREGARINES— WATSON 185 



A list of the essential measurements with dimensions in microns la 

 appended : 



Total length association 283 275 220 192 



Primite : 



Length protomerite _. 17 



Length deutomerite 103 



Width protomerite 28 



"Width deutomerite 80 



Total length sporont- 120 



Eatio 



length protom. : total length 1:7 



width protom.: width deutomerite 1:2.5 



Satellite : 



Length protomerite 17 



Length deutomerite 46 



Width protomerite 65 



Width deutomerite 80 



Ratio 



length protom. : total length 1 :9.2 



width protom. : width deutomerite 1 :1.2 



Diameter nucleus „ 10 



This species is considerably larger than Oregarina katherina. 



GREGARINA FRAGILIS Watson 

 [Figure 175] 

 1915 Gregarina fragilis 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 smaller than 

 the primite and less nearly globular in shape. 



