401] STUDIES ON GREGARINES— WATSON 191 



even width throughout and but little wider than the protomerite. It is 

 broadly rounded at the free extremity. The protomerite of the satellite 

 is flattened top and bottom, twice as wide as high, and in length averages 

 one sixteenth the total length of the satellite. The interlocking device be- 

 tween primite and satellite is deep and well developed. 



The body is black, the protoplasm being very dense in all parts ex- 

 cept the protomerite of the primite. This portion is nearly transparent 

 except for its lower portion in which the protoplasm is dense and darkly 

 colored. A deep groove runs crosswise just anterior to the middle portion 

 of the protomerite and in front of it is a clear vesicular area rather indis- 

 tinct in outline. The epicyte is rather thick and of the same width 

 throughout except in the protomerite of the satellite. It is considerably 

 thicker at the place of interlocking and a little thicker on the sides of this 

 protomerite than elsewhere in the association. Trophozoites and cysts 

 were not recovered. Movement of progression was not noted, but a slow 

 contortion was evinced by a slight curving of the body. 



Measurements of the one association seen are as follows, with the di- 

 mensions stated in microns : 



Total length association 1070 



Primite Satellite 



Length protomerite 80 32 



Length deutomerite 490 468 



Width protomerite 110 115 



Width deutomerite - - .130 162 



Total length sporont -'. 570 500 



Ratio 



length protom. : total length 1 :7 1 :16 



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



GREGARINA GLOBOSA Watson 



[Figure 176] 



1915 Gregarina globosa Watson 1915 :31 



Host: Coptotomus interrogatus (Fab.). 

 Location : Urbana, Illinois, November, 1914. 



The intestine of the host was infected ; two beetles out of six exam- 

 ined contained two associations each. 



The sporonts are biassociative. The body is subspherical, the proto- 

 merite of the primite twice as wide as high and hemispherical but rather 

 flattened at the top. There is a constriction at the septum but it is shal- 



