393] STUDIES ON GREGARINES—IVATSON 183 



cal to ellipsoidal from 1-1/2 to two times as wide as is the protomerite ; 

 it terminates in a broadly rounded posterior extremity. 



Color is practically absent from the animals for the body is almost 

 transparent and contains very little protoplasm in either protomerite or 

 deutomerite. The sporonts were stained with iodine or an anilin dye 

 (safranin in water) before they could be studied. 



The nucleus is small and spherical, in diameter attaining only 1/3 

 to 1/4 the width of the deutomerite. It contains one large karyosome. 



Young individuals were seen attached to epithelial cells of the intes- 

 tine by large smooth sessile transparent epimerites. No cysts were seen. 



Movement consists of very slow progression and a still slower con- 

 tortion of the body. 



The character of the epimerite and the biassociative sporonts leaves 

 no doubt that this species belongs to the genus Gregarina. It is differen- 

 tiated from the other species found in the Coccinellidae by the shape and 

 proportions of the sporonts, especially of the protomerite of the satel- 

 lite, and by size. 



A table of dimensions of a few associations is given here ; all dimen- 

 sions are expressed in microns : 



Total length association 96 108 134 141 148 



Primite : 



Length protomerite 9 11 10 10 11 



Length deutomerite ..._ 35 59 52 59 59 



Width protomerite „ 11 17 19 20 14 



Width deutomerite 21 30 30 34 30 



Total length sporont 44 70 62 69 70 



Ratio 



length protom. : total length^.... 1 :5 1 :1.3 1 :6.2 1 :6.9 1 :6.3 



width protom. : width deutom. .1 :1.9 1 :1.8 1 :1.6 1 :1.7 1 :2.1 



Satellite : 



Length protomerite 8 7 8 8 6 



Length deutomerite 44 71 64 64 72 



Width protomerite 14 26 20 20 21 



Width deutomerite _ _ 22 35 27 30 23 



Total length sporont 53 78 72 72 78 



Ratio 



length protom.: total length 1:6.5 1:11 1:9 1:9 1:13 



width protom. : width deutom....l :1.6 1 :1.4 1 :1.3 1 :1.5 1 :1.1 



Diameter nucleus 9 8 



