108 
A New Gregarine 
them ; the Actinocephalidae have navicular or cylindro-biconical spores 
and solitary sporonts; all the members of the Dactylophoridae possess 
an asymmetrical epimerite, long cylindrical spores, dehiscence by 
a lateral pseudocyst, and moreover they all inhabit myriapods; the 
Gregarinidae have always a simple epimerite; the Didymophyidae form 
peculiar syzygies in which there is no septum in the satellite. 
The parasite which we have described, therefoi’e, is sufficiently 
distinct to be considered the representative of a new family for which I 
propose the title Agrippinidae\ which includes those cephaline eu- 
gregarines tvliicli form symmetrical unarmed spores, oval in shape; in 
which there is no syzygy formation, and which have a symmetrical 
digitate epimerite. 
I propose the parasite be named Agrippina bona nov. gen. et nov. 
sp. I recapitulate the dimensions of the various types;—sporozoite 
4-4'5 p; small trophozoite 12'5-16'5 p; adult trophozoite 55 p; sporont 
175 p; cyst 85 p; spore 6'6-7p. 
REFERENCES. 
Labb^ (1899). Sporozoa in “Das Tierreich,” v. 
L:fiGER (1892). Tahlettes zoologiqiies, in. 1, 2, pp. 1-182. 
Wenyon (1911). Oriental Sore in Bagdad together with observations on a gregarine 
in Stegomyia fasciata etc. Parasitology, iv. p. 273. 
EXPLANATION OF PLATE IV. 
The gut of the flea larva having been torn open the photograph was taken of the 
living mass. The nucleated epithelium is seen to the right with a small portion of a 
Malpighian tube below at the edge of the field. The dark central mass is undigested food, 
and the gregarines are seen in large numbers gathered round it as sporonts or attached 
to the epithelium as trophozoites. 
