(he) 
was of a 220 « individual and a 245 u one. The associations were of 
two types, either simple, i. e., composed of two individuals, or multiple, 
composed of several pairs of individuals. The multiple associations as 
far as observed were always made up of an even number of individuals, 
just as if several simple associations had become joined into a string of 
individuals. The uniting of several individuals in association has already 
been described for Hirmocystis polymorpha Leger? and for Gregarina 
socialis Leger. The multiple association of Gregarina longiducta differs 
from those of the two first mentioned species in that it lacks the small 
individuals attached to the last large individual of the series and is 
composed of an even number of individuals. In the small simple asso- 
ciations the deutomerites were shorter and more globose than those of 
the individuals of average sized associations. 
Cephalont. The protomerite and deutomerite of the cephalont 
are very much the same size and both are rather globose. The epimerite 
is a small digitiform structure, (see fig 6), about one-half the length of 
the deutomerite. The largest individuals seen with the epimerite were 
200 « in length The small sporonts of which very few were seen, are 
rather intermediate between the primites of small associations and the 
cephalonts. 
Cysts. The cysts were recovered in considerable numbers from 
the excrement of the host and a few were found in the alimentary canal 
of animals killed immediately after they were collected. In general the 
excrement of a cricket which had been starved for three days yeilded 
more cysts than that of individuals which had been kept in captivity for 
a longer time or those fresh from the field. On one occasion, July 15, 
53 cysts were taken from a single discharge of excrement from a cricket 
which had been in captivity for three days. Rarely however were more 
than 6 cysts taken from a single mass. The cysts when first discharged 
or as found in the alimentary canal of the host are spherical and covered 
with two hyaline gelatinous envelopes. The outer of these envelopes is 
the thicker although the less dense. This envelope is often more or less 
torn and may contain entangled fragments of excrement. Inside of this 
outer envelope and covering the cyst proper is a second thinner but more 
dense envelope which has a slightly different refractive index and conse- 
quently is easily seen. This inner envelope is much tougher than the 
outer one and when a cyst was subjected to pressure under a coverglass 
the former would remain in tact until the entire cyst was ruptured, after 
which fragments of the inner envelope were still recognizable in the 
otherwise homogeneous mass. The cyst proper is densely opaque, being 
2 Leger, Tabl Zool. 3, p. 113, t. 3, 1892. 
3 Leger, Arch. f. Protistke. Bd. vii, S. 106—130, 1906. 
