686 
Nucleus only visible after the use of reagents, from one-half to 
seven-eighth of the size of the endocyte of the protomerite. 
Epicyte thin and flexible, showing a thickened area in the extreme 
anterior portion of the protomerite, thinner in the median line thus pro- 
ducing the ‘apparent pore and canal’ noted for the previous species. 
Sarcocyte very thin over the major portion of the deutomerite, 
much thickened in the anterior portion of the deutomerite, in the 
protomerite, and in large specimens, in the posterior tenth of the deuto- 
merite. 
Endocyte of the protomerite gray and very dense, irregularly cir- 
cular or pentagonal in outline, not filling the protomerite completely; 
the median portion of the anterior margin always straight or slightly 
concave away from the anterior end. Endocyte of the deutomerite dark 
gray, dense and opaque, filling the deutomerite quite completely. 
A very active gregarine continually bending the long deutomerite 
and moving rather rapidly. Although the same structure of protomerite 
was noted for this species as for the proceeding one, S. cockerellae, it 
was not observed to protrude an expansible papilla. For the com- 
parative measurements for this species see the table under S. cockerellae. 
Infection considerable in the hosts examined. 
Stylocephalidae. 
3) Stylocephalus ensiferus sp. nov. (fig. 5). 
Type locality, Quirigua, Guatemala. February 1912. 
Host, Leptochirus edax Sharp, a Staphylinid beetle: Det. Col. 
T. L. Casey, who states that the specimens are a variety of this species. 
2 
U 
p R Ss 
Figure 5. Stylocephalus ensiferus. "P", cephalont 60 u; "R", sporont 47u; "S”, 
sporont 65 u. 
Average specimens, 40 u to 65 u. 
Habitat, intestine. 
Length of the epimerite about equal to, width of the epimerite at 
base 2,5 to 3 in the length of the protomerite; length of the protomerite 
