PHILOSCIA. 449 
segment, shutting out the orbit from the insertion of the 
external antennz, and a deep sulcus separating it from 
the external angle of the orbit; the third ring being 
thus transverse and narrow. The second ring is nearly 
as deep as the third, and well marked; the epistomal 
narrow, and formed of two triangles placed apex to apex. 
The orbits are open below and behind.”—Kinahan. 
The inner antennz are very small, conical, and three- 
jointed. The outer antenne are cylindrical and eight- 
jointed, the three terminal joints forming the flagellum, 
which is tipped by a small short articulus. The legs 
have the lower margin of the intermediate joints armed 
with bristles; they are terminated by a very minute 
hook or finger, which is slightly bifid at its tip. 
The two anterior segments of the tail are not produced 
into exserted lateral angles, as is the case with the three 
following. They are, however, narrower than the ter- 
minal segments of the body. The terminal segment is 
triangular, with the sides slightly emarginate for the 
insertion of the caudal appendages, which are elongated, 
and have the basal portion uncovered; the inner ramus 
of each is more than half the length of the outer. 
The species are found in dry moss, at the roots of 
trees, and under leaves and stones. They run with great 
quickness, and do not hide away from the light. They 
do not attempt to roll themselves up into a ball, but 
feign death when alarmed. 
VOL. Il. GG 
