PHILOSCIA. 449 



segment, shutting out the orbit from the insertion of the 

 external antennae, 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." Kin ah an. 



The inner antennae are very small, conical, and three- 

 jointed. The outer antennae 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. II. G G 



