316 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



posterior extremity of the lateral margin or the outer post-lateral 

 angle is slightly produced. 



The abdomen is composed of two segments. The first segment has 

 two suture lines on either side indicuting partly coalesced segments. 

 Its posterior margin has five low tubercles, two on either side of a 



Fig. 346— CiLic.EA caudata (female) (After Ives), o, Dorsal view. 



c, Fourth leS of right side. 



X 4. h, Left side, x 4. 



median one, and each with a groove in the center from which extends 

 a long movable spine-like bristle. The terminal segment has the con- 

 vex anterior half provided with one large median tubercle with a 

 groove in the center from which extends a bunch of hairs. On either 

 side of this median tubercle is a row of two large tubercles in longi- 

 tudinal series, the lower one in each series being 

 in a transverse line with the median tubercle. 

 Below this transverse row of three tubercles and 

 almost hidden by them are three small tubercles 

 in a transverse row and much closer together than 

 those directly above them. The posterior half of 

 the terminal segment is deeply excavate, the post- 

 lateral angles being very acute. Within the exca- 

 vation are four acute teeth, two on either side of 

 the center. The post-lateral angles have a small 

 rudimentary tooth on the inner side near the 

 extremity'. The fixed immovable branch of the 

 uropoda extends oidy half the length of the termi- 

 nal segment. The outer movable ])ranch is long 

 and narrow and is curved inward, so that when folded its extremity 

 meets that of the branch of the opposite side in the median line of the 

 bod3^ The outer branch is furnished on its exterior margin with 

 bimches of hairs scattered here and there. 



The legs are all ambulatory. On each segment of the thorax there 

 are seven bunches of a few hairs, forming seven longitudinal series on 

 the thorax. 



Fig. 347.— Cilic.ea cauda- 

 ta (female) (After 

 Moore), x 8. 



