94 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



vol. 39. 



COXOPODIAS TRISTANI, new species. 



Body ovate, very convex, capable of being rolled up into a ball. 

 Color reddish brown, with a lateral band of light wavy lines on either 

 side of the body; surface smooth. 



Head wider than long, with the eyes small, round, composite, 

 situated close to the lateral margin; anterior margin straight, 

 the antero-lateral angles acute; front not 

 margined. 



First antennae rudimentary and inconspicu- 

 ous; second antennae with the first article 

 short, the second twice as long as the first, the 

 third about equal in length to the second, the 

 fourth a little longer than 

 the third, the fifth a little 

 longer than the fourth; fla- 

 gellum composed of two arti- 

 cles, the first of which is 

 about half as long as the 

 second. 



First segment of the tho- 

 rax the longest, about twice 

 as long as the head. The 

 epimeron or coxopodite ex- 

 tends the entire length of the 

 lateral margin, separated from the segment by a 

 longitudinal furrow; it is cleft posteriorly. There 



is also a slight furrow on the dorsal side of the 

 segment, close to the lateral margin. The sec- 

 ond and third segments of 

 the thorax are also fur- 

 nished, on the underside, 

 with small but conspicu- 

 the form of tooth-like 



Fig. 1.— Coxopodias tristani. 



Fig. 2.— Coxopodias 

 tristani. Second 



ANTENNA. 



Fig. 3.— Coxopodias tris- 

 tani. First three seg- 

 ments OF THORAX (UNDER- 

 SIDE). 



ous 



coxopodites in 

 processes. 



First five segments of the abdomen short and 

 subequal (the first slightly shorter than the 

 others) ; lateral parts of the first two covered by 

 the seventh thoracic segment. The abdominal 

 segments complete the oval outline of the body. 

 Sixth or terminal segment triangular with the 

 apex produced in an acute process. Basal 

 article of the uropoda obliquely quadrangular, 

 occupying all the space between the sixth abdom- 

 inal segment and the lateral parts of the fifth 

 segment; the inner posterior angle extends a little beyond the apical 

 process of the terminal abdominal segment. Inner branch of the 



Fig. 4— Coxopodias tristani. 

 First maxilla, a, Inner 



LOBE; 6, OUTER LOBE. 



