DESCRIPTION OF A NEW TERRESTRIAL ISOPOD BELONG- 

 ING TO THE GENUS CUBARIS FROM PANAMA. 



By Harriet Richardson, 



Collaborator, Division of Marine Invertebrates, United States National Museum. 



Two specimens of an isopod, representing a new species of Cubaris, 

 were collected by Mr. E. A. Schwarz at Porto Bello, Panama, where 

 he found it to be very abundant. Mr. Schwarz says that he "fre- 

 quently beat it down on his umbrella from bushes or trees after 

 heavy showers and during the drier weather it was to be found 

 under rubbish on the ground. Smaller specimens were also seen 

 but not collected. The species was not seen in the Canal Zone 

 proper." 



CUBARIS LONGISPINIS, new species. 



Body contractile, capable of being rolled into a ball; dorsal 

 surface covered with long spines; color brown, mottled with 

 yellow. 



Head wider than long; front slightly excavate in the middle, 

 the antero-lateral angles produced and rounded; eyes small, round, 

 composite, situated close to the lateral margin, half way between 

 the anterior and posterior margins. Just back of the anterior 

 margin is a row of four short spines, two on either side of the 

 median line, the two outer being slightly longer than the two 

 inner. (See fig. 1.) Close to the posterior margin is a row of six 

 long spines, three on either side of the median line, the two 

 outer and the two inner being longer than the others. Between the 

 two rows of spines are two small spines, one on either side of the 

 median line. Altogether there are twelve spines on the head. First 

 antennas small and inconspicuous; second antennas with a flagellum 

 composed of two articles, the second of which is twice as long as 

 the first. 



First segment of the thorax, with the lateral parts large and 

 expanded, the antero-lateral angles extending forward as far as 

 the antero-lateral angles of the head, the post-lateral angles being 



Proceedings U. S. National Museum, Vol. 42— No. 1911. 



477 



