544 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.49. 



First thoracic segment with lateral parts large and laminar; ante- 

 rior and posterior angles rounded; dorsal surface of epimera concave; 

 bearing 29 spines. Near to the anterior margin are two large spines 

 followed by a clear space, then two smaller spines and a single median 

 spine projecting beyond the posterior border of the segment. On 

 either side of the last are two other spines of similar size. The remain- 

 ino- spines are on the sides of the segment but do not come from the 

 epimera. Each of the following six segments has 17 spines: eight 

 across the anterior borders, three near the middle of the posterior 

 border, two on either side of the posterior border (the inner. one 

 smaller), and two beyond all the others near the epimera on either 

 side. All thoracic epimera produced and flattened, rectangular with 

 rounded angles. Coxopodites distinct on first and second segments, 

 tapering with rounded tips. 



First somite of abdomen barely visible; second segment short, 

 covered laterally by last thoracic somite, unarmed; third, fourth, and 

 fifth somites each with a single stout median spine ; sixth somite with 

 a pair of lateral spines near base. Uropoda rather slender; outer 

 rami small, reaching halfway to posterior margin; inner rami minute 

 only reaching a little beyond the median constriction in the sixth 

 abdominal somite. 



The usual haunt of this little isopod was beneath the scales of a 

 tree with extremely rough bark. Once two specimens were found 

 under some stones in a dry creek bed. It was found at Fundacion, 

 La Rosa, and below the Cincinnati Coffee Plantation. 



CUBARIS GIGAS Miers. 



Nine specimens were collected under stones at Fundacion. The 

 color of this species is rather striking. There is a salmon-colored 

 band along each side of the body, extending through all the thoracic 

 epimera ; dorsum with the usual lateral marldngs ; distal half of uro- 

 poda salmon-colored. The coxopodite of the first somite is free for 

 one-third of its length and does not reach as far back as the epi- 

 merite. There is a well-developed coxopodite on the second somite. 

 Previously reported from Nicaragua. 



MINCA, new genus. 



First pair of antennae minute, triarticulate. Second pair of an- 

 tennae short; flagellum biarticulate. Eyes small, composite. First 

 maxilla with two plumose processes. First three thoracic somites 

 with coxopodites distinct from epimera. Terminal abdominal seg- 

 ment triangular. Uropoda vary broad and flat, extending beyond 

 tip of abdomen; basal segment large; entire, tetragonal; outer ramus 

 minute, inserted near center of dorsal surface of basal segment; inner 

 branch small, linear, not reaching to tip of basal article. 



Ty]je of genus. — Minca ruthveni Pearse. 



