12 



EICHARDSOX — FOUR NEW SPECIES OF ROCINELA. [Jan. 21, 



III. 



Rocinela cornuia, sp. nov. Figs. 1,2. 



Length of body, two and one-quarter times its greatest breadth. 

 Outline, oval; surface smooth, with scattered points of depression. 

 Head subtriangular, having a medium excavation. 

 Its frontal margin is produced forward in a long 

 and broad projection, widely rounded at its ex- 

 tremity, and curving upward. Eyes large and 



Fig. I. — Head, situated at some distance apart. The first antenna 

 X i^' 



"" reaches the anterior margin of the first thoracic 



segment ; its flagellum contains six articles. The second antenna 



extends to the posterior margin of the second thoracic segment ; 



Its flagellum is sixteen-jointed. 



The thoracic segments are subequal. The antero-lateral angles 



of the first segment are greatly produced 



and extend forward a little less than 



half the length of the head, including 



the projection. These antero-lateral 



projections of the first segment do not 



follow closely the lines of the head, 



but rather extend out straight in a 



direction which is parallel to that of 



the frontal projection of the head. 



The extremities of these projections 



are rounded. The epimera of all the 



segments point downward and do not 



extend beyond the post-lateral angle 



of their respective segments with the 



exception of the sixth and seventh 



ones. 



The first segment of the abdomen 



is almost entirely covered by the 



seventh thoracic segment. The last 



segment is rounded posteriorly and 



is faintly crenulate. The two branches of the uropods are similar 



in shape and size ; the inner branch, being the longer, reaches the 



extremity of the abdomen. The uropods as well as the abdominal 



segment are furnished with hairs. 



The propodus of the prehensile feet is armed with three spines, 



Fig. 2. — a. Rocinela cor- 

 nutay ^, slightly reduced. 



b. Leg of first pair, X 4. 



c. Leg of fourth pair, x 4- 



