VOL. XII, PP. 39-40 MARCH 24, 1898 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



DESCRIPTION OF A NEW PARASITIC ISOPQD OF THE 

 GENUS ^EGA FROM THE SOUTHERN COAST OF THE 

 UNITED STATES.* 



BY HARRIET RICHARDSON. 



Two specimens of a species of Mga,, heretofore undescribed, 

 were obtained by the U. S. Fish Commission steamer 'Albatross' 

 during its cruises in 1885 and 1886 one off Little Bahama Bank 

 and the other between the delta of the Missis 

 sippi and Cedar Keys, Florida. They present 

 no unusual characters, but differ from any of 

 the known species of 



2Bga ecarinata sp. nov. 



Body elongate and narrow. Length more than 

 three times greater than breadth. Surface punctate. 

 Frontal margin of head Insinuated, the acumen sepa 

 rating the first pair of antennae. Eyes large and ob 

 long and situated at a small distance apart. First pair 

 of antennae extending almost to the flagellum of the 

 second pair of antennae ; the first two joints of pedun 

 cle very broad ; second joint extending anteriorly over 

 the third joint, reaching almost to the extremity of 

 that joint ; third joint two-thirds narrower than first 

 and second ; the flagellum containing nine articles. 

 Second pair of antennae extending to the middle of 

 the first thoracic segment ; flagellum containing ten 

 articles. 



Epimera of all the thoracic segments narrow, the 



FIG. 1. JEga ecarinata 

 (X 2 ). 



first two being rounded, the other four more acute at 



their extremities. First two pairs of prehensile legs rather stout; third 



* Published by permission of the Secretary of the Smithsonian Insti 

 tution. 



9 BIOL. Soc. WASH., VOL. XII, 1898. (39) 



