604 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



PHILOSCIA CULEBR^E Moore. 



PMostia culebne MOORE, Bull. U. S. Fish Commission, XX, Pt. 2, 1902, p. 176, 

 pi. xi, figs. 13-17. 



Locality. Culebra, Porto Rico, from drift on shore. 

 "Body elongate-oval, about 2.5 times as long as broad; head about 



twice as broad as long, front somewhat 

 recurved between sides and middle, 

 producing the appearance of a small 

 lobe in front of each eye, sides and 

 posterior margin rounded; first sjeg- 

 ment of thorax longest, its anterior 

 and posterior margins strongly curved, 

 anterior angle rounded and projecting 

 somewhat beyond sides of head; next 

 six segments subequal in length, sec- 

 ond, third, and fourth widest, the last 

 three successively narrower; posterior 

 angles of last four segments produced, 

 successively increasing in length, that 

 of last reaching almost to posterior 

 border of third abdominal segment; 

 abdomen almost as long as last three 

 segments of thorax, gradually decreas- 

 ing in width posteriorly; segments sub- 

 equal in length, the sides of the first 

 more or less concealed by the lateral 

 angle of the last thoracic segment; 

 telson short, hardly longer than other 

 segments, produced to a blunt point in 

 median line posteriorly. 



"Eyes moderate (for the genus); 

 first antennae minute, second antennas 

 when laid against sides of body extend- 

 ing to about end of second thoracic 

 segment, spinulose; peduncle, five- 

 jointed; first joint, short; second and 

 third, equal; fourth, longer; fifth, long- 

 est, equal to third and fourth com- 

 bined; flagellum three- jointed, about 

 equal to last joint of peduncle. Man- 

 dible with narrow four or five dentate 

 tip, at the base of which are two plumulose setse, and lower down a 

 brush of fine sette; no palp. First maxillae with inner plate furnished 

 with several small spines; outer plate with many. 



FIG. 660. PHILOSCIA CULEBRA (AFTER 

 MOORE), a, DORSAL VIEW. 6, SECOND 

 ANTENNA, o, MANDIBLE, d, FIRST LEG. 

 e, FOURTH LEG. 



