606 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



spicuous. The first article of the second antenna? is short; the second 



and third are subequal and each is more than twice as long as the first; 



the fourth is nearly twice as long as either of the two preceding; the 

 fifth is one and a half times longer than the fourth. 

 The flagellum is composed of three nearly subequal 

 articles, the third being a little longer than the second. 

 The second antennae extend to the posterior margin 

 of the third thoracic segment. The maxilliped has a 

 palp of three articles. The palp of the mandibles is 

 wanting. 



The segments of the thorax are subequal, the first 

 segment being, perhaps, a little longer than any of the 

 others. There are no epimera separated off on any of 

 the segments. 



The abdomen is abruptly narrower than the thorax. 

 The first two segments are covered at the sides by the 

 seventh thoracic segment. The lateral parts of the 

 segments are not developed. The sixth, or terminal 

 segment, is triangular in shape, with the apex not 

 produced but rounded. The peduncle of the uropoda 

 extends to the extremity of the abdomen. The inner 

 branch extends half a millimeter beyond the terminal 

 abdominal segment. The outer branch is not half a 

 millimeter longer than the inner branch. 

 All the legs are ambulatory. 

 Color brown, with lateral margins light and a narrow longitudinal 



light area or band in the middle of the dorsal surface, separating the 



two wide dark bands. 



PHILOSCIA BREVICORNIS Budde-Lund. 



Philosda brevicornis BUDDE-LUND, Crust. Isop. Terrestria, 1885, pp. 218-219. 

 RICHARDSON, American Naturalist, XXXIV, 1900, p. 305; Proc. U. S. Nat. 

 Mus., XXIII, 1901, p. 565. 



Locality. Biloxi, Mississippi. 



Body oblong-oval ,*subcon vex, smooth, slightly covered with a few 

 dots. 



Second pair of antennae shorter than half the length of the body; 

 articles of the flagellum short, subequal. 



Frontal margin produced a little in the form of an arch in the mid- 

 dle, almost entirely inconspicuous; epistome subconvex in the middle. 



Abdomen scarcely abruptly narrower than the thorax. The termi- 

 nal segment short, almost triangular, with sides slightly incurved, and 

 apex obtusely rounded; sulcate above. 



The color varies in the two specimens, being a very light or a very 



FIG. 663. PHILOSCIA 

 VITTATA. a, SECOND 



ANTENNA. X 27}. b, 



UROPOD. 51f. 



