590 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



"Body convex, rather narrow, smooth. Cephalon: prosepistoma 

 with a small shield-like convexity; the prosepistoma is continuous with 

 the forehead in the middle and separated from it on both sides by a trans- 

 verse, incomplete, preocular cut. Eyes moderate; ocelli about 12. 

 Antennae short; flagellum small, first joint three times shorter than 

 the second. Pereion : first segment with the antero-median tubercle 

 hardly perceivable; coxopodites distinct on the entire length of the 

 edge of the segment (upper side), forming a thick border, slightly 

 crossed by the posterior angle of the segment. Coxopodite of the sec- 



FIG. 650. ETHELUM AMERICANTJM (AFTER DOLLFUS). a, HEAD AND FIRST TWO SEGMENTS OF THO- 

 RAX (UPPER SIDE). 6, THE SAME (UNDERSIDE), c, FIFTH AND SIXTH SEGMENTS OF ABDOMEN 

 (UPPER SIDE), d, THE SAME (UNDERSIDE). 



ond segment hardly visible as a very small dentiform processus before 

 the legs. Pleon, telson: pleotelson flat, with curved sides and rounded 

 apex. Uropoda: basis with a large, oblong processus, extending 

 between the lateral part of the fifth segment of the pleon and the 

 pleotelson; endopodite reaching to two-thirds the length of the pleotel- 

 son; exopodite minute, placed at the top of the basal processus. 

 Color: brownish, with small light lineolae on the pereion; flagellum 

 white; uropoda reddish. Dimensions: 6 by 2 mm." DOLLFUS." 



ETHELUM REFLEXUM (Dollfus). 



Mesarmaditto reflexus DOLLFUS, Proc. Zool. Soc. London, 1896, pp. 398-399. 

 RICHARDSON, Proc. U. S. Nat. Mus., XXIII, 1901, p. 573. 



Ethelum reflexum BUDDE-LUND, A Revision of "Crustacea Isopoda Terrestria," 

 1899, pp. 25-26; Ent. Meddel. (2), I, Pt. 2, 1899, pp. 91-92. 



Locality. St. Vincent, West Indies. Open, swampy land, under 

 rubbish. 



a Proc. Zool. Soc. London, 1896, pp. 397-398. 



