RICHARDSON] TERRESTRIAL ISOPODS OF FAMILY EUr.El.IH.F 241 



the segment and are cleft posteriorly, the fissure not being deep, 

 and the inner portion separated smaller than the outer. Coxopodites 

 are present on the anterior portion of the second and third thoracic 

 segments on the underside in the form of thickened ridges, thicker 

 on the second than on the third segment. 



The first two segments of the abdomen have the lateral parts cov- 

 ered by the seventh thoracic segment. The lateral parts of the 

 three following segments are well developed and are directed back- 

 ward. The first, second, and fifth segments are subequal and are 

 somewhat shorter than either the third or fourth, which are also 

 subequal. The sixth or terminal segment is triangular at the base, 

 with the apex produced in a rather wide process, with sides parallel 

 and extremity rounded. The basal article of the uropoda is quad- 

 rangular in shape and occupies all the space between the lateral 

 parts of the fifth abdominal segment and the apical process of the 

 sixth segment. It extends to the extremity of the lateral angles of 

 the fifth segment as well as to the tip of the apical process. The 

 posterior margin has a deep notch about the middle, on either side 

 of which the lateral angles are produced in rounded lobes, the 

 inner one being the longer. The outer branch of the uropoda is 

 large and conical in shape, and extends for about half its length 

 beyond the inner lateral angle of the basal article. The inner 

 branch extends to the extremity of the apical process of the terminal 

 abdominal segment. All the legs are ambulatory. 



Three specimens of this species were collected in Liberia — one at 

 Alt. Coffee by Dr. O. F. Cook, another at Mt. Coffee by Mr. Collins, 

 and another by Dr. O. F. Cook from a locality not named. 



The type is in the possession of Dr. O. F. Cook. 



This species resembles superficially Mesarmadillo quadrimacu- 

 latus in the color markings, having the four large yellow spots, 

 as in that species, one on either side of the second thoracic seg- 

 ment and one on either side of the seventh thoracic segment. This 

 species, however, belongs unmistakably to the genus Ethelum, hav- 

 ing but two' articles to the flagellum of the second antennas. Mesar- 

 madillo quadricoloratus also has four large yellow spots, but they 

 are placed one on either side of the third thoracic segment and one 

 on either side of the seventh thoracic segment. 



ETHELUM ATTENUATUM, sp. nov. 



Body ovate, convex, contractile into a ball. Surface smooth, 

 punctate. Color, yellow, mottled with brown on the posterior half 

 of the bodv. 



