1896.] NATURAL SCIENCES OF PHILADELPHIA. 265 



Scolodesmus seeuris. 



Smaller and more slender than S.grallator; of the same color, but 

 without a lighter median line or row of spots ; sternum of fourth 

 pair of legs with a large process more deeply bilobed than S. grnlla- 

 tor ; copulatory legs longer and more slender, reaching to the fourth 

 segment, in general form like those of S. grallator ; above the middle 

 a curved acicular process projects from each, and the apices of the 

 two lie in contact; apical portion gently curved mesad and pointed, 

 with a large process from the inner side with a straight inner edge, 

 its corners produced proximad and distad, suggesting the blade of 

 a Roman axe ; length of male 18 mm., width 1.6 mm ; locality, Togo 

 Coast ; a male and a female in the Berlin Museum. 



Habrodesmus falx. 



Closely resembling H. Icetus in size and form, differing in that 

 the copulatory legs end in a broad, obliquely truncate lamina with a 

 small transparent process from near the middle of the apical edge. 

 In II. ketus the distal extremity is slender and curved, with two 

 small teeth below the apex, so that the apical sinus is shaped like 

 the figure 3. Color in alcohol, brown or black ; the margins of the 

 first, the posterior margins of the other segments, the ventral sur- 

 face and legs, whitish; antennre dark ; several specimens from Togo 

 are in the Berlin Museum. A label states that the legs are (in life) 

 pinkish-red; a female specimen is slightly larger and more robust 

 than the female of H. Icetus. 



Napodesmus costatus. 



Differing from Udodesmus, to which it is nearest related, in the 

 more depressed body, the thin margins of the carinse, and the four, 

 fine, slightly elevated,. dorsal longitudinal ridges or carinse, scarcely 

 separated into their component tubercles; surface rough, uneven, 

 and finely setose, incrusted with earth, but without distinct tuber- 

 cles ; pores located at the posterior corners of segments 5, 7, 9, 10, 

 12, 13, 15-18, each surrounded by a frill of short, fine hairs ; first 

 segment with numerous large conic processes, anteriorly with four 

 large subequal lobes, each of which is incised along the margin, the 

 median with two incisions, the lateral with one; penultimate 

 segment considerably exceeding and completely concealing the last ; 

 lobed at the sides, and slightly so at apex ; length 6 mm., width 

 1.1 mm. ; locality, the forests of Western Liberia, along creeks and 

 rivers ; rare. 



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