94 EAST AFRICAN POLYDESMOIBEA— COOK. vol. xviii. 



Last segment very short, triangular, the apex narrow. 



Sterna spined at the base of each leg. 



Sternum of segment 6 of male with two processes. 



Sternum of segment 15 of male normal. 



Male legs crassate and inferiorly tuberculate, the first six pairs witli 

 a large, fleshy sole. 



Description. — Body of medium size, about four times as long as broad, 

 oblong, very abruptly narrowed anteriorly, truncate posteriorly. 



Vertex smooth, sulcus distinct; i^ost-antennal sense organ very large, 

 distinct from the antennal socket by less than half the diameter of the 

 organ; post-antennal suture distinct; lateral margin subentire. 



Labrum with shallow emargination and three small rounded teeth of 

 moderate length ; supralabral bristles very numerous. 



AntenuiTB filiform, second joint longest; joints 2, 3, 4, 5, G subequal; 

 olfactory cones four, arranged in a square. 



Mouth parts probably as in the genus AulmJesmns. 



First segment three times as broad as long; anterior and posterior 

 margins medianly straight and subparallel; lateral end rounded, the 

 l^osterior corner broadly truncate, the anterior slightly so; the segment 

 is much broader than the head, twice as long, and somewhat narrower 

 than the exposed portion of the second segment. 



Segments smooth and shining, without markings. 



Lateral carime approximate, about one-fourth as wide as the body 

 cavity, inserted half-way up; a fine raised margin broadest laterad, 

 especially on poriferous and caudal segments. 



Below the carin;e the i)Osterior subsegments are finely and rather 

 faintly striate longitudinally, somewhat prominent some distance above 

 the insertion of the legs. 



Anterior subsegments smooth and shining, with faint, irregular, 

 impressed lines. 



Supplementary margin short, longitudinally finely striate, not pecti- 

 nate. 



Eepugiiatorial pores opening subdorsally in a large, deep, rounded 

 depression of the outer slope of an intramarginal ridge of segments 5, 

 7, 9, 10, 12, 13, 15, 16, 17, 18, 19. 



Preanal segment very short; anal segment very short, the apical 

 portion triangular, truncate at apex, and with four punctations there; 

 twelve other punctations, ten located as in PI. IV, fig. 6, and two others 

 lower down on the sides, below the level of the carina^ (PI. IV, fig. 7.) 



Anal valves with strongly elevated margins; two setigerous puncta- 

 tions, the superior marginal, the inferior submarginal. 



Preanal scale semielliptic, a broad, rounded, setigerous prominence 

 on each side of the middle, which is not pi oduced, but rather truncate. 



Sterna broad, and densely hirsute, except the first and last. 



Sternum of the fifth segment of male, with two large papilliform 

 hirsute processes between the second pair of legs. 



