84 EAST AFEICAX rOLYDESMOIDEA— COOK. vol. xvm. 



Sternum of segment 15 of male with a broad process. 



Male legii crassate and inferiorly tuberculate, the first six iiairs with 

 a fleshy sole at apex. 



Description. — Body very large, about five times as long as broad, cavity 

 scarcely depressed; oblong, abruptly narrowed at both ends. 



Vertex smooth, sulcus distinct, meeting a transverse inter-antennal 

 sulcus; post-antennal depression deep, the sense organ large. 



Labrum not emarginate, with three short, blunt teeth. 



Antenn;c filiform, joints in order of length 2, 4, 5, 3, 0, 1, 7. Seventh 

 joint broader than long, truncate, and with a conic depression in its 

 apical face; ten olfactory cones arranged in a circle around the edge of 

 the depression. 



Mandibulury stipe with exposed surface divided by sutures into five 

 areas, the basal larger than all the others together. 



Hypostoma strongly arcuate; rising from each side of the convex 

 median portion is a flattened, oblong process lying against depressions 

 of the lower part of the mentum. 



Oardo present, transversely oval. 



Mentum broadly triangular, long-pointed in front, very broadly 

 emarginate behind, hirsute. 



Stipes over twice as long as broad (2:5) hirsute. 



Lingual lamina? three times as long as broad, hirsute. Lingual lobes 

 large. Median lobe not evident. 



First segment three times as broad as long, with anterior and poste- 

 rior jnargins medianly straight and parallel; posterior margin laterally 

 curved forward; anterior corners broadly rounded, the posterior nearly 

 a right angle. The segment is much broader than the head, very 

 slightly narrower and noticeably longer than the second segment. 



Segments with dorsal surface smooth, neither granular nor areate. 



Lateral carina? subapproximate, about one-fourth as wide as the 

 body cavity, inserted about three-fourths of the distance up; margin 

 abruptly raised and thickened above, especially the lateral; edge 

 blunt, entire; carin.v of anterior segments curved slightly forward, the 

 X)osterior witb posterior corners more and more produced. 



Repugnatorial pores small, dorsal, located in a slight depression of tlie 

 middle of the thickened margins of the lateral carina? of segments 5, 

 7, 9-11), surrounded by a fine raised rim. 



Below the carina? the segments are finely rugulose, Avith a small 

 longitudinal carina above the insertion of the legs. 



Anterior subsegments smooth. 



Supplementary margin long, membranous, finely striate longitudi- 

 nally, not pectinate. 



Penultimate segment xevy short, included between the projecting 

 corners of the antepenultimate. 



Last segment very short, triangular, the apex narrow, truncate or 

 rounded, tlie whole segment bearing 10 seta^, as follows: Two pairs 

 lateral, two pairs marginal, two pairs dorsal; all these upon larger or 



