56 PEIODESMUS, A NEW DIPLOPOD FROM SURIXAM—COOK. vol. xvni. 



length. The whole surface of the segments is thickly granular, except 

 the apices of the marginal teeth and the large granules, which are 

 smooth and shining; anterior margin of carina raised on anterior 

 segments. 



Fourth and subsequent segments to the eighteenth with a transverse 

 furrow, very indistinct on the fourth and eighteenth; on some of the 

 segments the transverse furrow divides, the branches turning to the 

 anterior and posterior margins. 



Repuguatorial pores located near the middle of an oval smooth area 

 which faces obliquely upward, laterad and cephalad: pore immediately 

 surrounded by a very minute rim. 



Lateral carinie coarsely dentate as above, and with a fine raised ante- 

 rior margin. 



On posterior segments, the whole carina is more curved caudad and 

 produced. Last segment with finer granules than the preceding. 



Anal valves finely grauular-rugulose. Preanal scale with surface 

 evenly convex and with scattering granules. 



Legs moderately pilose, the surface scarcely granular. The promi- 

 nence of the ventral face of the male legs is somewhat more densely 

 j)ilose. The process of the coxa of the second male legs is smooth and 

 shining, but with a long bristle at apex. 



Male genitalia with apex of larger branch deeply bidentate; the 

 smaller tooth simple, pointed; the larger flattened at right angles to 

 the smaller, and with several small teeth. 



Color dull reddish-brown, rather dark; legs and antennie lighter, 

 tending to yellowish; ventral surface and basal joints of legs sordid 

 brownish. 



Length, about 27 mm. (the specimen was broken); width, 3 mm. 



Locality. — One male specimen in the National Museum collection^ 

 obtained in Surinam, May, LS93 (Beyer). 



PRIODESMUS PAR/E, new species. 



The species differs from P. (tens, as here described and figured (PI. 

 I, figs. 1-19), in the following details: 



Dorsum distinctly, tliough not strongly, convex. 



Vertex densely granular-rugulose. 



Antenna^ somewhat more slender. 



First segment distinctly narrower and slightly longer than in P. aciis; 

 the posterier corners not prominent and spiniform as in that species. 



Dorsal surface about as densely granular as in the figure of P. aciis; 

 the large granules of the anterior and posterior rows more distinct, 

 those of the other rows less so. Anterior raised margin not evident. 



Subsequent segments somewhat more densely granular, ns above; 

 the anterior and posterior rows of large granules larger, the middle 

 inconspicuous. 



