674 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxi. 



irregular rows of larger, rougher, grauules are iu the spaces between 

 the dorsal carina3. The whole surface of the segments and carinfe is 

 finely grauular-roughened, so as not to appear smooth and shining. 

 The dorsal median carina decreases gradually caudad. Tbe carinte are 

 very abrupt elevations, and differ very strikingly from those of Lysio- 

 petalum, not having the appearance of tbe edges of grooves as in that 

 genus. The anterior granule between the dorsal carina^ is slightly 

 larger than the others, and is tipped with a larger, though small, seta, 

 very small setre being sometimes discernible on other granules. On 

 the first segment and on tbe posterior segments the granules are 

 larger, very rough and wart-like. On the posterior segments the 

 carina^ are closer together and slightly larger. 



Penultimate and antepenultimate segments yellow, without the ven- 

 tral carina, like the first. Penultimate segment footless. 



Last segment anteriorly somewhat constricted, very rough and gran- 

 ular, posteriorly broadly and bluntly, though deeply, tridentate; on 

 tbe sides moderatel}" sinuate, with no trace of carina. 



Anal valves very flat, slightly convex iu the middle, very rough with 

 granules. 



Preanal scale semicircular, convex, very rougb, with two long hairs. 



STRIARIA COLUMBIANA, new species. 

 (Plates LIII, fig. 3a; LIV, figs, la-lm.) 



Type Ko. 775, U.S.N.M. 



Locality. — Washington, D. C. 



Length, 10 mm.; widtb, 1 mm. 



Differs notably from the preceding in tbe much smaller carinse, the 

 more shallow incisions of tbe terminal segment, the larger jirocesses 

 of the coxa of the third pair of legs, tbe longer ventral lobe of the 

 fourth segment. 



Color born-brown, dark above, usually lighter between the three 

 lateral carina, which gives tbe appearance of a yellow lateral line; 

 below this line darker, then ligbter. Ventral parts and tbree basal 

 joints of legs dirty white, the apical darker. Last three segments yel- 

 lowish or whitish, abruptly differing from tbe others; sometimes, how- 

 ever, the last segment is brownish. Antenna nsually colored like tbe 

 legs. A fine pale median line is usually apparent, as well as a light 

 transverse band near tbe suture between the subsegments. Near the 

 posterior margin of each segment is a finer dark line sinuate at the 

 carina, and running back upon each, thus giving tbe appearance of a 

 series of arches. 



The second and third of the dorsal carina, counting from side, are 

 farther ai^art than tbe others, while tbe first and second are nearest 

 together; tbe first is also more or less curved. Between each pair of 

 carina, that is, in every second space, is a small setiferous tubercle 



