Tlie Graspedosomatidde of North America. tS 



tween the bristle-bearing j)rotuberances is scarcely elevated, and the bristles 

 are nearly in a traverse line. 



Penultimate segment almost covered by the preceding; bristles in a 

 straight row; posterior margin very finely serrate, as is also that of the pre- 

 ceding segments, bnt to a less degree. 



Anal segment truncate posteriorly, slightly emarginate in the middle, lat- 

 erally broadly sinuate. There are eight bristles, two close to the median line, 

 near the middle of the segment, the others close to the posterior margin; at 

 the emargination, one on each side of the median line, a pair of very slender 

 bristles with large conic bases as long as the anterior pair of bristles; one bris- 

 tle at each angle of the truncation ; below these a third pair in the upper part 

 of the sinuation. All the bristles of this segment are more slender than those 

 of the preceding segments. 



Anal A'alves subequal to the anal segment, above with a blunt angle, con- 

 vex ; a slight ridge near the somewhat faintly raised margins bears three slen- 

 der bristles at equal distances from each other; the suj)erior bristle is much 

 closer to the anal segment than the inferior one is to the preanal scale. 



Preanal scale semicircular, faintly truncate or media nly emarginate, bear- 

 ing on each side, not far from the median lineasetigerous tubercle; the bristles 

 very slender, nearly twice as long as those of the anal Aalves, directed poster- 

 iorly and upward, lying close to the anal valves. 



First pair of legs of male small, six-jointed, the Joints beyond the coxae 

 measuring respectively .08, .34, .18, .12, and .42 mm., third and fourth joints 

 widest, . 12 mm. ; no roughenings or protuberances ; claw large, with two 

 large secondary claws on the superior edge. 



Second pair of legs of male also six-jointed, larger than first pair, measure- 

 ments of corresponding joints, .10, .40, .18, .12 and .44 mm.; second joint 

 thickest, .14 mm., not including a large rounded protuberance near the mid- 

 dle of the inferior surface of the joint. The diameter of this protuberance is 

 about half that of the joint, and its surface is covered with transparent chitin- 

 ous cones of various sizes. Claw as for the first legs. 



Third pair of legs of male seven-jointed, lengths of joints, from coxa, .20, 

 .04, .34, .46, .16, .12, .48 mm.; width of third joint .22 mm. The inferior 

 surface of the distal half of the seventh joint is covered with hook-like, trans- 

 parent processes arranged in longitudinal rows. ClaAV without evident second- 

 ary claws. 



Fourth pair of legs of male with joints measuring .20, .04, .34, .54, .20, .14 

 and .46 mm., width of third and fourth joints .24 mm. About one- 

 third of the distance from the distal end of the fourth joint a large subclavate 

 protuberance about as broad as long, the surface covered with cones like the 

 protuberance of the second leg. The seventh joint is roughened like that of 

 the third leg. No secondary claws. 



Fifth legs of male; joints .14, .04, .40, .52, .18, .14 and .54 mm., third joint 

 .24 mm. wide. A large protuberance similar to that of the fourth legs. No 

 secondary claws. 



Sixth legs same as fifth in proportion of joints, etc. Third joint similar to 

 second joint of second leg. 



