The Graspedosomatidee of North Amei'ica 81 



from the posterior corner; second tubercle about midway between the first 

 and third ; the third rather close to the median line. Tubercles very small, 

 located in very slight depressions; the setae slender and if horizontal would 

 nearly reach the posterior margin of the segment. 



Surface of all the segments apparently smooth and shining, but if suffi- 

 ciently magnified it appears finely reticulate-areolate, the areas being irregu- 

 larly hexagonal or quadrate. On the anterior subsegments the areolation is 

 somewhat coarser and more regular, consisting of rectangles in transverse 

 rows. On the sides of the segments and below the longitudinal lines of the 

 reticulations become more distinct giving the appearance of longitudinal stria- 

 tious. The usual fine median line distinct. 



CarinsB very fine, linear, striaeform, oblique, the anterior end being higher; 

 the carinse gradually decrease in size from the first segment and disappear 

 about the tenth. Below, near to and parallel with the ventral edge of the 

 segments is a fine furrow, more evident on posterior segments. 



Setigerous tubercles and setse also decreasing in size from the first segment, 

 almost disappearing on the middle segments. On posterior segments the 

 tubercles and setse increase in size, extending beyond the posterior margins of 

 their segments. 



Posterior segments not much shorter than the anterior. 



Anal segment without median line; broadly truncate; the dorsal pair of 

 tubercles very small and close together, located in a very slight transverse 

 furrow, the seta not reaching the posterior margin of the segment. The conic 

 processes of the posterior margin as long as the distance from their bases to the 

 anterior pair of tubercles; from their apices extend very slender hairs (fre- 

 quently broken off) equalling in length the conic bases. The next pair of 

 marginal setae located near the corners of the truncation, and as long as the 

 conic processes. 



Anal valves smooth or with faint vertical wrinkles; three setigerous tuber- 

 cles somewhat removed from the slightly compressed margin. 



Preanal scale semicircular, broadly emarginate; two tubercles and slender 

 setae. 



Pedigerous laminae plain in front, reticulate-areolate, mucronate between 

 the bases of the legs. 



Legs of both sexes rather robust. 



First legs of male (fig. 180) six-jointed, rather robust; basal joint with apex 

 hirsute with fine hairs; second joint broader than long; last joint with a comb 

 of coarser hairs along the ventral side; claw large; two supplementary claws. 



Second legs of male (fig. 181) six-jointed, strongly crassate ; basal joint pro- 

 duced into a long chitinous hook; second joint very small; joints 3-6 very 

 stout and hirsute with fine fiexuous hairs; last joint densely clothed with long 

 flexuous hairs, especially long at apex, and far exceeding the very small claw. 



Third legs of male (fig. 182) seven-jointed; basal joint produced into 

 rounded processes with a tuft of flexuous hairs at apex; second joint very 

 small, concealed (in the drawing) behind the first and third joints; third joint 



Annals N. Y. Acad. Sci., IX, Nov., 1895—6 



