38 The Craspedosomatidse of North America. 



concave on the outside. This whole structure is probably articulated to a large 

 basal joint which bears a few spines along its lateral margin. 



2. An unpaired median, slender curved spine, bifid at the tip, the teeth 

 sharp-pointed, decurved and diverging. Proximally the sj^ine is thicker, some- 

 what compressed laterallj^, broader dorso-ventrally, and projects through the fis- 

 sure of the large lamina described above. Our drawing (fig. 2) might be 

 thought to indicate that this structure comes from one side, but this is not the 

 case. 



3. Caudad and laterad is on either side a slender, two-jointed, apically 

 bifid, styliform structure, curved cephalo-ventrad toward the apex. But one 

 of these is shown in our drawing (fig. 3, to the right). 



4. Between the enlarged basal joints of the ninth pair of legs is a subplane 

 deeply bifid lamina, the lobes of which are more or less deeply bifid with 

 divaricate subdivisions. Our drawing (plate I, fig. 6) is from a specimen 

 in which the inner edge of the primary lobe is merely emarginate. 



Ninth legs of male 4-jointed, the basal joint subequal in length to the 

 others taken together, and of twice the diameter; on the mesal face this joint 

 is deeply excavate near the base and again slightly above the middle, the sin- 

 uses separated by a large rounded knob, bearing on its upper side a conical 

 chitinized tubercle. Second joint slender, cylindrical, much longer than two 

 distal joints taken together, sometimes twice as long. Third joint about as- 

 long as broad; apical joint somewhat conic, exceeding the third in length. 

 Claw sometimes large and distinctly hooked, at others reduced to a shapeless 

 chitinous tubercle. 



Tenth legs of male with joints .34, .06, .54, .74, .26, .20 and .80 mm. long. 

 Distal inferior surface of coxa with a large slightly elevated cushion of small, 

 rounded knobs. Third joint with the inferior surface sparsely covered with 

 rounded knobs somewhat larger than those of the coxa. Fourth joint prox- 

 imally with a few knobs similar to those of the third joint. Seventh joint 

 and secondary claws as given for third legs. The secondary claws of thi& 

 species are situated farther distad on main claw than those described in the 

 species of other genera. 



Eleventh leg with joints .46, .08, .56, .70, .26, .18 and .78 mm. in length;, 

 width of first joint .30 mm. The first joint with a cone .12 mm. long and .08 

 mm. wide about the middle of the inferior surface; just distad of this a convex 

 area covered with small, rounded knobs, as is also the inferior surface of the 

 third joint. Seventh joint as in the preceding. Two superior secondary 

 claws. 



Color, according to Cope, varying from nearly white to a pale red. We 

 have seen only alcoholic sj)ecimens and these vary fi'om a dirty white to pale 

 horn-color. 



Length of mature specimens 18 mm. ; width 1.5 mm. 



Habitat: Southern Yirginia, first collected by Dr. E. D. Cope 

 in Erhart's Cave, Montgomery Co., and in Spruce Run and Big 

 Stony Creek Caves, Giles Co.; Tennessee, Lost Creek Cave^ 

 Granger Co., also Nickajack Cave (Dr. Cope); Indiana, Wyan- 



