134 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 106 



mal on the outer curvature. Galeal seta nude. Setae appear 

 strong but frequently are broken off. Basal segment of chelicera 

 heavy; blade large, curved, subapical dorsal and ventral teeth 

 distinct. Punctae on palpal coxa and on cheliceral base. 



Legs: Leg I with two long, slender genualae and a micro- 

 genuala ; two diagonally placed tibialae, the more distal one longer 

 with typical microtibiala posterior to it; spur with microspur 

 half length of spur or less distal, or distal and posterior; sub- 

 terminala, parasubterminala, and pretarsala typically placed, 

 long and strong. Leg II with one typical genuala, two tandem 

 tibialae, a spur with proximal microspur, and a pretarsala. Leg 

 III with single, slender genuala and tibiala. Leg segments ro- 

 bust, all with rather small punctae. Empodia more slender than 

 the claws but about the same length. Feathered setae on the 

 more proximal, free segments with rather long, curved setules; 

 setules on feathered setae of tarsi generally straighter. 



Scutum: Shape somewhat variable as lateral areas are ex- 

 tended more or less anteriorly. About twice as wide as long. An- 

 terior margin generally concave with a convexity anterior to 

 anterior median seta. Lateral margins concave, diverging pos- 

 teriorly. Posterior margin extends more or less posteriorly, 

 slightly concave behind the posterolaterals, convex posterior to 

 the pseudostigmata, and usually slightly concave between them. 

 The four corners somewhat extended. Setae long and heavy; 

 anteromedian shortest, set close to anterior margin; postero- 

 laterals exceptionally long; setules strong but rather widely 

 spaced. Pseudostigmata well behind a line drawn between the 

 posterolaterals. Sensillae broadly clavate; head well covered 

 with long setules on the anterior surface, fewer on posterior sur- 

 face; pedicels distinct. Surface covered with punctae; usually, a 

 pair of larger pits medial to posterolaterals. 



Standard data of the paratype from Stone County, Mo.: 



Summarj^ of standard data from 14 specimens from over the 

 range, including the paratype (AL's from 12 specimens, AM's 

 from 11, PL's from 13, S's from 6) : 



AW 60-80, mean 67.6; PW 76-103, mean 85.4; AP 16-25, mean 

 20.4; SB 22-37, mean 30.3; ASB 29-40, mean 34.4; PSB 8-13, mean 

 10.8; AL 44-70, mean 55.2; AM 36-50, mean 44.9; PL 104-126, 

 mean 114; S 32-44, mean 39.2; width of sensilla 11-16, mean 13.7 



Eyes : Usually not distinguished ; one pair posterolateral to the 

 posterolateral setae. Diameter about 6. 

 Dorsal setae: Long, curved; nude adjacent to body; long frag- 



