•138 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 104 



broken off the nonspecialized setae. Leg segments stout, rounded 

 in legs I and II; all segments with punctae. Empodium about 

 the same length as the claws. 



Scutum: About twice as wide as long, slightly pointed at the 

 posterolateral corners. Anterior margin straight with antero- 

 lateral corners extended and a small convexity anterior to the 

 anteromedian seta. Lateral margins concave, diverging pos- 

 teriorly. Posterior margin convex posterior to each pseudostigma 

 and shallowly concave medially. Anterolateral and posterolateral 

 setae set on extended corners. Anteromedian seta close to anterior 

 margin. Posterolaterals longest; anteromedian shortest. Fine 

 setules on all setae. Pseudostigmata rather widely separated, 

 posterior to a line drawn between the posterolaterals. Sensillae 

 broadly clavate, widest about three-fourths the length from the 

 base; pedicel rather long and distinct; expanded portion covered 

 with setules, fewer on posterior surface. Crescentic ridges indi- 

 cated anterior to pseudostigmata. Surface punctate; in these 

 specimens wide margins surround the punctae. 



Standard data for the five specimens of the type series from 

 Benton County, Oreg. : 



AW PW AP SB ASB PSB AL AM PL S 



Eyes: Two pairs, distinct but rather small; anterior and pos- 

 terior eyes about the same diameter, 7. 



Dorsal setae : Setae with rather fine setules of moderate length 

 except the posterior group. Posteriors with fewer, shorter set- 

 ules ; end bluntly or with V-clef ts. Measurements from five speci- 

 mens : Length of humerals, 48 to 52 ; of setae near the middle of 

 the first posthumeral row, 43 or 44; of setae in the posterior 

 group, 43 to 45. 



Dorsal formulae for five specimens of the type series from 

 Benton County, Oreg.: 



Ventral setae : General character similar to that of the dorsals. 

 Data from five specimens : Number of first sternals, 2 ; of second 



