1919] Chamherlin: Western Spiders 255 



light line on each side, the folium back of middle solid black and at its 

 anterior end embracing a short median longitudinal stripe, which widens 

 caudad; venter with a broad black stripe behind epigynum in each 

 lateral edge of which is a yellowish spot; sides marked by fine longi- 

 tudinal black lines or streaks. Thoracic furrow long, longitudinal, 

 with no transverse impressions. The first coxa has a stout hook at 

 distal end, while the second coxa is armed at base with a longer, stout, 

 conical and nearly straight process. The tibia of leg II is enlarged with 

 itsmesal (anterior) surface convex; it is armed beneath with a double 

 series of long stout spines, the posterior series in the type consisting of 

 six spines and the anterior of three; the mesal or anterior surface in 

 addition is armed with numerous spines in two or partially in three series, 

 most of these spines being distad of the middle and these being much 

 shorter and stouter than the others, about seventeen spines in all on 

 the anterior surface. Palpus of male of characteristic form See 

 Plate XIX, Fig. 3. 



Length, 8 mm. Length of cephalothorax, 4.2 mm. Length of 

 tib. + pat. I, 5 mm.; of tib. + pat. IV, 4.2 mm. 



Type— M. C. Z. 461. Utah: Chalk Creek. 



CLUBIONID/E. 



Clubiona orinoma sp. nov. 



Female — Carapace dull yellow of slightly brownish cast. Sternum 

 and legs light yellow. Labium and endites brown. Chelicera light 

 chestnut. Abdomen beneath light yellowish grey; dorsum reddist 

 brown over a yellow ground with a narrow median longitudinal reddish 

 line from base to behind middle, this pointed- at caudal end; sometimes 

 fine pale chevron lines traceable on posterior region. Lower margin 

 of furrow of chelicera armed with two moderately stout teeth with 

 sometimes distad of these a number of granular elevations. Anterior 

 row of eyes straight; eyes less than their radius from lower margin of 

 clypeus, equidistant, nearly their diameter apart. Posterior row of 

 eyes much longer than the anterior with eyes smaller; row straight; 

 median eyes two and a half times their diameter apart, twice their 

 diameter from the laterals. Area of median eyes much wider than 

 long, wider behind than in front in about the ratio 22:15. Tibia I and 

 II armed beneath with two pairs of spines, the corresponding metatarsi 

 each with a single basal pair. Epigynum as shown in Plate XIX, Fig. 4. 



Length, 6.5 mm. Length of cephalothorax, 2.6 mm. Length of 

 tib. + pat. I, 2.2 mm.; of tib. + pat. IV, 2.2 mm. 



Type— M. C. Z. 474. Utah: Chalk Creek. 



