1919] Chamberlin: Western Spiders 253 



Wubana retrahens sp. nov. 



Male — Cephalothorax and legs dull fulvous. Eyes edged with 

 black. Abdomen greyish; marked above as in W. drassoides with a 

 median longitudinal black line at base followed behind by several 

 transverse dark lines; sides and part of venter dusky. Eyes of anterior 

 row equidistant, the medians a little smaller than the laterals. Posterior 

 row of eyes gently procurved; medians scarcely their diameter apart, 

 nearer to the laterals. Area of median eyes longer than wide. Pili- 

 gerous stripe extending from caudal end of pars cephalica forward 

 between eyes, with no special process of elevation behind eyes beneath 

 the brush of longer hairs. Palpus as shown in Plate XVIII, Fig. 10. 



Length near 2 mm. 



Type— M. C. Z. 447. Utah: Fillmore. 



The male is at once distinguishable from those of W. 

 drassoides and W. pacifica in lacking the postocular piligerous 

 eminence. It is notably different from W. drassoides in having 

 the posterior median eyes much closer together, with the area 

 of median eyes longer than wide instead of wider than long. 

 The structure of the male palpal organ is also a feature readily 

 distinguishing the species. 



Hilaira uta sp. nov. 



Female — Carapace, sternum and endites dusky over a light brown 

 ground, less often yellowish, the labium and chelicerag darker. Legs 

 dusky light brown to yellow. Abdomen grey, more or less dusky, with 

 no markings. Posterior row of eyes straight ; median eyes their diameter 

 apart, once and a half as far from the laterals. Anterior row of eyes 

 substraight, being very slightly recurved; medians smaller than the 

 laterals, less than their radius apart, their diameter from the laterals. 

 Area of median eyes subequal in length and breadth or slightly longer 

 (11:10), narrower in front than behind in about ratio 9:10. Clypeus 

 in height equal to length of median eye area. Epigvnum as shown 

 in Plate XVIII, Fig. 9. 



Male — The palpal organ is distinctive. The spinulose submedian 

 lobe, or apophysis, of the bulb is a notable feature. See Plate XVIII, 

 Fig. 8. 



Length of female, 3.8 mm. Length of cephalothorax, 1.8 mm.; 

 width, 1.3 mm. Length of tibia + patella I, 1.4 mm. ; of tibia + patella 

 IV, 1.7 mm. Length of male, 2.8 mm.; of cephalothorax, 1.4 mm. 



Type— M. C. Z. 448. Utah: Millard Co. ; Clear Lake. 

 This species is readily recognizable by the form of the epi- 

 gynum in the female and of the palpal organ in the male. 



