1919] Chambcrlin: Western Spiders 251 



Cornicularia monticolens sp. nov. 



Female — Caraj^ace dusky yellow to dusky chestnut, the lateral 

 margins solid black; eyes edged with black. Sternum more blackish 

 than carapace. Labimn and endites also dusky. Legs yellow, often 

 dusk\', with distal ends of coxse beneath often narrowly lined with black. 

 Abdomen blackish, without definite markings. Posterior row of eyes 

 straight or slightly recurved, the median eyes farther from each other 

 than from the laterals. Nearly twice their diameter apart. Anterior 

 row of eyes straight; median eyes much smaller than laterals, nearer 

 together, but well separated from the laterals. Area of median eyes 

 slightly wider than long. Clypeus moderately oblique, impressed 

 transversely below eyes, slightly higher than length of median eye area. 

 Epigynum as shown in Plate V, Fig. 4. 



Male — Anterior end of pars cephalica conspicuously elevated, 

 rounded, highest just back of anterior median eyes, bulging forward a 

 little over clypeus which is incurved above its lower edge. A long 

 auditory hair at distal end of tibia IV. In the palpus the tibial aphysis 

 is much more slender than in e. g. Cornicularis spiralis, the genotype, and 

 is slenderly uncate at tip. The embolus is strongly coiled in a flat 

 spiral, which is not in part covered as it is in spiralis, etc. See further, 

 Plate XVIII, Fig. 5. 



Length of female, 1.7 mm. Length of cephalothorax, .<7 mm. 

 Length of tib. + pat. I, .63 mm.; tib. + pat. IV, .7 mm. 



Type— M. C. Z. 444. Utah: Uintah Mts. ; Chalk Creek. 



This species x-in a group with the eastern C. spiralis Em. 

 and C. vigilax B., of Europe. It is strongly different from 

 those species in the form of the tibial apophysis of the male 

 and in the details of the eye relations, etc. 



Diplocephalus wamotsus sp. nov. 



Female — Carapace dusky yellow to dusky brown wath the frontal 

 gibbosity paler, often whitish, the sternum somewhat darker than 

 carapace. Legs yellow. Abdomen grey. Posterior row of eyes more 

 procurved than typical, but the tangent to anterior edges of its median 

 eyes intersecting the posterior portion of the laterals; median eyes 

 nearh" their radius apart, not quite twice as far frora the laterals. 

 Anterior row of eyes slightly procurved; the medians much smaller 

 than the laterals, sub-contiguous with each other, but widely separated 

 from the laterals. Clypeus about as wide as length of median ocular 

 area. Area of median eyes much longer than wide. Upper margin 

 of furrow of chelicera armed, with three well separated, long teeth; 

 the margin with a close-set series of several very small teeth. Ejjigynum 

 as shown in Plate XVIII, Fig. 7. 



Male — Post-ocular gibbosity broad, with each antero-lateral comer 

 extended as a rounded protuberance, its median region and a narrower 

 inter-ocular region in front of it rather densely pilose ; posterior median 

 eyes borne at base of its anterior face. Posterior row of eyes very 

 strongly procur\'ed; the medians separated by nearly their diameter, 



