^ht €mmytmi €xtixtxxtxtlit^hi 



Vol. LII. LONDON. SEPTEMBER, 1920. No. 7 



NEW SPIDERS FROM UTAH. 



BY RALPH V. CHAMBERLIN, 

 Cambridge, Mass. 



Drassid^. 

 Zelotes fratris, sp. nov. 



Male. — A species suggesting Z. ater in general appearance and structure- 

 Cephalothorax, abdomen and legs black, the tarsi of the latter paler. Posterior 

 row of eyes straight, the eyes nearly equal and equidistant, thus clearly con- 

 trasting with ater, in which the median eyes are larger and much more approxi- 

 mate to each other than to the laterals. Anterior row of eyes procurved as 

 usual; the medians much smaller than the laterals, being about half the diameter 

 of the latter, more than, their diameter from each other, but very close to the 

 laterals. Area of median eyes as wide in front as, or scarcely wider than, behind. 

 Anterior tibice wholly unspined, not armed at distal end as in ater. Anterior 

 metatarsi with a pair of spines at base. Palpus with apophysis suggesting 

 that of ater, the bulb, however, differing decidedly in details and much more 

 similar to that of tuobus. See fig. 18, 1 and 2. 



Length 6.3 mm. Length of cephalothorax 2.8 mm. Length of tib. + pat. 

 I, 2.6 mm.; of tib. + pat. IV 2.8 mm. 



Locality. — Utah: Logan Canyon. Collected by my brother, Seth C. 

 Chamberlin. 



Aside from difference in the palpal organs which are represented in the 

 figures, this form differs fom the male paratype of tuobus in having the tib.+ 

 pat. I\" of the same length as the cephalothorax instead of much longer. Jn 

 the male paratype of tuobus the cephalothorax is 3 mm. long, while the tib.+ 

 pat. W measured 3.7 mm. 



Zelotes lampra, sp. nov. 



Female. — Cephalothorax shining black. Legs black, with all tarsi and the 

 metatarsi of the first three pairs in the type paler. Abdomen black both above 

 and below. Anterior row of eyes procurved in such degree that the tangent 

 to the lower edge of the medians passes through or very near the centres of the 

 laterals. Median eyes much smaller than the laterals, about their diameter 

 apart, much closer to the laterals. Posterior row of eyes straight; median eyes 

 larger than the laterals, scarcely their radius apart, an equal distance from 

 the laterals. Quadrangle of median eyes wider behind than in front, a little 

 longer than wide. Tibia I + 11 armed beneath near middle (or possibly a pair 

 of spines). Metatarsi I and II each with a pair of subbasal spines beneath. 

 Distinguished readily by the form of the epigynum, which is represented in 

 fig. 19,3. 



Length 5 mm. Length of cephalothorax 2 mm. Length of tib. + pat. I 

 2 mm.; of tib. + pat. I\' 2.36 mm. 



Locality.— \]id\i: Salt Lake Co., Mill Creek. 



193 



