Pomona College, Claremont, California 9 



anterior femora armed beneath with a double series of numerous stout spines, and the 

 abdomen broadly triangular-oval in outline {Neoscona in part.) In coloration it 

 differs from .-I. utahana Chamb., e. K-. in having the anterior tibia: and metatarsi only 

 biannulate instead of triannulate, the median annulus being absent, while the femora 

 have an annulus only at the distal end. In the type the carapace is somewhat dark- 

 ened in a median longitudinal stripe and may have been blackish in life. Thorax 

 blackish at sides. Abdomen in general light yellowish; on posterior portion above a 

 black line with posterior end bifurcating, and a black line on each side also running 

 caudad from anterior end of the median line; on sides a series of brownish, parallel, 

 subvertical lines; venter not unusually black as it is in ulaliana. The scape of the 

 epigynum instead of curving evenly with convexity ventrad, is straight to the distal 

 end which is bent abruptly ventrad instead of curving dorsad as in vertehrata. This 

 bending may in part be an artifact as the abdomen in the type was shrunken firmly 

 against the end of the scape. See pi. 6, f. 6. 



Length, 14 mm. Length of abdomen, 11.5 mm.; width, 9.6 mm. Length of 

 cephalothorax, 6.6 mm. Length of tib. -f- pat. L "■- min.; of tib. -}- pat. IV, 6.5 mm. 



Type— M. C. Z. 388. Cal.: Desert region. 



THOMISID,^ 

 Thanalus retentus sp. nov. 



Female — Carapace with a chocolate colored band on each side above a pale 

 marginal stripe, with a broad median dorsal pale stripe embracing typically a darker 

 median longitudinal mark which bifurcates at the posterior border of head and is 

 continued forward as interrupted dark lines, a median dark line also present betweeen 

 these branches. Lower median region of clypeus pale. Sternum yellow, densely dotted 

 over borders, or sometimes over entire surface, with minute dark spots. Legs brown, 

 lined and mottled with black, the joints showing some clearer longitudinal lines par- 

 ticularly on the femora. Abdomen above yellowish with a dark colored basal sagittate 

 mark reaching to middle or indistinctly continued bej'ond in an interrupted median 

 line; on posterior region a dark area showing several chevron marks united on each 

 side in a line or band with wavy exterior edge; typically the venter shows two 

 narrowly separated median black lines united in an acute angle in front of spinnerets 

 and ectad of this on each side another dark line. Posterior row of eyes strongly 

 recurved, as usual, the median eyes scarcely nearer to each other than to the laterals 

 (cir. 14:15). Area of median eyes narrower in front than behind, longer than wide 

 in about ratio 2il:17. Anterior medians twice as far from each other as from the 

 laterals. Epigynum as shown in pi. 6, f. 5. 



Type— M. C. Z. 389. 



Claremont. A common species in this region. 



This form is readily distinguishable from eolor/iih-niis, with which it has hereto- 

 fore been confused, by the obviously different form of the epigynum. 



AGELENTD.?^ 

 Agelena rua sp. nov. 

 Male — Carapace with the sides dark, as usual, the median band yellow. Sternum 

 dusky over yellow with a clear median longitudinal line. Legs light yellow, obscurely 



