254 Annals Entomological Society of America [Vol. XII, 



ARGIOPID^. 



Aranea (Neoscona) utahana sp. no v. 



Female — This species belongs with vertebrata McCook in the group 

 with longitudinal thoracic groove and having the anterior femora 

 armed beneath with a double series of niimerous stout spines. It 

 differs from other forms of this group conspicuously in the form of the 

 abdomen, which is rather broadly triangular-oval instead of elongate 

 oval. The carapace grey of slightly yellowish cast marked with a con- 

 spicuous median longitudinal black band with lower border of pars 

 cephalica also black followed on pars thoracica by one or more obscure 

 dark spots. Sternum yellowish grey in the middle borders black. 

 Abdomen grey with a folium on the posterior half limited on each side 

 by a wavy black line edged with a pale line ; just within the limiting line 

 of folium on each side is a straight dusky line, while on the median 

 region are two longitudinal dark lines close together; on each side of 

 folium are numerous dark lines running from its edge ventrad; each 

 anterolateral corner dark, the dark area crossed by fine vertical pale 

 lines; midventral region black, the stripe embracing at each border two 

 white spots, of which the anterior is the larger. Legs light yellow, 

 deeply banded with black. The femur of anterior legs with a black 

 submedian annulus and a broader distal one; the patella black, obscurely 

 divided by a pale median area; the tibia with a black annulus at each 

 end and one at the middle; and the metatarsus similarly triannulate. 

 The tibiae of legs III and IV lack the median black annulus as does 

 metatarsus III, while it is present on metatarsus IV. Hairs of body 

 in general whitish. The scape of the epigynum is in general similar 

 to that of vertebrata, but is evenly curved, not at all geniculate. See 

 Plate XIX, Figs. 1 and 2. , • 



Length, 12 mm. Length of abdomen, 8.5 mm.; width across base, 

 "8.2 mm. Length of cephalothorax, 5.2 mm. Length of tib. + pat. I, 

 7 mm.; of tib. + pat. IV, G mm. 



Type— M. C. Z. 458. Utah: Fillmore. Webs found in 

 sagebrush on desert flats west of the town. The color of the 

 spiders blends with the olive grey of the sage-brush. 



Aranea tusigia sp. nov. 



Male — Carapace light brown above, the lower part of sides blackish 

 brown with upper border of stripe serrate, a narrow marginal light stripe 

 below dark area on each side. Sternum black. Legs yellow, marked 

 with dark annuli; on femora a narrow annulus at base, a second broader 

 one distad of middle and a third one toward distal end, the extreme distal 

 end being of a reddish yellow cast. Tibiae black at proximal end, at 

 least above, and in a much broader annulus at distal end; metatarsi 

 also dark at both ends, more narrowly so at the proximal one; tarsi 

 darkened distally. Abdomen with folium above limited by a sinuous 



