1908.] NATURAL SCIENCES OF PHILADELPHIA. 285 



and shows the same tendency toward excessive reduction of the spines 

 of the anterior legs, these spines in some species of Tricca being entirely 

 absent from the tibiae (cf. degesta, infra). In Tricca the anterior row 

 of eyes is always more or less recurved, while in Allocosa it is at most 

 straight. This difference may prove not to hold good. It may 

 become impossible ultimately to maintain this group separate from 

 Lycosa, the American species of which it closely approaches through 

 the Trochosa group. 



Key to Species of Allocosa. 



1. All joints of legs except femora clear yellow, without any darker 



annulations or marldngs except at ends of tibiee IV, 

 T 1 T ^ rugosa (Keys.). 



J.egs beyond femora more or less distinctly annulate with dark, 2. 



2. Anterior row of eyes longer than the second; anterior median eyes 



not more than one-fifth their diameter apart; anterior tibise 

 armed neither in front nor behind, and the ventral spines minute, 

 . degesta Chamb. 



Anterior row of eyes shorter than the second; anterior median 

 eyes their radius or nearly so apart; anterior tibiae armed in 

 front and behind and the ventral spines longer, .... 3. 



3. Femora of first legs solid black above, a sub-basal brown band on 



the others, fimerea (Hentz) 



Femora of first legs not solid black, marked" with three black 

 rings, 4 



4. First pair of ventral spines of anterior tibiaj reaching the bases of the 



median pair, the basal spines in length equalling the diameter of 

 the joint; upper margin of furrow of chelicera with three teeth, 



^. . -parva (Bks.). 



l*irst pair_ of ventral spines of anterior tibia? not reaching bases 

 of median pair; and none of the spines in length equalling the 

 diameter of the joint; upper margin of furrow of chelicera with 

 two teeth, evagata, sp. n. 



Allocosa rugosa (Keyserling), 1876. 



(Verb. z. b. Ges. Wien, 26, p. 624, PI. 7, figs. 9, 10.) 

 Female.— Cephalothorax shining black with obscure brown lines 

 radiating from above; sometimes with a brownish luster; clypeus a 

 little paler, brownish. Chelicerce black. Labium, endites and coxce 

 of legs beneath brown. Sternum brownish black. Legs with all 

 femora black, all other joints yellow or pale brown, except the posterior 

 tibiae which have a dark ring at each end. Abdomen ^\\i\\ front 

 declivity and the sides blackish with some minute lighter dots; dorsum 

 obscure brown, black hues outlining a lanceolate mark at base which is 

 continued behind as a fine black median line with a row of black dots 

 19 



