300 PROCEEDINGS OF THE ACADEMY OF [May, 



1S90. Pirata Marx, Proc. U. S. N. M., 12, p. 564. 



1898. Lycosa Simon (ad. part), Hist. Nat. Araign., 2, p. 345. 



1902. Pirata Montg., Proc. Acad. Nat. Sci. Phila., p. 536. 



1903. Lycosa Comstock (ad. part.), Class. N. A. Spiders, p. 51. 



1904. Pirata Chamberlin, Can. Ent., p. 177. 



1904. Aulonia, Montgomery, Proc. Acad. Nat. Sci. Phila., p. 265. 



Cephalothorax moderately low; the pars cephalicanot elevated being 

 nearly level with the dorsal line of the pars thoracica, in front broadly 

 obtusely rounded, the sides rounded and considerably sloping. Face 

 mostly low, much shorter than the length of the chelicerse, trapeziform, 

 the sides in most convexly rounded and widely sloping, rarely sub- 

 straight and very steep or nearly vertical, the eyes of second row more 

 or less distant from its upper exterior angles. Except in the few 

 species with the sides of the face very steep, the posterior eyes when 

 viewed from above are removed from the lateral margins of the pars 

 cephalica by more than their diameter as is the case in Lycosa 

 {PI. X, fig. 5). Quadrangle of posterior eyes one-fourth, or usually 

 less, the length of the cephalothorax, rarely longer. Chelicene robust, 

 the lower margin with three teeth similar to those of Lycosa, but with 

 the third often conspicuouslj^ reduced as in Pardosa; upper margin 

 with three teeth of the usual character ; fringe of hair of upper margin 

 more sparse than in Lycosa; posterior line with long but sparse hairs. 

 Legs robust; tarsi in most cases simply setose on all pairs, very rarely 

 with the anterior ones with thin lateral scopular lines as in Pardosa, 

 the bristles, however, being often serried (PL X, fig. 7); tibia -1- 

 patella of leg IV sometimes longer than, at others shorter than, the 

 cephalothorax, longer than the metatarsus or more rarely of the same 

 length. The cephalothorax always presents a median pale stripe, 

 which begins on the posterior declivity as a narrow line and then con- 

 tinuously widens to the third eye row, there more abruptly widening, 

 passing below the posterior eyes of each side and attaining the clypeus ; 

 the eyes are mostly upon black; the median stripe encloses in its anterior 

 half a bifurcate or V-shaped dark mark, the undivided median part 

 being at the anterior end of the dorsal furrow and sending an arm 

 forward to the inner margin of the third eye on each side (PI. X, 

 fig. 5) ; marginal light stripes may or may not be present; many species 

 are marked on the abdomen with lines and spots of bright white hair. 



The Piratas are spiders of small or of medium size. The males are in 

 most cases as large as or larger than the females. 



In habits they are much like the Pisauricke. They occur in damp 

 meadows or more especially at the margins of streams, ponds and 

 other bodies of water, upon which they run with great ease. Many 



