234 PROCEEDINGS OF THE ACADEMY OF [May, 



median line. Legs brown, darker distally; beneath unmarked, but 

 having a number of dark cross-bars above on femora and posterior tibise. 

 Abdomen alcove dark, having the usual lanceolate mark at base, followed 

 by a series of light colored, chevron-formed transverse lines, each ending 

 on each side in a light dot; sides yellowish brown, densely spotted with 

 black; venter also yellowish brown, more sparse^ covered with smaller 

 black dots, much as in helluo. 



Length, 22 mm. Length of cephalothorax, 10.7 mm. ; width, 8 mm. 

 Length of leg I^', 30.3 mm. 



Male. — Colored nearly like the female, but paler throughout. Mar- 

 ginal stripes of cephalothorax not interrupted below by dark spots. 

 Legs clear brown, without any cross-marking on any joints. Palpi 

 yellowish brown excepting tarsus, which is black. 



Length, 20 mm. Length of cephalothorax, 10 mm.; width, 7.5 mm. 



Length of leg IV, 32.4 mm. 



Locality. — Kansas !. 



In general appearance the female resembles helluo, but is easily 

 separated by structure of epigynum and by various other characters. 

 The male is conspicuously different in its palpal organ and in size, 

 proportion and structure from those of related species. 



Lycosa riparia Hentz, 1844. 



(.J. Bost. Soc. N. H., IV, p. 289.) 

 Female. — Cephalothorax with a narrow median light band, widest at 

 dorsal groove, narrowing anteriorly and continuing as a distinct line 

 between eyes to the clypeus; median band formed of grayish-yellow 

 pubescence; tegument of cephalothorax elsewhere deep brown or 

 reddish brown, black over eye area, clothed with black pubescence, 

 intermixed with fewer yellowish or l^rownish-gray hairs which are more 

 abundant below but form no distinct band; rufous hairs about the 

 eyes and on the face. Chelicerce black with rufous pubescence over 

 upper half and black pubescence below. Labium and endites black, 

 brown at tips. Sternum and coxcb of legs beneath black with longer 

 and stiff black hairs and some short gray pubescence. Ground color 

 of tegument of legs dark reddish brown; the tarsi and metatarsi darker, 

 all joints except these two with distinct light and dark rings, the 

 latter being broader, clothed respectively with grayish-brown and 

 black pubescence, tarsi and metatai-si appearing entirely black because 

 of black scopulae and black pubescence, the shorter brown hairs being 

 few. Abdomen above grayish brown, with scattered minute spots of 

 black pubescence; a number of black chevron-marks behind and in 



