Zool.— Vol. I.] BANKS— MEXICAN ARACHNIDA. 259 



the median line to the point where the abdomen overlaps the cephalothorax, 

 a narrow white band connects the A. S. E. and passes between the four M. E. ; 

 mandibles dark red-brown, a small white line on their outer tip; sternum 

 dark brown, with some pale spots; coxa; pale, with a median line and some 

 spots brown; femora and patellae of anterior pairs black, usually showing a 

 narrow white line beneath and spots above at tips, rest of these legs pale yel- 

 lowish, with the tibiae infuscated at base; posterior legs mottled, the femora 

 with a white line below, the tibia; and patellae with one above. Abdomen 

 white above, with an oblique brown mark each side at base, behind are three 

 pairs of transverse spots more or less connected, various small dark dots, 

 sometimes some of them indicate a narrow basal spear-mark; venter mottled, 

 darkest at base. A. M. E. equal to P. M . E., a little nearer to A. S.E. than 

 to each other. Four pairs of spines under tibiae and metatarsi I and II. The 

 tibia of the £ palpus has a large projection on the inner side, the tarsus is 

 broad, the style extends around, and on the outer side at base is a projection 

 outward for the tip of the style, in the middle of the bulb are two teeth curv- 

 ing toward each other, the upper the larger. A $ (scarcely mature) has the 

 side-stripes of the cephalothorax divided behind, and a median dark line- 

 The legs are mottled, brown bands before middle and apex of tibiae. The 

 abdomen pale, with small spots in the position of those of the <5 , and various 

 dark dots; the sternum spotted; the legs shorter than in £ . 



Four males and one female; Tepic, Oct. and Nov. 



194. Xysticus apertus, sp. nov. 



Plate XVI, Fig. 7. 



Length 7 mm.; ceph. 3 mm. long, broad 3 mm.; femur I 2.S mm. Cepha- 

 lothorax brown on the sides, ending in two darker brown spots, a black 

 median point, in front of which it is brownish, two darker median lines, a 

 white band connecting the S. E. ; mandibles mottled with brown at base, pale 

 at tip; sternum dotted with brown; a black line on coxae, and a spot on 

 trochanters; anterior legs very thickly mottled with brownish, posteriorly 

 paler on the femora, metatarsi and tarsi paler, a white line above on the 

 patellae and tibiae; hind legs less spotted, a large spot on the middle of 

 femora and a still larger one at the tip, and on the base and tip of patellae and 

 tibia;. The abdomen has a broad dentate whitish stripe in the middle, and 

 pale brownish ones on the sides, formed of the usual spots connected; sides 

 and venter dotted with brown. A. M. E. as large as P. M. E., and fully as 

 far apart, plainly nearer to the A. S. E. than to each other. Four pairs of 

 spines under anterior tibiae and metatarsi; sternum rather narrow, much 

 longer than broad. Abdomen very short, broader than long. 



One female and one young male; Cape Region. 

 195. Xysticus discursans Keys. 



Xysticus bimaculatus Em., Can. Spid., p. 416. 



One female, 5.2 mm. long, from Agua Caliente. It is 



