218 PROCEEDINGS OF THE ACADEMY OF [April, 



Lycosa signiventris n. sp. 



Cephalothorax brown, head black; a pale narrow median stripe 

 rom head to base, side margins narrowly pale, a short curved pale 

 stripe each side under dorsal eye reaching forward; mandibles with 

 tawny yellow hairs, except black along inner side, showing a broad 

 median black stripe, each side tawny; legs pale brown to middle, 

 rest darker, femora with a black mark below at tip, a narrow one at 

 base of tibia? and middle of tibia? and beyond nearly black; tibiae III 

 and IV pale beneath, with a black mark at base and at tip; coxa? 

 and sternum pale, the former infuscated. Abdomen pale above, 

 with a larger, black, basal spear-mark, followed by many small dots 

 and many lateral dots and marks; base of venter to furrow pale, 

 beyond covered with a large, deep-black mark, having each side of 

 the middle a clear pale elongate spot. Length 27 mm. 



From San Joaquin (Tristan). The common name is "Pica caballo. " 



Lycosa subfusca Cambridge. 



Biol. C. Am. Arachn. Aran., II, 325, 1902. 



Huacas (Pac). 

 Lycosa morosina n. sp. 



Cephalothorax with a broad bright yellowish-brown stripe on 

 middle, black in the eye-region, brown on sides, with indications of 

 some pale spots near margin; palpi yellowish, basal joint brown; 

 legs dark brown on femora, yellowish beyond; mandibles yellowish 

 brown, with some yellowish hairs. Sternum black, coxa? blackish; 

 abdomen dark brown, a black mark over base followed by a broad pale 

 yellowish mark, not extending far each side; venter black on sides, 

 pale in the middle with a median black stripe from vulva to spinnerets. 

 Legs long and slender, especially leg IV, anterior eye-row procurved, 

 much narrower than second row, three pairs of spines under tibia? 

 and metatarsi I and II. Vulva with two cavities in front, and a basal 

 plate behind. Near to L. dilatata of the "Biologia," but the vulva is 

 very different. Length 8 mm. 



One from Turrialba, August, Costa Rica (Picado). 



Lycosa brunnea Cambridge. 



Biol. C. Am. Arachn. Aran., II, 325, 1902. 



Embouchure du Rio Jesus Maria (Pac), January (B. and T.). 



Lycosa tristani n. sp. 



Cephalothorax brown, a broad pale median stripe, slightly broad- 

 ened a little behind the eye-region, then tapering to tip; abdomen 

 brown on middle, with a broad median spot of yellowish hair, with a 



