Zool.— Vol. I.] BANKS— MEXICAN ARACHNIDA. 285 



286. Marptusa melanognatha Luc. — Many specimens; 

 San Jose del Cabo, El Taste, Minititlan, Coral de Piedras, 

 and Hermosillo. 



287. Cyrba sp.? 



Length 3.5 mm. (young S). Blackish; palpi pale; first legs, except tarsi, 

 black; others pale, except the femora black, and a black line on each side of 

 metatarsi IV. Abdomen with a basal band reaching to posterior third, above 

 two parallel stripes to posterior third, and behind two oblique spots. Ceph- 

 alothorax with a white seam, and behind eye-region a white band. 



One specimen from Tepic. Allied to C. tceniola. 



288. Cyrene delecta Peck. — Several young specimens 

 from Tepic. 



289. Attus sp.? 



Length 3.8 mm. (immature). Black, with white palpi, a pale band on the 

 middle of the hind tibiae; coxae pale; basal band to abdomen, two oblique 

 stripes on the anterior sides, the front one curving backward, the other ob- 

 liquely forward, and side of cephalothorax narrowly white. 



One specimen from Tepic. 



290. Attus peninsulanus, sp. nov. 



Plate XVII, Fig. 16. 



Length <5 4.6 mm.; ceph. 2.3 mm. long, 1.8 mm. broad. The cephalo- 

 thorax yellowish, black on eye-region, a dark stripe on each posterior side 

 margin, and rather darker in the middle behind; clypeus and mandibles light 

 red-brown; legs pale, first pair infuscated; sternum pale. Abdomen pale, 

 sides dark, a median black stripe above, wider near middle, then suddenly 

 narrowed and deeply serrate behind; venter pale, usually with some dark 

 dots; one specimen has the abdomen wholly infuscated. First row of eyes 

 curved; S. E. fully one-half the size of the M. E., and well separated from 

 them. Cephalothorax moderately high, rather highest at dorsal eyes; eye- 

 region equally wide in front and behind. First pair of legs longest; first 

 coxae separated by full width of lip; fourth metatarsi spined to base. Tibia 

 of 3 palpus has a tooth on inner side at base and a long projection at tip 

 on outside. An immature 9 is like the S , but first pair of legs paler. 



Several specimens; Sierra San Lazaro, Sept., and two 

 from La Chuparosa. 



( 6 ) May 14, 1898. 



