Zool.— Vol. I] BANKS— MEXICAN ARACHNWA. 267 



222. Olios luctuosa, sp. nov. 



Plate XVI, Fig. 15. 



Length 9 11.5 mm.; ceph. 4.9 mm. long, broad 4.6 mm.; femur I 5.6 mm. 

 Cephalothorax, mandibles, sternum, and legs pale yellowish, the latter with 

 the metatarsi and tarsi darker; fang red-brown. Abdomen pale gray above, 

 with a median row of black spots in the posterior half, and numerous small 

 blackish dots, most numerous behind; venter spotted, and with a broad 

 black stripe from furrow to spinnerets, broadest at base. Cephalothorax 

 highest at posterior part of pars cephalica; posterior eye-row straight, equal, 

 M. E. fully twice their diameter apart, scarcely so far from the S. E. ; A. M. E. 

 larger, fully their diameter apart, closer to the slightly smaller A. S. E.; man- 

 dibles short and stout; sternum broader than long, triangular, sides slightly 

 rounded. Legs moderate; two pairs of spines under all tibise and metatarsi. 

 Abdomen not very large, rather truncate at base, blunt-pointed at tip, some- 

 what depressed. 



Two adults and several young from Tepic, Nov. 



223. Olios ferrugineus Koch. — One female, from Tepic. 



224. Selenops debilis, sp. nov. 



Plate XVI, Fig. 14. 



Length $11 mm.; ceph. 4.2 mm. long, broad 4.5 mm.; femur I 4.8 mm. 

 Cephalothorax, sternum, and legs pale yellowish, the former with a black 

 seam, the latter with dark spots at base and beyond the middle of the femora 

 and tibise, most distinct on the underside and on the anterior pairs; mandibles 

 rather reddish. Abdomen pale gray, darker on each posterior side, and 

 sometimes dark patches above. The A. M: E. about their diameter apart, 

 plainly closer to the very much larger P. M. E., which are fully twice their 

 diameter from the larger P. S. E. ; sternum scarcely longer than broad, 

 slightly narrowed in front, blunt behind. Legs short; three pairs of spines 

 under tibia; I and II, two pairs of small spines under tibise III and IV. Ab- 

 domen broad, truncate at base, broadest behind the middle, broadly rounded 

 behind. 



Two females and several young; San Jose del Cabo. 



225. Selenops sp.? — Many specimens from San Jose 

 del Cabo. These may be debilis, but all are immature; 

 some, however, are larger than adult debilis; the abdomen 

 is darker. 



