Zool— Vol. I.] BANKS— MEXICAN ARACHNIDA. 21 3 



on outside, on inside with many granules, carinated, the ridge extending for- 

 ward in the form of a horn. Abdomen higher than long; epigynum similar 

 to P. globosus; eyes as in P. dugesi. Male palpus with the femur clavate, 

 patella very short, tibia convex above, tarsi with a long projection, nearly 

 truncate at tip (not long and flexuous as in P.dugesi), an inner, broader, 

 longer projection, rounded at tip, and a third much shorter; inside is an ovate 

 bulb. 



Two males and two females; Cape Region. 



25. Physocyclus globosus Tacz. — Sierra San Lazaro. 

 Quite common in Baja California. 



26. Physocyclus mexicanus, sp. nov. 



Plate XIII, Fig. 40. 



Length 4 mm. Cephalothorax pale yellowish, with brown spot above con- 

 nected forward with the eyes, three spots on each side, clypeus fuscous; 

 sternum and legs pale, brown rings at tips of femora and on patellae and on 

 bases and tips of tibiae; tips of palpi fuscous; abdomen pale, with some 

 dark spots on each side. Cephalothorax without thoracic elevation; eyes as 

 in/ 3 , globosus; abdomen about as high as long, somewhat flattened above; 

 epigynum much like P. globosus, but with the anterior processes much longer 

 and curved. 



One specimen; Tepic, Nov. 



27. Psilochorus minutus, sp. nov. 



Plate XIII, Fig. 42. 



Length 2 mm. Cephalothorax pale yellowish, with a brownish spot above 

 extending forward to each group of S. E. ; S. E. on black spots and a black 

 band passing through A. M. E. connecting them, from this band extends 

 forward down on the clypeus a slender, pointed, black mark; clypeus is infus- 

 cated; legs and sternum pale, pale brownish rings on tips of the femora and 

 bases and tips of tibiae; abdomen pale bluish gray, marked with darker 

 bluish and many silvery spots; region of epigynum yellowish, a prominent 

 dark spot on each side of venter behind the epigynum. Cephalothorax low 

 and eye-region somewhat elevated; posterior eye-row slightly procurved; 

 A. M. E. much smaller than other eyes; P. M. E. once and a half their 

 diameter apart. Legs slender, femora thickened toward base, tarsi indistinctly 

 divided; mandibles quite long and slender, a tooth in front over each fang; 

 abdomen a little longer than high, somewhat globose; epigynum projecting 

 conically, a curved transverse ridge; sternum very broad, broadly truncate 

 behind. 



One specimen; Sierra San Lazaro, Sept. 



