252 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



black tipped, black spots on coxae, except first pair; sternum pale, with a 

 dark brown median spot, widest in front; abdomen yellowish, grayish be- 

 hind, sides lined with black, two black patches on the venter. Cephalothorax 

 broad in front; pars cephalica with a transverse hump each side behind the 

 eyes; eyes on elevations; P. M. E. closer together and larger than A. M. E, 

 Legs rather short. Abdomen nearly circular in outline, depressed, with a 

 circle of conical humps above, three near each anterior side, two on each, 

 posterior side, the hindmost the larger, and between these a median row of 

 three small humps above the spinnerets, hind margin of abdomen vertical; 

 the epigynum shows a median tapering finger with a blunt tip. In what I 

 take to be young specimens of this species, the abdomen is much narrower 

 and higher at tip. 



One adult female; Sierra San Nicolas; young from Cape 

 Region. Related to E. hoxcea Cambr., but it is different, 

 has a longer epigynum. 



156. Epeira gemma McCook. — Several specimens from 

 San Julio, San Jose del Cabo, and Ensenada. 



157. Epeira singularis, sp. nov. 



Plate XV, Fig. 4. 



Length $ 7.5 mm.; abdomen, broad 5.5 mm. Cephalothorax pale red- 

 dish brown; legs similar, yellow on base of femora, tibiae, and most of meta- 

 tarsus; sternum and coxae yellowish; abdomen dark gray, not uniform, but 

 no distinct markings, four deeply impressed dots, and behind three parallel 

 dark lines extending to tip; venter with two large pale spots. Cephalothorax 

 and legs clothed with fine white hair. Cephalothorax broad in front; P. M. E. 

 barely larger, but a little farther apart than the A. M. E. Legs short; sternum 

 a little longer than broad, triangular. Abdomen broad, nearly circular, mod- 

 erately high, just above spinnerets transversely wrinkled, on each side near 

 base is a large but very low hump. The epigynum has a finger more slender 

 than E. vulgaris and less slender than E. trivittata. 



One female; Pescadero. 



158. Epeira balustina McCook. — One female; Tepic. A 

 large species, with black femora. 



159. Epeira bivariolata Cambr. — Determined by Dr. 

 Marx. The epigynum is longer, and I feel doubtful. Like 



