232 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
anteriorly and triangularly narrowing caudad, but truncate between 
the widely separated fourth coxae, (Plate 16, fig. 6). 
Labium not free; distally strongly convexly rounded; much wider 
than long (cir. 7:4). 
Abdomen subglobose. Spinnerets terminal, (Plate 16, fig. 5). 
Bristles in comb of fourth tarsus eight or nine in number. Teeth of 
claws few, divaricate. 
Epigynum proportionately large, (Plate 16, fig. 7). 
Length of female, 3 mm. 
Locality.— San Miguel, 6,000 feet, July. (Type, M. C. Z. 182, one 
female). i 
LATRODECTUS MACTANS (Fabricius). 
Aranea mactans Fabr., Ent. syst., 1775, 2, p. 410. 
A species occurring widely in the western hemisphere from New 
England to Terra del Fuego. 
Localities.— Ollantaytambo, 9,000 feet, July 21. (M. C. Z. 183, 
five females and one male). Cuzco, 11,500 feet, July 12. (M. C. Z. 
184, two females). 
LITHYPHANTES NIGROFEMORATUS Keyserling. 
Spinnen Amerikas. Theridiidae, 1884, 2, pt. 1, p. 139, pl. 6, f. 87. 
A species previously known from Monterico in Peru and from 
Guatemala. 
Localities — Huadquina, 5,000 feet, July. (M. C. Z. 185, one 
female). Cuzco, 11,500 feet, July. (M. C. Z. 186, one female). 
ENOPLOGNATHA sp. 
A young female of uncertain species from Tincochaca, 7,000 feet, 
July. ECOL 187): 
ENOPLOGNATHA PERUVIANA, Sp. nov. 
Plate 16, fig. 8-11; Plate 17, fig. 1-2. 
Carapace and legs light brown or testaceous; sternum darker, of 
somewhat chestnut cast. Abdomen over anterior and caudal ends 
