584 PROCEEDINGS OF THE NATIONAL MVSEVM. vol.xxii. 



THARGALIA LUCTUOSA, new species. 



Length of female, 7.8 mm,; cephalothorax, 3.5 mm.; tibia + patella 

 I, 3.-1: mm. 



Cephalothorax pale reddish l)rown, rather darker on the sides, 

 clothed in the middle with 3^ellowish-white hairs; abdomen black 

 above, with white marks — a somewhat triangular mark in front, con- 

 nected behind to a broad band; behind this are two white spots, and 

 beyond at near middle of length are two transverse white patches; 

 behind these are two small white dots, and near tip a white band, 

 extreme tip black; the sides show two broad oblique bars, both near 

 base; venter brown; sternum pale red-brown; legs pale reddish brown, 

 yellowish on anterior pairs beyond patellpe, femur III pale at base, 

 brown beyond and on part of patella and tibia, and most of metatarsus; 

 femur IV pale at l)ase, dark brown beyond, patella and tibia black, 

 the latter with prominent basal and apical white bands, metatarsus 

 black. Cephalothorax rather slender, narrow in front; eyes close 

 together, anterior row straight, subequal, and at equal distances, pos- 

 terior row procurved, posterior median eyes farther from each other 

 than from the equal posterior side eyes; sternum truncate in front, 

 rounded on sides, pointed behind. Two pairs of spines under tibia 1, 

 two pairs under metatarsus I, three pairs under tibia IV, and one 

 above near tip. Entire dorsum of abdomen rather tough, but no dis- 

 tinct shield. The epigynum shows two approximated elliptical cav- 

 ities; in the anterior part of each is a deeper cavity. 



One female from Santa Rita Mountains, May. 



Tyjx^.—Q^t. No. 5427, U.S.N.M. 



Family THERIDIID.E. 



LATHRODECTUS MACTANS (Fabricius). 

 One female from Oracle, July. 



LITHYPHANTES, species. 



One female from Oracle, Juh% near to L. fulvw^, but apparently 

 distinct; at least a color variety. 



DIPCENA PARVULA, new species. 



Length of female, 2.2 nnn. 



Cephalothorax, legs, mandibles, and sternum dark 3^ellowish brown, 

 black in e\"e region; abdomen black. Cephalothorax high, projecting 

 in front, clypeus concave. Posterior eye row nearly straight; poste- 

 rior median eyes less than diameter apart, more than diameter from 

 slightly smaller posterior side eyes; anterior eye row (seen from above) 

 recurved; the anterior side eyes touching posterior side eyes, and of 



