1903.] NATURAL SCIENCES OF PHILADELPHIA. 343 



ish. Legs pale yellowish, tips of tibise dark; palpi pale on base, black- 

 ish beyond. Dorsum of abdomen pale grayish- white, with a broad 

 gray folium, distinct in outline, but pale within, its anterior edges 

 broadly marked with black, this black in front connects to the basal 

 ends of the black side stripes, these stripes are broad black ones on 

 each upper side of abdomen, below them the sides are pale yellowish; 

 on the middle of the venter is a large black area, containing a central 

 square pale spot. 



It is of the usual structure of the genus, the legs, however, rather 

 longer than usual. 



Length 4 mm. 



One female; a very pretty species. 



Isaloides toussaintii n. sp. 



Cephalothorax pale yellow, more brownish on the sides; mandibles, 

 palpi and sternum pale yellowish; hind two pairs of legs pale yellow; 

 anterior pairs more red-brown, with a pale spot beyond middle of tibia; 

 abdomen pale gray, with a broad brown stripe from base to tip, with 

 irregular sides, and covering the tubercles ; venter pale, rather darker 

 in the middle. Cephalothorax flat above, eye-region but little ele- 

 vated; clypeus low; no dorsal' groove ; posterior row recurved, P.M.E. 

 about one and one-half diameter apart, and fully as far from the P.S.E. ; 

 A.M.E. much lower down than A.S.E. so that the eyes are really in 

 three rows, A.M.E. not half the size of P.M.E., but fully twice the 

 diameter apart; A.S.E. fully twice as large as P.M.E. and about two 

 diameters apart. Four pairs of spines under tibiae I and II, three pairs 

 under these metatarsi. 



Length 6 mm. 



Several specimens ; diflfers from I. octoperlata Sim. in the shape of the 

 vulva, as well as in minor characters. 



Metacyrba pictipes n. sp. 



Cephalothorax dark red-brown, a narrow white side-margin; abdo- 

 men greenish-brown, with a pair of parallel submedian pale lines above, 

 made up of dots, rather indistinct; sternum dark red-brown; venter 

 greenish-brown, with indistinct pale lines each side ; tips of palpi white ; 

 mandibles reddish-brown; yellow hairs around eyes and on clypeus. 

 Legs brown, tarsi white, a pale spot beneath on trochanters, patellae 

 above are almost wholly pale yellowish, an indistinct pale line above 

 on femora and tibiae, scarcely visible on the anterior pair. 



Structure similar to M. tceniola Hentz. 



Length 3.8 mm. 



