OF WASHINGTON. 35 



Mandibles rather long and stout, thicker than femur I ; vertical, par 

 allel, but at the inner side at apex obliquely cut ; claw small and weak. 



Maxilla; longer than broad, subparallel, straight, hardly inclined over 

 labium ; anteriorly slightly rounded. 



Labium two-thirds the length of maxillae, square, a little broader than 

 long, and slightly broader at base than at the rounded apex. 



Sternum very prominent, cordiform, anterior margin truncate ; drawn 

 out considerably between coxae IV. 



Legs 4. i. 2. 3, weak and short, anterior and posterior of equal length ; 

 without spines. Calamistrum about halt as long as metatarsus IV ; 

 tarsal claws three, superior with six teeth, inferior very strong, without 

 teeth. 



Abdomen oval, truncate at base. Cribellum long, narrow and undi 

 vided ; spinnerets stout, short, of equal size, superior two-jointed. 



Prodalia foxii, nov. species. Plate I, fig. 5. 



Cephalothorax long, 0.5 mm. ; abdomen long, 1.3 mm.; total length, 

 1.8 mm. Leg I and IV, 2 mm. long ; II, 1.5 mm. ; III, 1.3 mm. 



Cephalothorax yellow testaceous ; trophi, sternum and legs pale yel 

 low ; abdomen grayish white with dark gray markings at the dorsum, 

 consisting of about five transverse angular lines pointing to the front ; 

 underside pale, region before the spinnerets darker ; abdomen and legs 

 sparsely covered with long, darker pubescence. 



The A. i,. K. and the p. M. E. and p. i,. E. form a cluster as in Neo- 

 phanes, but in Prodalia two minute A. M. K. are present. The spaces be 

 tween these eyes are filled out by black pigment. The mandibles have 

 no claw groove, but a short row of dark bristle-like hairs running longi 

 tudinally over the front. 



This spider and Neophanes belong undoubtedly to the family 

 Dictynida ; it was collected by Dr. Fox in Tennessee, where 

 it seems to be rare. 



Usofila, Keyserling, nov. genus.* 



Cephalothorax a little longer than broad, anteriorly moderately nar 

 rower than in the middle region ; p. cephal. prominent, strongly arched ; 

 clypeus high ; median fissure indistinct. 



Eyes 6 in two rows, anterior row consisting of four eyes, shorter and 

 slightly recurved, the two M. K. contiguous ; the two eyes of the posterior 

 row closely behind the lateral of the first row. 



* Count Keyserling, who examined this interesting spider, named it 

 Usqfila, and intended to publish the description in the eighth number of 

 his "Neue Spiunen aus Amerika," but was prevented by his untimely 

 death. I received from his publishers, amongst his other manuscripts, 

 also the description of Usofila, and present it herewith in translation with 

 that of the only species, U. gracilis. 



