1892.] NATURAL SCIENCES OF PHILADELPHIA, 43 . 



extending half way up the side; just above this a line of silvery 

 spots, smaller in size than in X. variabilis; above this a row of 

 blackish spots ; dorsum reddish or yellowish, with very few small 

 silvery spots; on middle of dorsum a pair of red-brown spots; be- 

 hind them another pair, sometimes united to a larger darker spot 

 at end of dorsum ; base of dorsum with no dark spots ; the end of 

 abdomen is more like a Jrontina than is that of L. variabilis ; the 

 tarsus of the male palpus as far as developed, is much more 

 triangular than that of L. variabilis. 



Infrequent, South Hill, Apr. ; Six Mile Creek, Oct. ; Fall Creek, 

 March. 



Stemonyphantes bucculentus Clerck. 



Infrequent, Buttermilk Creek, Six Mile Creek, Fall Creek, 

 South Hill. During autumn and winter. 

 Diplostyla nigrina West. 



Infrequent, Enfield Creek, Sept., Six Mile Creek, Nov. and Apr. 

 Diplostyla pallida, nov. sp. Plate II, fig. 29. 



Length $ 2mm. length 9 l-9mm. 



Cephalothorax pale greenish ; legs similar or paler ; sternum more 

 brownish ; mandibles more yellow ; eyes with a little black, abdo- 

 men grayish above, with several darker, but not black, cross bands ; 

 sides and venter similar to these cross bands; epigynum nearly 

 white, with a reddish spot each side ; palpal organ reddish-brown ; 

 legs very long, head of $ more elevated than in 9 , and with a few 

 stiff hairs; $ mandibles larger than 9. 



Three specimens, Williams Brook, Summit Marsh, Aug. 



Diplostyla alboventris, nov. sp. Plate V, fig. 31. 



Total length 9 2-2mm. 



Length of cephalothorax "ymm. breadth •6mm. 



Length of abdomen l-6mm. breadth 'Qmrn. 



Size varies somewhat more than usual. 



Cephalothorax yellow-brown, darkest at cephalic end and around 

 edges ; eye-region blackish ; mandibles, palpi, mouth-parts and 

 sternum similar to cephalothorax ; legs lighter with a tinge of 

 green ; abdomen white, cream or grayish, with a broad black stripe 

 on each side reaching to the spinnerets; above sometimes with a 

 basal median black spot; behind this four cross-bands, black ; the 

 first two sometimes divided in the middle ; the fourth often reaches 

 to the stripe on side, the others do not ; sometimes a trace of a fifth 



