1892.] NATURAL SCIENCES OF PHILADELPHIA. 51 



Tetragnatha vermiformis Em. 

 One specimen. 



Tetragnatha extensa Linn. 



Not uncommon. 

 Tetragnatha grallator Hentz. 



Very common. 

 Tetragnatha laboriosa Hentz. 



Common. 

 Tetragnatha straminea Em. 



Common. 

 Tetragnatha caudata Era. 



Rare, Inlet Marsh, males and females ; the latter resemble the 

 former. 



Tetragnatha pallida, nov. sp. Plate V, figs. 88, 8Sa. 



Total length $ , not including mandibles, 9' mm. 



Length of cephalothorax 3" mm. breadth I'Smni. 



Length of maudibles o'4mm. fang 2-8mm. 



Length of tibia and patella I $ 10' mm. 



Cephalothorax, legs, palpi, mandibles, mouth-parts and sternum 

 yellowish, lip darker, fang reddish, and tip of palpus a little red- 

 dish ; abdomen gray with many small silvery spots, no other mark- 

 ings ; abdomen long, slender and cylindrical ; narrower than cei^h- 

 alothorax ; legs long ; S. E. farther apart than M. E.; lower S. E. 

 smaller than other eyes ; mandibles very long, a large tooth in front ; 

 the largest tooth on side is the distal one, fang bent, tibia of palpus 

 about twice as long as patella. It differs from T. grallator in posi- 

 tion of eyes and shape of mandibles; from T. vermiformis in shape 

 of mandibles and length of tibia of male palpus ; from T. straminea 

 in eyes and mandibles ; from T. extensa in eyes, mandibles and 

 tibia of male palpus ; from T. laboriosa in eyes, mandibles and 

 tibia of male palpus ; from T. caudata in eyes, mandibles and shape 

 of abdomen ; from T. Jiuviatilis in position of eyes ; from T. illin- 

 oiensis in position of eyes. 



Two male specimens. 



Pachygnatha brevis Keys. 



Not uncommon in marshes, Nov., Dec. 

 Pachygnatha autumnalis Keys. 



Not uncommon, Fall Creek, Round Marshes, Six Mile Creek, Oct., 

 Dec. 



