834 -/. 11. Emerton — Nev^ England E]>elridcf,. 



It a])pears to be the species common all over Europe. I have com- 

 pared specimens from France and Germany. 



Tetragnatha grallator nentz. 



T. grallator Keysorliiig, Beitrage zur Kenntuiss der (Jrbitflarice Verliandlutigeu Zool. 



Bot. Gesellsohaft, Wien, 1865. 

 T. elongata (Walck.) Tliorell in bulletin of Hayden's U. S. Geological Survey of the 

 Territories, vol. iii, no. "2. Tliurell describes several varieties aad thinks it prob- 

 able that this is the same as the Kiii-o])ean T. extensa. 



Plate XXXIX, figures 1, 2. 3, 4, 5. G. 

 T. grallator is the largest New England species. The female is 10 

 or 12"'™ long, ceplialothorax 3^""", mandibles as long as the cephalo- 

 thorax, front legs 35""" long. Colors as in extensa, varying from 

 light yellow to dark brown. In dark individuals, three stripes on 

 the cephalothorax and the markings on the abdomen are very distinct. 

 The abdomen is often twice as wide near the front end as farther 

 back. The mandibles are turned forward in some individuals nearly 

 horizontal. On the upper edge of the mandibles are two teeth near 

 the end, one large and one small, and seven small ones toward the 

 basal end of the claw groove. The lateral eyes are close together. 



The male is somewhat smaller, and has jaws longer than the cephalo- 

 thorax. The spines on the under side of the claw groove are very 

 small except one near the end, which is curved forward. On the 

 upper side of the groove the second tooth is large and prominent. 

 Behind this are five teeth of the usual size, followed by five or six 

 very small ones close together. Palpi G'""' long, tibia twice as long 

 as the patella and both together as long as the femur. 

 Eastern Massachusetts ; Central New York. 



Tetragnatha laboriosa iientz. 



Keyserling, Zool. Botan. Gesellsehaft iu AVieii, 1865. 



Plate XXXIX, figures 7, 8, 11, 19. Plate XL, figukk 7. 



Length of female about 7""". ' Smaller than extensa and grallator, 

 Cephalothorax 2-2^">"' ; first leg 12-17'""'. Mandibles short, about 

 half as long as the cephalothorax. Latei'al eyes as far apai-t as the 

 middle ones. The legs and cephalothorax are light yellow. The 

 abdomen is dark beneath with two light stripes. The back of the 

 abdomen is sometimes silvery white with transparent stripes ovei- 

 the dorsal vessel. In other individuals there is a very plain folium 

 with dark and light stripes along the sides. A few, apparently of 

 this species, had the abdomen bright green with a white stripe each 



