262 AMEEICAN SPIDERS AND THEIR SPINNINGWORK. 



Georgia. It is probably found in all parts of the United States and Canada. It loves the 

 neighborhood of streams, and stretches its horizontal snare above the water. I have found 

 them covering the plants around the base of a roaring waterfall. 



No. 108. Tetragnatha Banksi, new species. Plate XXIV, Fig. 6 ; PI. XXVIII, 4. 



Male: Total length, 6 mm., including the mandibles, 7.5 mm.; abdomen, 4 mm. long, 

 1 mm. wide ; cephalothorax, 2 mm. long, 1 mm. wide ; general colors for the fore part, uni- 

 form yellow, on the abdomen mottled with black. 



Cephalothorax : A long oval, widest in front ; the fosse a deep indentation upon the 

 summit of the corselet; corselet grooves indistinct; cephalothorax suture sufficiently marked. 

 Color yellow, tipped with brown, and sparsely covered with gray pubescence ; caput ele- 

 vated above the corselet and of like color; face wide, with pubescence in the ocular area. 



Sternum : Arrow shaped, longer than wide, receding from the apex, raised in the 

 middle where it is flattened ; color dull yellow, with scant pubescence. Labium long, wide 

 at the base, subtriangular at the tip; less than half the width of the maxillse, which are 

 long, club shaped, of nearly equal width throughout, roundly truncate at tips, which point 

 outwards. 



Eyes: Ocular quad widest behind, the length about equal to the width; MF on a 

 rounded elevation and separated by about 1.3 diameter, and smaller than MR, which are 

 separated by about two diameters. SF decidedly smaller than SR, and the two more 

 closely approximated than the middle group ; the space between SF and MF is about twice 

 the distance between IMF; between MR and SR a little greater than between MR. Front 

 row slightly recurved, rear row aligned or nearly so ; clypeus wide, equal at least to twice 

 the diameter MF. 



Legs: 1, 2, 4, 3; leg-II being but slightly longer than leg-Ill; thin, sparsely provided 

 with dark brown spines and feeble bristles; color yellow. Leg-I measures from 20.5 to 

 22 mm. The mandibles are about 2 mm. long, concave externally, slightly increased in 

 width towards the apex ; the fang evenly curved externally, but underneath slightly undu- 

 late, and extending below the tips of the maxillse when folded ; about six to eight teeth of 

 nearly equal length ; on the inner and upper surface a strong, long, slightly bifid spur. The 

 radial joint of the palp is about 1.5 times the length of the cubital joint, and is provided 

 with a slight curved projection, which distinguishes it from the males of other indigenous 

 species of Tetragnatha. 



Abdomen : The abdomen is cylindrical, about four times longer than wide, somewhat 

 narrowing towards the distal spinners. An indistinct folium marks the dorsal surface, 

 which is reticulated and flanked on either side by a band of brownish color. I have what 

 I regard as the female of this species, but am not certain as to the identity, and therefore 

 give no detailed description. In general form and color it resembles the male. 



Distribution : I have several specimens of this species, which I have dedicated to Mr. 

 Nathan Banks, from Florida, and one from Wisconsin. This would indicate a general dis- 

 tribution throughout the United States. 



No. 109. Tetragnatha laboriosa Hentz. Plate XXV, Figs. 7, 8. 



1850. Tetragnatha laboriosa, Hentz . . . J. B. S., vi., 27; Sp. U. S., 131, xv., 3. 



1865. Tetragnatha laboriosa, Keyserling Orbitel., Verh. Ges. Wien., 841, xx., 16, 17. 



1884. Telragnntha laboriosa, Emerton . N. E. Ep., p. 334, xxxix., 7, 8, 11, 19 ; xl., 17. 



1889. Tetragnatha laboriosa, Makx . . . Catalogue, p. 552. 



1893. Tetragnatha laboriosa, Banks . . Jour. N. Y. Entom. Soc, i., 131. 



Female: Total length, 7.5 mm.; abdomen, 5 mm. long, 2 mm. wide, receding to 1 mm.; 

 cephalothorax, 2 mm. long, 1.3 mm. wide. The size varies a good deal; the colors are 

 yellowish brown, with silvery abdomen. 



