Bid oi ve 
ee 
HORIZONTAL SNARES AND DOMED ORBS. 157 
The next most common species of Tetragnatha is the Stilt spider, 
Tetragnatha grallator Hentz.1 In color the adult is not so brilliant as 
Extensa, being a dull gray; but in its general form, habits, and 
the structure of its web it corresponds with Extensa, but is 
larger, darker, and less attractive in appearance when adult. It 
differs, also, in its greater fondness for a location near or over water. Its 
webs are frequently seen stretched above the surface of running streams. 
In pools, in the quiet nooks of brooklets and creeks, where branches droop 
down from the banks and overhang the water, I often find a colony of 
The Stilt 
Spider. 
es {tily Ih. 
An / Mh 
an} { 
a = 
1 pointes | 
TRUDE ee gal 
vs Hh Wald. Mlk \ an ) Wwe i @!” 
\ ( } 
Tic. 149. Horizontal orb of the Stilt spider, stretched above a brooklet (Doe’s Run). 
Stilt spiders that have spun their horizontal orbs upon the leaves and 
twigs close down to the water’s face. As the wind moves the branches 
to and fro the webs almost dip into the stream beneath. Here the crea- 
tures hang and prey upon the insects that always frequent such sites in 
great numbers and hover over the stream. (Fig. 149.) 
Another fayorite position is underneath the boards and cross logs of 
17. elongata Walck., Nat. Hist. d. Ins. Apt., ii, page 211. Dr. Thorell has little doubt 
that THentz’s species T. grallator is identical with Walckenaer’s T. elongata. See “ Araneze 
of Colorado,” Bulletin U. 8. Geolog. Sury., 1877, page 479. 
