136 AMERICAN SPIDERS AND THEIR SPINNINGWORK. 



habits existing side by side in the Lineweavers and an Orbweaver which 

 affects a Une weaving spinningwork. 



On one leafless bush I found two individuals established whose several 

 premises had been merged into one by the blending of the two labyrinths. 



(Fig. 120.) It was quite a case of cooperative housekeeping ; or, 

 Cooper- |.Q niake a closer analogy, it suggested the double houses one 

 „ often sees in city architecture, with united i)arty wall and com- 



keeping ^^^^^^ porch separated by a rail. The cross lines of the two 



mazes completely blended ; one spider was domiciled under a 

 leafy roof, the other under a woven tent; one orb faced toward the front, 

 the other toward the side of the united labyrintli. 



The Labyrinth Spider has a very wide distribution through the United 

 States, and will probably be found to inhabit our entire territory. It has 



been traced from New England south and westward to Colorado 

 ^®°' , and California, and I have specimens from several States of 

 ^T-^? .!^^ South America. These last, like numerous examples from South- 

 tion ^^"^^ California, differ from the more northern fauna in being 



larger and somewhat more brightly marked. Their cocoons are 

 also larger, and probably their snares are more formidable ; otherwise, they 

 are substantially the same species. It, therefore, must be added to that class 

 of our aranead fauna whose physical elasticity enables them to occupy with 

 equal facility a far northern and far southern home. However, in questions 

 of geographical distribution, the factor of vertical distribution ought not to 

 be forgotten, A far southern species may have a practically boreal habitat 

 by elevation upon a mountain range. I cannot si)eak positively as to this 

 point concerning South American Labyrintheas, but the specimens from 

 Southern California were taken from the seashore and the ordinary level 

 of San Diego. 



II. 



One of the most abundant of the small group of spiders that weave 



sectoral orbs is Epeira triaranea, so called because of its composite snare, 



which combines with that of the Orbweaver a decided retitelarian 



peira ^^^^ ^^^^^| ^^ quite good a])])roximation to that of the tubeweaver.i 



TT*1 fi "Vfi Y\ ftfl X c^j XI. 



I have found the orbs of this species, from June 1st throughout 

 the summer, on Inishes, shrubs, trees, hedges, on and between fences, and in 



^ This spider was first noticed by me under this name in Proceedinjis Academy of Nat- 

 ural Sciences, Philadelpliia, 1S7(), page 201. .Subse(Hiently, in tlie same journal, 1S7S, page 127, 

 I gave a full descrii)tion of tlic animal and its spinningwork, with ligures, under filename of 

 KjH'ira glol)osa, a spider closely reseinl)ling my species, which iiad l)een descrilu'il hy Kcy- 

 serling, N'erhand. d. zool.-bot. Ver., XX., 18(i5, page 820. I had tlie name changed at tliat time 

 in tlie page jiroofs of my paper, hut heing now less certain as to the identity of Kt-yserling's 

 species I Iblldw Mr. Emerton in returuing to juy original name. It is not improbable tiiat 

 Keyserling's name will ])e liaally given prioi'ily. 



