WEAVERS OF ROUND WEBS. 



121 



displi 

 cata. 



folium. The nests, moreover, were not as carefully formed as with those 

 sjjecies. ^''ertebrata makes its orb early in the evening, and thereafter 

 hangs to it pretty closely, unless disturbed. The traplines by which the 

 webs are connected with the nests are much deltated at the jioint of 

 union with the hub, and diverge at the point where they are united 

 with the nest. So that the spider, instead of clasping a single line as is 

 usual witli Trifolium, really has its feet upon several lines. I have seen 

 this peculiarity in traplines of Domicile spiders that had spun on iron 

 fences. Vertebrata appears to be a very diligent weaver, working with 

 steadiness and energy at the daily renewal of her snare, until early Oc- 

 tober. She then begins to show less activity ; the sluggishness increases 

 rapidly, the webs are rarely renewed, and 

 soon the spiders disajjpear within the 

 leaves and die. 



Ej^eira displicata is an interesting littk- 

 spider wliich makes a round web, usually 



somewhat inclined. I have found 

 Epeu-a j^ jjj j^g^y England, woven against 



a leaf whose edges were curled 



up and formed tlie support for 

 the foundation lines. I know little of its 

 general habits, but it is distributed quite 

 extensively throughout the United States. 



Among the most interesting of our 

 spider fauna is that group of the genus 



Ej^eira which may i)roperly be 



termed thg Angulata group. 

 Spider '^'^^ individuals are distinguished 



by two processes, more or less de- 

 cided and pointed, upon the base or front Fiu. lOS. Snare of Epeira displicata. From 

 , f ,^ 1 c .1 11 mi a sketch by Mr. Emerton. 



part or the dorsum ot the abdomen, ihey 



are situated near the margin and overhang the sides and the cephalotho- 

 rax. They are not hard or leathery like the spinous processes upon Acro- 

 soma and Gasteracantha, but have nearly the consistency of the abdominal 

 integument. To this group belongs the Diadem Spider, Epeira diademata, 

 so familiar in European landscapes, and known popularly as the Cross 

 Spider or Garden Spider. I have specimens of this species collected in the 

 United States, one as far to the north and west as Minnesota. The spider 

 undoubtedly has found lodging upon our shores, probably as an importa- 

 tion by immigrants from Europe, but is very rare as yet. 



Others of this group are Epeira gemma, a fine large species, which 

 inhabits the Pacific slope, and as far eastward at least as Utah ; also 

 Epeira cinerea, a large gray species, in many respects resembling E. gemma, 

 which ranges the Northern Atlantic slope and the Adirondack Mount- 



