Cuperfamily Argiopoidea 



AA. Scape of the epigynum longer than its width at the 



base. 



B. Scape of the epigynum less than twice as long as its width 



at the base. P. 470. A. cavatica 



BB. Scape of the epigynum more than twice as long as its 



width at the base. 



C. Each lateral half of the atriolum more or less distinctly 



divided by a furrow; scape long, usually narrow at the 



base, sometimes slightly widened, but not tapered 



evenly to the tip. P. 460. A. angulata 



CC. Lateral halves of the atriolum not subdivided; scape 



widest at the base and usually tapered evenly to the 



tip. P. 470. A. nordmanni 



Aranea angulata (A. an-gu-la'ta).— This is an exceedingly 

 variable species which is commonly believed to occur both in 

 Europe and in North America. 

 On both sides of the Atlantic 

 several of the varieties of what 

 is regarded as this species have 

 received distinct specific names. 

 It is one of the larger of the 

 four species mentioned here; it 

 lives among trees; and is usually 

 dark coloured like bark. In what 

 may be considered the more 

 typical form (Fig. 483), there is 

 a yellow spot or group of spots 

 on the middle line of the ab- 

 domen between or in front of the 

 shoulder humps; and on the hind 

 half of the abdomen there is a 

 distinct folium bordered by a 

 fairly even, undulating dark line. 

 The yellow marks between or 

 in front of the humps vary greatly in shape and maj be wanting. 



In many individuals the dark line bordering the folium is 

 broken into several pairs of very dark, oblique bare; as is the case 

 in the more common form of A. nordmanni (Fig. 484). 



This species is distinguished by the narrower and longer scape 



469 



L 



Fig. 483. 



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