Superfamily Argiopoidea 



eyes are smaller than the lateral eyes. The clypeus is at least 

 twice as wide as the anterior eyes. The chelicerae are usually 

 but slightly convex; and the lower margin of the furrow of the 

 chelicerae is usually armed with from four to six teeth, rarely 

 with only three. 



Five species have been described from the United States; 

 three of these occur in the Far West; one, in caves in Indiana; 

 and the following is widely distributed. 



Tegenaria derhami (T. der-ha'mi).— This is the best-known 

 representative of the genus. It is a domestic species which 

 inhabits the dwellings of man in all regions of the world from 

 the Arctic Zone to the Tropics. The female (Fig. 673) is two 

 fifths inch in length. The cephalothorax is light yellowish 

 brown with two gray longitudinal stripes. The abdomen is 

 pale with many irregular gray spots, of which there is a series, 

 more or less connected, forming a median band, and many along 

 each side. The markings of the male are similar to those of the 

 female, but the abdomen is smaller. 



This species lives almost exclusively in cellars and neglected 

 buildings. Its web (Fig. 674) resembles in its more general 

 features that of the grass-spider; but as with that species varies 

 in form depending on its situation; sometimes instead of its being 

 a flat sheet, as shown in the figure, it is a deep, pocket-like sac. 



Genus CCELOTES (Ccel'o-tes) 



The clypeus is scarcely wider than the anterior eyes (Fig. 

 675). The chelicerae are very strongly convex and have the 

 lower margin of the furrow usually armed with only two or three 

 teeth. 



The spiders of this genus are very closely allied to Tegenaria 

 but can be distinguished by the characters given above. Their 

 form is more thick-set, recalling that of Amaurobius; their cephalo- 

 thorax is thicker, with the head broad, narrowed but little if at 

 all and very convex; and the legs are shorter. 



Very little has been published regarding the habits of -our 

 species of Coelotes. One is said to be common in woods and 

 another was frequently found in autumn and winter under leaves 

 (Banks '02). Simon states that the species of this genus live 

 in forests or in alpine prairies, where they are found under stones, 



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