Superfamily Argiopoidea 



Genus ULESANIS (U-le-sa'nis) 



These are very small spiders in which the dorsal cuticle 

 of the abdomen is firmly chitinized, and raised into a series of 

 humps. The abdomen is higher than long and extends forward 

 over the thorax to the head. Only one species has been found 

 in the United States. 



Fig. 359. ULESANIS AMERICANA a, male b, female 



Ulesanis americana (U. a-mer-i-ca'na). — This spider measures 

 only six hundredths of an inch in length and resembles a seed or 

 lump of dirt. It can be recognized by the accompanying copy 

 of a figure by Emerton, who described the species (Fig. 359). 



Genus D1PCENA (Di-poe'na) 



The members of this genus agree with Euryopis in having 

 the anterior median eyes larger and much wider apart than the 

 posterior median eyes; but they differ from that genus in having 

 a more globular abdomen, which is broadly rounded behind. 



The spiders are found on bushes or on the low branches of 

 trees, especially Conifers, where they spin an irregular web, similar 

 to that of Theridion; some species are found in moss; and others 

 under stones. 



Four species have been described from the eastern United 

 States. These can be distinguished by the following brief 

 characterizations. Two other species have been described from 

 the Pacific coast. 



Dipoena lascivula (D. Ias-civ'u-la). — Abdomen light yellow. 

 Length of body of female one twelfth inch. 



Dipoena buccalis (D. buc-ca'lis). — Abdomen light brown; 



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