Superfamily Argiopoidea 



behind. In the adult female there is a pair of dark brown chitin- 

 ous plates which extend back from the epigastric furrow. 



This is a common species in the Antilles and in Tropical 

 South America. 1 found it at Austin, Tex. In the Bermudas 

 where I found it common on the walls of a room, it is known as 

 the dust-spider. It moved slowly, and was easily captured. 



Family LEPTONETID^E (Lep-to-net'i-dae) 



The Leptonetids (Lep-to-net'ids) 



This family includes small, six-eyed spiders, with long legs; 

 nearly all of the species live in caves. They differ from the scy- 

 todids, with which they agree in having six eyes and one tracheal 

 spiracle, in having a distinct suture between the labium and 

 sternum. 



Only three genera, each represented by a single species, are 

 known to occur in our fauna; these can be separated as follows: 



A. Anterior lateral eye of each side contiguous with an an- 

 terior median eye. Leptoneta 

 AA. Anterior lateral eyes separate from the anterior median 

 eyes. 

 B. Lateral eyes forming two diverging lines. Usofila 

 BB. Lateral eyes not forming diverging lines. Ochyrocera 



Genus LEPTONETA (Lep-to-ne'ta) 



Our only species of this genus is from 

 Ml. Diablo, Gal. Fig. 296 represents the 

 arrangement of the eyes. 



Leptoneta calif ornica (L. cal-i-for'ni-ca). — 

 Only the female has been described. It 

 measures one tenth inch in length. The eyes of leptoxeta 



■ , , , , , (after Banks) 



cephalotnorax and sternum are red-brown, 

 both with a black margin; the eyes are on black spots. The ab- 

 domen is gray above, marked transversely with blackish behind. 



Genus USOFILA (U-sofi-la) 



Only one species has been found in this country. 



Usofila gracilis (U. grac'i-lis). — This small spider measures 



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