126 



MODERN SYSTEM. 



of the anus short and nearly equal, of a conic form ; lip nearly se- 

 micircular, broader than long, and projecting between the maxillae : 

 (ej/es eight,) 



* Ei/cs n'oi describhig the segment of a circle. Maxilla straight' 

 ened towards their extremities, but not dilated. 



Genus 14. SYCTODES. Latreille, Walckenaer, Leach. 



Maxilla: oblique and longitudinal, covering the sides of the lip; their 

 bases thickened, the apex internally oljliqucly truncated : lip some- 

 what quadrate, the base a little contracted': legs with the fourth, 

 then the first pair longest; the third pair shortest. 



Sp. 1. Si/c. thoixicica. Pale reddish-white, spotted with black : thorax 

 large and somewhat orbicular, elevated round)}' behind : aljdomen 

 lighter in colour, and subglobose. 



Inhabits Paris, in houses. It has twice occurred near Dover, but both 

 the individuals were females. 



Genus 1.5. THERTDIUM. Wakkender, Latreille, Leach, 



Maxilla with an oblique direction covering the sides of the lip, con. 

 verging towards their points ; of equal breadth ; the internal apex 

 obtuse, or obliquely truncated : lip small, triangular, or semicircu- 

 lar ; the apex truncate or subrounded : legs elongate, the first, then 

 the fourth pair longest ; eyes Avith four in the centre, forming a qua- 

 drangle, the under ones placed on a common elevation ; two others 

 on each side geminated, and situated on a common elevation, 



Sp. 1. Th. sisiphum. Rufous : abdomen globose, with three lines, 



Theridium sisiphum. Leach. 



Inhabits Europe, in the eorners of buildings, walls, and rocks. It is 

 Jigured by Lister, t. li.Jig. 14. 



Genus 16. PHOLCUS. Wakkemier, Latreille, Leach. 



Maxilla oblique, covering the sides of the lip, converging from the 

 base to the apex : apex internally truncated : lip transversely qua- 

 drate ; the lateral angles of tlie apex rounded and somewhat mar- 

 gined: /<'^s very long and very slender ; the first, then the second 

 and fourth (nearly equal) the longest: eyes inserted on a tubercle ; 

 two geminated and placed transversely in the middle; three on each 

 side amassed in a triangle, one larger than the rest. 



Sp. 1. Ph. j)lialangi'uides. Pale-livid: abdomen elongate, cylindric-oval, 

 very soft, obscure cinereous : tip of tlie tibije and thighs with a pale 

 ring of a whitish colour. 



Pholcus phalangioides. Walck., Lutr., Leach. Aranea Pluchii. Scopol. 

 Aranea opilionides. Sckrank. Aranea phalangioides. Fourcroy. 



Inhabits houses in Europe; in the western parts of Englancl it is ex- 

 tremely common. Its body vibrates like that of a tjpulideous in- 

 sect. 



