50 



THE SPIDERS OF EPPING FOREST. 



-F/£.S. 



Cluhiona conipta. Male. 

 t. Clubiona hrevipes ,, 

 M, Clubiona reclusa ,, 



Tibia, viewed from above. 



>» 



»> 



Plate V. — Epigynal Armature of Female Spiders. 



Clubiona terrestris 

 Clubiona neglecta 

 Clubiona pallidula 

 Clubiona holosericea 

 Clubiona coiiipfa 

 Clubiona feclusa 

 Chiracanthiuin carnifex 



h. Clubiona diversa 



ORDER ARANEAE. 



SUB-ORDER OPISTHOTHELAE (Pocock). 



SECTION MYGALOMORPHAE (see vol. xii., page 192.) 



Family ATYPIDAE. 



Cephalo-thotax usually with a longitudinal impression, but this is almost 

 obsolete in Atypus. Eyes 8, arranged in three groups of 3. 2. 3. Ocular area 

 small, broader than long, Clypeus narrow. Falces highly developed, articulated 

 so as to permit of motion in a vertical plane : basal joint naiTower beneath : fang 

 groove absent, a single row of denticulations is present, and lies on the inner side 

 of the fang when the latter is at rest. Maxillae usually absent, but well 

 developed in Atypus. Palpus : Female : pediform. Male : palpal tibia without 

 apophysis, palpal organs usually very simple, rather more complex in Atypus. 

 Legs robust : tarsal claws 3. Abdomen rather short : a distinct anal tubercle 

 is present above the superior spinners. Latninal tracheae four in number, the 

 posterior pair being well separated from the anterior pair. Spinners normally 6, 

 the superiors often long and upturned : cribellum absent. Genital aperture of 

 female without special armature. 



The Atypidae are spiders of rather large'size and sombre colours, and are found 

 chiefly in tropical and sub-tropical regions. The sexual differences are very con- 

 siderable. Only one genus of this family is represented in Britain. 



Genus A TYPUS Latreille, 



Spiders of moderate size which spin partially subterranean 

 tubes. They seize their prey through the substance of the 

 exposed portion of the tube, the rent thus caused being after- 

 wards repaired from the inside. One species of Atypus^ A. 

 affinis, Eichw., is not rare in the south of England, and another 

 species, A. beckii, Cambr. has been taken on two occasions. Up 

 to the present the genus has not been found in Epping Forest, 

 although it is quite possible that it may exist in some of 

 the sandy parts. 



