SPIDERS 



walls of outhouses, wherever the various species may happen to be found. The posterior pair 

 of spinners is usually much longer than the other two pairs. 



15. Agelena labyrinthlca (Clerck) 17. Tegenaria atrica, C. L. Koch 

 Colmbrook (Webb) Burnham Beeches (Webb) 



1 6. Tegenaria derbami (Scopoli) 

 Chipping Wycombe (F. P. S.) 



ARGIOPIDJE 



The spiders included in this family have eight eyes, situated in two rows, the lateral eyes 

 of both rows being usually adjacent, if not in actual contact, while the central eyes form a 

 quadrangle. The tarsal claws are three, often with other supernumerary claws. The web 

 is either an orbicular (wheel-like) snare, or consists of a sheet of webbing beneath which the 

 spiders hang and capture the prey as it falls upon the sheet. 



1 8. Araneus umbraticus, Clerck 21. Linyphia triangularis (Clerck) 

 Colmbrook (Webb) ; Chipping Wycombe Colmbrook (Webb) 



(F. P. S.) 22 Ll n yphi a montana (Clerck) 



19. Araneus diadematus, Clerck Colmbrook (Webb) 

 Chipping Wycombe (F. P. S.) 22> Linyphia hortensis, Sundevall 



20. Araneus marmoreus, Clerck Colmbrook (Webb) 

 (O. P.-C.) 



THERIDIID^ 



The members of this family have eight eyes situated very much like those of the 

 Argiopidce, but the mandibles are usually weak, the maxillae are inclined over the labium, and 

 the posterior legs have a comb of stiff curved spines beneath the tarsi. The web consists of 

 a tangle of crossing lines, and the spider often constructs a tent-like retreat wherein the egg- 

 sac is hung up. 



24. Theridion ovatum (Clerck) 



DICTYNID^E 



The species possess the calamistrum and cribellum and three tarsal claws, but the eyes, 

 eight in number, are situated in two transverse rows, the laterals being in contact. They 

 construct a tubular retreat with an outer sheet of webbing, which is covered with flocculent 

 silk made with the calamistrum with threads from the cribellum. 



25. Amaurobius similis (Blackwall) 26. Amaurobius fenestralis (Strcem) 

 Burnham Beeches (Webb) Colmbrook (Webb) 



Known also under Ciniflo. Known also as Ciniflo atrox. 



109 



