ARANEIDA AGALENID^E. 59 



ARACHNIDA. 



Order ARANEIDA. 



Family DICTYNIDAE. 



Amaurobius beiinetti Blackwell. 



BLACKWELL, Ann. and Mag. of Nat. Hist., xvn, 41 (Canada). MARX, Proc. U. S. 

 Nat. Mus., xii, 1889, 510. 



Taken once in twilight just within the cave and once at "11." Its 

 distribution includes "Northeastern United States and Canada. It is 

 found under and among fallen leaves, under stumps, logs, etc. " (Nathan 

 Banks, East End, Virginia) . 



Family AGALENIDAE. 

 Tegenaria derhami Scopoli. 



SCOPOLI, Entom. Carnioli, 400. EMERTON, Trans. Conn. Ac., vm, 1890, 29, pi. 7, 



fig. 6 (New Hampshire, Massachusetts, Connecticut). MARX, Proc. U. S. Nat. 



Mus., xii, 1889, 516. 



Araneus domesticus CLERK, Sv. Spindl. , 76, pi. 2, tab. 9, fig. 2. 

 Aranea domestica LINNAEUS, Syst. Nat., ed. x, I, 620. 

 Tegenaria ci vilis WALCKENAER, Tabl. d'Aran.; C. Koch, Die Arachn., vm, 37, figs. 



618, 619. BLACKWELL, Spid. of Gr. Brit., i, 166, fig. 107; Spid. from Canada, 



Ann. Mag. Nat. Hist., xvn, 76. 

 Tegenaria medicinalis HENTZ, Journ. Bost. Soc. Nat. Hist., v, 462; Spid. U. S., ed. 



Burgess, 99, pi. 11, fig. 21; pi. 20, fig. 19. 

 Tegenaria derhamii EMERTON, Common Spiders, 1902, 97. 



This spider is very common about the mouth of Mayfield's Cave. It 

 is most abundant just within the door and for about 20 feet in, but is 

 common at "4," is often seen past the turn of the cave at "4," and 

 occasionally occurs as far back as " 18. " It builds a sheet or platform- 

 like web with a funnel and tube in one corner. The web is usually 

 located in a convenient angle in the wall and the tube always, so far as 

 observed in the cave, leads to a hole or crack in the wall or back of a 

 projecting angle of the rock. The spider rests at the opening of the 

 tube or out upon the platform and at the slighest unusual disturbance, 

 as the turning of a bright light upon it or the molesting of its web, dis- 

 appears into the funnel. December 9, 1904, a male was seen upon the 

 web of a large female. Webs of this species contained remains of 

 numerous flies. This spider is very senitive to bright light, and if 

 prevented from entering its retreat may be driven from its web by light 

 alone. 



"A common species in barns and cellars and has probably been 

 imported from Europe, where it is even more common." (Emerton 

 1902, 96.) 



