Requested reference
Exline, H. (1951). Tegenaria agrestis (Walck.), a European spider introduced into Washington State. Annals of the Entomological Society of America 44(3): 308-310. doi:10.1093/aesa/44.3.308 
-- Show included taxa
Exline, H. (1951). Tegenaria agrestis (Walck.), a European spider introduced into Washington State. Annals of the Entomological Society of America 44(3): 308-310. doi:10.1093/aesa/44.3.308 -- Show included taxa