Spiders associated with cotton and maize plants were recorded in Sharkia Governorate, Egypt, during 2009 season, Results revealed th e occ unen ce of eighteen sp ider species belonging to nine families. Ei ght and sixteen species were co ll ected from cotton an d mai ze plants, respectively. Thomisus spini(er Cambridge was th e most t!-equent spec ies, with 100.00 and 20.45 % for absolute frequency and relative freq uency of occUJTence, respectively, wh il e all Erigone sp., Gnathonarium den/alum (W ider), Ewyopis sp., and Cyrtuphora citricola (Forskal) recorded the lowest freque ncy occurrence 5.5 and l.l 3 %, respectively. Life cycle and female fec undity of Ko chiura aulica (Koch) (Theridiidae) were studied when fed on Spodoptera littorals (Boisd .) second instar larvae. Feeding capacity was also estimated. Obtained data cleared that K. aulica can be used as a biocontrol agent in integrated pest management program.