الفهرس 
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Abstract
This study aimed to : 1.Determine some biological characteristicsof two feeding systems(C. undecimpunctata – S. avenae and C. 9-punctata – A. craccivora) at varying temperature regimes. 2.Measure egg cannibalism potential benefits for adult reproductive success and offspring fitness of C. undecimpunctata. 3.Examine the effect relatedness, gender and reproductive status on kin recognition in C. undecimpunctata. 4.Assess the effect of predator’s sex and prey species on functional response of C. undecimpunctata.Methods & Resultes : A stock colony of C. undecimpunctata was established in the laboratory from ca. 50 adults collected from a cabbage field in Mansoura University. Similarity, a culture of Coccinella 9-punctata was established in the laboratory of Economic Entomology from 30 individuals collected from different plantations and maintained as previously mentioned for C. undecimpunctata. Temperature had significant effects on developmental times of predator stages, total and daily consumptions of larval stage, and female and male stages, male and female longevities.Mating cross treatments did affect female fecundity until 10-clutches received, but not until 15-clutches. Females of C. undecimpunctata consumed a low number of their own (filial) eggs compared to eggs of other conspecific females (non-filial. The number of prey consumed by adult female and male of C. undecimpunctata increased significantly with increasing prey density. Conclusion: Coccinella undecimpunctata has higher predatory potential and higher fecundity at temperature ranged from 18-33 ˚C than C. 9-punctata.Egg cannibalism by C. undecimpunctata adults yielded measurable benefits for reproductive success and progeny development. Coccinella undecimpunctata exhibited a type II functional response, regardless of prey species or predator’s sex.