This work was carried out under laboratory conditions to study the biological aspects of citrus brown mite, Eutetranychus orientalis (Kelin) when fed on leaves of carica papaya (Solo and Fershold) varieties under laboratory conditions of 25 and 30oC and (60 + 5% R.H.). The biological aspects of E.orientalis could be studied, the incubation period, life cycle, generation and life span for both female and male, in addition to female pre-ovipostion, oviposition, post-oviposition, and total number of female's deposited eggs. Life cycle lasted (13.7 & 11.1) and (12.7 & 10.5) days with solo variety at 25 and 30oC for female and male, respectively, while it elongate with fershold to (15.1& 13.3) and (14.2 & 12.2) days at the same pattern. On the other hand, female pre-oviposition, oviposition and post-oviposition periods durated (1.9 & 1.2), (10.3 & 8.7) and (3.2 & 2.1) days respectively at 25 and 30 oC on solo variety, while, on fershold variety it lasted (1.6 & 1.00), (12.3 & 10.6) and (2.7 & 2.2) days, respectively. Solo carica papaya variety was more favorable host of E.orientalis development and fecundity than fershold variety. Therefore, solo variety more susceptible to citus brown mite E.orientalis.