Morphology and biology of Euseius metwallyi n. sp. (Acari: Gamasida: Phytoseiidae)
Basha, A.-A.E.; Yousef, A.-T.A. and Mostafa, E.-S.M.  Two new species of the family Phytoseiidae from Egypt (Acari: Phytoseiidae)
Basha, A.A.E. and Yousef, A.T.A.  Effect of food on the biology of Cheletogenes ornatus (C. and F) (Acari: Prostigmata: Cheyletidae)
Zaher, M.A.; Yousef, A.E.T.A. and Kandil, M.M.  Morphology and biology of Typhlodromus africanus n.sp. (Acarina: Mesostigmata: Phytoseiidae)
Yousef, A.T.A.  Aegyptocheyla summersi n.gen., n.sp. (Acarina: Prostigmata: Cheyletidae)
Yousef, A.E.T.A.  A new species of the genus Histiostoma Kramer (Acarina, Astigmata, Anoetidae)
El-Tawab, A.; Yousef, A. and Metwally, S.H.  A new species of the genus Scutacarus (Acarina: Scutacaridae) in Egypt
Yousef, A.A. and Metawally, S.H.  Three genera of family Tenuipalpidae (Acarina) in the U.A.R. with description of three new species
Zaher, M.A. and Yousef, A.A.