1. Monif AlRashidi:
Department of Biology, Faculty of Science, University of Ha'il,PO Box 2440, Ha'il,Saudi Arabia
2. Sami Saeed M. Hassan:
Department of Zoology, Faculty of Science, University of Khartoum,Khartoum,Sudan
3. Mohammed Shobrak:
Department of Biology, Faculty of Science, Taif University,PO Box 11099, Taif 21944,Saudi Arabia