1. Publisher's announcement

   Announcement Pages: I - I

2. Cytological studies of certain desert mammals of Saudi Arabia 6.. First report on chromosome number and karyotype of Acomys dimidiatus

   • A. A. Al-Saleh

   OriginalPaper Pages: 3 - 5

3. Mdg-1 mobile element polymorphism in selected Drosophila melanogaster populations

   • C. Biémont
   • C. Terzian

   OriginalPaper Pages: 7 - 14

4. Hybridization studies in the planthopper genus Ribautodelphax (Homoptera, Delphacidae)

   • C. F. M. den Bieman

   OriginalPaper Pages: 15 - 26

5. Sperm cell number per bundle in Gnorimus nobilis L. (Coleoptera, Scarabaeidae)

   • R. Jurečić

   OriginalPaper Pages: 27 - 31

6. Chromosomal locations of actin genes are conserved between the melanogaster and obscura groups of Drosophila

   • M. Loukas
   • F. C. Kafatos

   OriginalPaper Pages: 33 - 41

7. C-banding and DNA content in three species of Belostoma (Heteroptera) with large differences in chromosome size and number

   • A. G. Papeschi

   OriginalPaper Pages: 43 - 51

8. The founder effect theory: quantitative variation and mdg-1 mobile element polymorphism in experimental populations of Drosophila melanogaster

   • C. Terzian
   • C. Biémont

   OriginalPaper Pages: 53 - 63

9. A complex chromosomal polymorphism in Gobius fallax (Gobiidae, Perciformes)

   • G. Thode
   • G. Martínez
   • J. R. Lopéz

   OriginalPaper Pages: 65 - 71

10. Studies on chiasma distribution and chiasma movement in Zoniopoda tarsata (Orthoptera: Romaleidae)

    • J. C. Vilardi

    OriginalPaper Pages: 73 - 80