1. Evidence for intra-cistronic recombination in Anopheles gambiae

   • P. J. Cooper
   • C. F. Curtis
   • B. Sawyer

   OriginalPaper Pages: 161 - 162

2. Silver staining analysis of nucleolar-organizer activity during spermatogenesis of Asellus aquaticus (Crustacea, Isopoda)

   • M. Di Castro
   • G. Prantera
   • A. Rocchi

   OriginalPaper Pages: 163 - 166

3. Hypotheses about speciation by chromosomal rearrangements in the Steropleurus martorelli complex (Tettigoniodea, Orthoptera)

   • J. Fernández-Piqueras
   • A. Rodriguez-Campos
   • C. Sentis-Castaño

   OriginalPaper Pages: 167 - 172

4. A contrasted pattern of chromosome evolution in two genera of lemmings, Lemmus and Dicrostonyx (Mammalia, Rodentia)

   • E. A. Gileva

   OriginalPaper Pages: 173 - 179

5. Cytological studies on mixoploidy and embryonic development in mosaic silkworms induced by low temperature treatment

   • N. Kawamura

   OriginalPaper Pages: 181 - 190

6. Molecular and chromosomal polymorphism in continental and insular populations from the southwestern range of Drosophila subobscura

   • J. M. Larruga
   • V. M. Cabrera
   • A. Gullón

   OriginalPaper Pages: 191 - 205

7. Population genetics of Anastrepha fraterculus (Diptera, Tephritidae) in different hosts: Genetic differentiation and heterozygosity

   • A. Malavasi
   • J. S. Morgante

   OriginalPaper Pages: 207 - 211

8. The genetic basis of pyrethroid and DDT resistance inter-relationships in Aedes aegypti I. Isolation of DDT and pyrethroid resistance factors

   • C. A. Malcolm

   OriginalPaper Pages: 213 - 219

9. The genetic basis of pyrethroid and DDT resistance inter-relationships in Aedes aegypti II. Allelism of R ^DDT2 and R ^py

   • C. A. Malcolm

   OriginalPaper Pages: 221 - 229

10. On intra- and interchromosomal associations in Drosophila ananassae

    • B. N. Singh

    OriginalPaper Pages: 231 - 235

11. Erratum

    Erratum Pages: 237 - 237