Observations which indicate heterochromatinization of an extra chromosome in the salivary gland cells of Drosophila hybrids H. E. M. de C. Bicudo OriginalPaper Pages: 161 - 166
Silver staining of Drosophila polytene chromosomes and the effect of hyaluronidase and lysozyme pretreatment V. J. Birstein OriginalPaper Pages: 167 - 173
Phenetic distances in the Drosophila melanogaster-subgroup species and oviposition-site preference for food components M. BosA. Boerema OriginalPaper Pages: 175 - 183
C-heterochromatin variation in the genus Eumigus (Orthoptera: Pamphagoidea) J. P. M. CamachoJ. CabreroE. Víseras OriginalPaper Pages: 185 - 188
Correlation between characters as related to developmental pattern in Drosophila S. CavicchiC. PezzoliG. Giorgi OriginalPaper Pages: 189 - 195
Extra heterochromatin in natural populations of Gomphocerus sibiricus (Orthoptera: Acrididae) J. GosálvezC. López-Fernández OriginalPaper Pages: 197 - 204
Cytotypes within the family Umbelliferae with special reference to the genera Seseli L. and Oenanthe L. (subtribe Seselinae) A. Hore OriginalPaper Pages: 205 - 211
Population biology of Avena XI. Variation in peripheral isolates of A. barbata S. K. JainK. N. RaiR. S. Singh OriginalPaper Pages: 213 - 215
Le caryotype et la spermatogénèse de Mus setulosus (bandes Q, C, G et coloration argentique) M. Jotterand-Bellomo OriginalPaper Pages: 217 - 227
Mimicry of isozyme adaptive advantage by gene association II. Adh genotype frequency variations in Drosophila cage populations reared at different temperatures S. SangiorgiE. PieragostiniS. Cavicchi OriginalPaper Pages: 229 - 234
The somatic and meiotic chromosomes of Puntius conchonius (Cyprinidae) from the Jammu and Kashmir state, India O. P. SharmaA. Agarwal OriginalPaper Pages: 235 - 237