Abstract
The chromosomes of seven Indian forms of beetles (Coleoptera) were investigated in their male germ cells, with special reference to the morphology of the sex chromosomes. The material studied and the results of observations are summarized in the table given below.
In every case studied the sex chromosomes segregate reductionally in the primary spermatocyte division.
The multiple chromosome which involves the unpaired X chromosome was found in three species of Buprestidae. The rod-shaped X chromosome is associated with a particular rod-shaped autosome (a little longer than the X) in the form of an end-to-end attachment, forming a V-shaped multiple, as known in some acridian species. The attachment is permanent for the species and no variation was found among the individuals.
