Abstract
Since 1938, I have devoted myself to the genetic study of Drosophila montium. So far thirty mutant characters have been found and assigned to three linkage groups.
The oogonial chromosome complex consists of four pairs of chromosomes : two large V-shaped pairs, a rod-shaped pair and a pair of small chromosomes which are V-shaped in Race A and rod-shaped in Race B. Presumably the linkage group whose mutant character has not been found, corresponds with the smallest chromosome.
A more detailed cytological account will appear in the coming number of Cytologia.
The description, locus, date of discovery and the ranking of each character are published. The tentative chromosome maps are shown in Fig.15.
