THE ORIGIN OF THE MYCETOCYTES IN PSEUDOCOCCUS

¹ BRYN MAWR COLLEGE, BRYN MAWR, PA.

1. The first and second polar bodies of Pseudococcus undergo fusion and form a polar nucleus. This contains 15 chromosomes.

2. The polar nucleus divides several times (probably a definite number of times) giving rise to the polar derivatives.

3. The polar derivatives may fuse with either migrating cleavage cells or with each other to form the giant cells. The numerical data furnished by chromosome counts as well as the purely cytological evidence support each other in arriving at this conclusion.

4. The giant cells migrate from the periphery to the symbionts to enter into association with these. When this process has been completed, the giant cells are known as mycetocytes.

5. Discussion regarding the nomenclature of the cells involved in these phenomena. Statement of the problems presented during the various stages of the investigation.

This article has been cited by other articles:

				S. Bongiorni, M. Mazzuoli, S. Masci, and G. Prantera Facultative heterochromatization in parahaploid male mealybugs: involvement of a heterochromatin-associated protein Development, October 1, 2001; 128(19): 3809 - 3817. [Abstract] [Full Text] [PDF]

				S. W. Brown and U. Nur Heterochromatic Chromosomes in the Coccids: The process of heterochromatization and the function of heterochromatin in coccid insects are reviewed Science, July 10, 1964; 145(3628): 130 - 136. [PDF]