MORPHOLOGY OF THE HAEMOCYTES OF THE GIANT COCKROACH, BLABERUS GIGANTEUS, WITH HISTOCHEMICAL TESTS

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Abstract
The morphology of haemocytes of Blaberus giganteus (L.) was studied in vivo in adult insects, and in stained films of blood from all stages. The study included the measurement of cells and the application of several histochemical tests. It was concluded that four categories of haemocytes exist, prohaemocytes, plasmatocytes, granular haemocytes, and spherule cells, and that the last two categories are closely related, both having the capacity to concentrate neutral mucopolysaccharides in their cytoplasm. Criteria for separating the categories are given.