The Variation in the Blood-Cell Count of Periplaneta Americana (L.) during a Molt

Abstract
The total blood cell count of the American cockroach was examined by counting a large number of samples from individuals selected from a laboratory culture. The results indicate that the intraspecific variation is too great to establish a normal count which can be used as a basis for comparison to determine abnormalities caused by external factors. The data also show that there is a significant reduction in the blood cell population at the time of a molt which is followed by a very rapid recovery in cell numbers immediately after the skin is shed.

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