Abstract
There are four types of sense organs upon the dorsal surface of the female black scale, these will be described separately in this paper. If we except the attempts made to find the number and distribution of these organs upon the body, the entire work was done by means of sections, in nearly all of these the body of the insect was cut transversely. In studying the glands upon the insect's body and in an attempt to work out the development and structure of the ocelli, a great many scales were sectioned. These slides formed the basis for this work but many other insects were sectioned, especially for this paper. With the exception of several other stains the technique has been described in the other papers.
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