THE BLOOD TISSUE
Under this name Wielowiejski has included several important tissues or cellular bodies intimately concerned with the nutrition of the insect. These are:—
1. The blood corpuscles. (See p. 407, leucocytes and phagocytes.)
2. The fat-body proper (Corpus adiposum).
3. The pericardial fat-body (pericardial cells).
4. The œnocytes.
5. The garland-shaped cord of muscid larvæ.
6. The subœsophageal body, a peculiar organ found by Wheeler in the embryos and young larvæ of Blatta and Xiphidium.
7. The phosphorescent organs.