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Biol Bull 48: 79-82. (February 1925)
© 1925 Marine Biological Laboratory
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PHYSIOLOGY OF THE ORTHOPTERA

HYDROGEN ION CONCENTRATION OF THE BLOOD AND ALIMENTARY TRACT OF CERTAIN ORTHOPTERA (GRASSHOPPERS)

JOSEPH HALL BODINE 1

1 ZOÖLOGICAL LABORATORY, UNIVERSITY OF PENNSYLVANIA

The blood of seventeen different species of grasshoppers tested by means of appropriate indicators shows an average pH value of 6.8. The average pH values for different parts of the alimentary canal are: fluid emitted from mouth 5.5; crop 5.7; cæca 6.2; stomach 6.4-7.4; intestine and rectum 6.4-7.2. Oxidation tests for hæmoglobin (guiac, P-diamino-benzene, a-naphthol) have been obtained with the alimentary canal and with no tissues outside of the alimentary canal.






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Copyright © 1925 by the Marine Biological Laboratory.