A few secrete colouring matters other than chlorophyll.
Then come the glandular surface (C), which is formed of smooth polished epidermis with numerous glands that secrete the fluid contents of the pitcher, and finally the detentive surface (D), of which the cells are produced into long and strong bristles which point A FIG.
It is supposed that these beetles secrete a sweet substance on which the ants feed, but they have been seen to devour the ants' eggs and grubs.
And Leopold von Toskana, ihr Briefwechsel (2 vols., 1872); Briefe der Kaiserin Maria Theresa an ihre Kinder and Freunde (4 vols., 1881); Marie Antoinette: Correspondance secrete entre Marie-Therese et le comte de Mercy-Argenteau (3 vols., Paris, 1875), in collaboration with Auguste Geffroy; Graf Philipp Cobenzl and seine Memoiren (1885); Correspondance secrete du comte de Mercy-Argenteau avec l'empereur Joseph II.
Salivary glands are present, and in some carnivorous forms (Dolium) these secrete free sulphuric acid (as much as 2% is present in the secretion), which assists the animal in boring holes by means of its FIG.