Fig. W.
Fig. F.]
Fig. M.
EXPLANATION OF THE FIGURES.
Brain (supra-œsophageal ganglion) of an ant (Lasius fuliginosus), magnified 60 diameters, seen from above.
Fig. W. Brain of the Worker.
Fig. F. Brain of the Queen (Female)
Fig. M. Brain of the Male.
St. = Brain trunk. L. op. = Lobus opticus (optic lobe). L. olf. = Lobus olfactorius sive antennalis (olfactory lobe). N. = Facetted eye. N. olf. = Nervus olfactorius sive antennalis (olfactory nerve). O. = Ocelli, or simple eyes with their nerves (present only in the male and queen). H. = Cellular brain cortex (developed only in the worker and queen). C. p. = Corpora pedunculata, or fungiform bodies (developed only in the worker and queen). R. = Rudimental cortex of male.
The length of the whole ant is: