Two other species--Eciton vastator, and Eciton erratica--both of which
are blind, move entirely under covered ways in search of promising
hunting-grounds. Their arcades are sometimes two hundred yards in
length, the grains of earth being taken from the soil over which the
column is passing, and fitted together without cement. In this they are
distinguished from the covered ways made by the termites, who use a
glutinous saliva for cementing their edifices. These blind ecitons
build up the side of their convex arcade, and in a wonderful manner
contrive so to fit in the key-stones, without allowing the loose
uncemented structure to fall to pieces. Whenever a breach is made in
any of their covered ways, the workers remain behind to repair the
damage, while the soldiers issue forth in a menacing manner, rearing
their heads, and snapping their jaws with an expression of fiercest rage
and defiance.
The above account will give some idea of the vast numbers and varieties
of the termites and ants of this region, and of the wonderful way in
which Providence has furnished them with the means of sustaining
existence, and taking their part in the economy of nature. Science is
deeply indebted to Mr Bates, for his persevering efforts and acute
observation in making known the varieties and habits of these curious
insects.