upon it.--Sagacity of the mule.

CHAPTER 11.

Start on journey to Segovia.--Rocky mountain road.--A poor lodging.
--The rock of Cuapo.--The use of large beaks in some birds.
--Comoapa.--A native doctor.--Vultures.--Flight of birds that soar.
--Natives live from generation to generation on the same spot.--Do
not give distinctive names to the rivers.--Caribs barter guns and
iron pots for dogs.--The hairless dogs of tropical America.
--Difference between artificial and natural selection.--The cause
of sterility between allied species considered.--The disadvantages
of a covering of hair to a domesticated animal in a tropical
country.

CHAPTER 12.

Olama.--The "Sanate."--Muy-muy.--Idleness of the people.--Mountain
road.--The "Bull Rock."--The bull's-horn thorn.--Ants kept as
standing armies by some plants.--Use of honey-secreting glands.
--Plant-lice, scale-insects, and leaf-hoppers furnish ants with
honey, and in return are protected by the latter.--Contest between
wasps and ants.--Waxy secretions of the homopterous hemiptera.

CHAPTER 13.

Matagalpa.--Aguardiente.--Fermented liquors of the Indians.--The
wine-palm.--Idleness of the Nicaraguans.--Pine and oak forests.
--Mountain gorge.--Jinotega.--Native plough.--Descendants of the
buccaneers.--San Rafael.--A mountain hut.