The naturalist in Nicaragua: A narrative of a residence at the gold mines of Chontales; journeys in the savannahs and forests, with observations on animals and plants in reference to the theory of evolution of living forms.London: John Murray, 1874.
In this book Belt first described "the mutualistic relationship of certain Acacias and the ant we now know as Pseudomyrmex spinicola. These are a species of red myrmecophyte-inhabiting neotropical ants which are found only in Nicaragua and Costa Rica. They live in the thorns of a tropical tree, Acacia collinsii, feeding on nectaries along with the protein and lipid-rich pods produced by the plant for the ants and now known as Belsian bodies (or Beltian bodies) in honor of Belt" (Wikipedia article on Thomas Belt, accessed 07-31-2016).
Digital facsimile from the Biodiversity Heritage Library at this link.
Subjects: BOTANY, COUNTRIES, CONTINENTS AND REGIONS › Nicaragua, EVOLUTION, VOYAGES & Travels by Physicians, Surgeons & Scientists, ZOOLOGY › Arthropoda › Entomology