As a young man of 26, Charles Darwin visited Sydney in January 1836, on board H.M.S. Beagle , during her five-year circumnavigation of the globe. For most of the time the Beagle was in Sydney, Darwin was on an inland excursion to Bathurst. Consequently, he gave himself very little opportunity to explore the natural history of Sydney. However, his servant Syms Covington did go sweeping for insects in Sydney, and was presumably involved in collecting other specimens of Sydney fauna. In total, the Beagle's Sydney specimens comprise at least 110 species of animals, including a mouse not previously described (originally Mus gouldii ; later Pseudomys gouldii ; unfortunately now extinct), a crab, a snake, frogs, lizards, shells (including an oyster, a mudwhelk, air breathers, a sand snail, and a trochid or top shell) and 97 insects, 42 of which had not previously been described, and four of which were named after Darwin: a Leaf beetle Idiocephala darwini ; a Seed bug Ontiscus darwini ; a Gasteruptiid wasp Foenus darwinii ; and a Bee Halictus darwiniellus . The remaining novel insects comprise six Leaf beetles (Chrysomelidae), four Stink bugs (Pentatomidae), a Seed bug (Lygaeidae), an Assassin bug (Reduviidae), a Water boatman (Corixidae), a Leafhopper (Cicadellidae), a Cicada (Cicadidae), a Flatid planthopper (Flatidae), a Froghopper or Spittlebug (Cercopidae), three Parasitic wasps (Chalcididae), an Encyrtid wasp (Encyrtidae), five Eucaratids (Eucharitidae), a Eulophid (Eulophidae), four Seed chalcids (Eurytomidae), five Lamprotatidae, and one Torymid wasp (Torymidae).