Thirteen genera of Eucnemidae containing forty species were collected from the Iquitos

region in Peru. Nine of the genera are new to the country: Rhagomicrus Fleutiaux, 1902,

Adelorhagus Horn, 1890, Adelothyreus Chevrolat, 1867, Microrhagus Dejean, 1833,

Dyscharachthis Blackburn, 1900, Heterotaxis Bonvouloir, 1871, Spinifornax Fleutiaux,

1926, Serrifornax Fleutiaux, 1926 and Maelodrus Fleutiaux, 1928. The previous eucnemid

record from Peru contained eleven species in ten genera. Only one of the forty species

caught, Entomophthalmus americanus Bonvouloir, was previously known and described

from the country. Dyscharachthis, Maelodrus and Adelorhagus are recorded from South

America for the first time. Many of the collected species seem to favor white-sand forest as

their habitat. Possible reasons for this are discussed. A list of eucnemids from Peru is

included, containing taxa already recorded from the country and also taxa that are likely to

occur there. A key to the Peruvian genera is included.