Eight genera and 25 species are recognized among the Nearctic, Mexican
, and West Indian Oodini. Four new species are described: Oodinus pseu
dopiceus (type locality: Hillsborough River St. Pk., Hillsborough Co.,
Florida); Oodinus similis (type locality: San Quintin, Chiapas, Mexic
o); Oodinus darlingtoni (type locality: Cauto El Cristo, Oriente, Cuba
); and Oodinus edentulus (type locality: 31.8 mi E Francisco Escarcega
, Campeche, Mexico). Oodes fluvialis LeConte, 1863, previously recogni
zed as a subspecies of O. americanus Dejean, 1826, is given specific s
tatus. The following new synonymies are established: Eulachnocrepis Ha
bu, 1956 with Lachnocrepis LeConte, 1853; Stenocrepis texana (LeConte,
1863), S. chalcas Bates, 1882, and S. chalcochrous Chaudoir, 1883 wit
h S. insulana (Jacquelin du Val, 1857); Stenocrepis quatuordecimstriat
a (Chaudoir, 1843), S. picipes (LeConte, 1844), S. stenocephala (LaFer
te-Senectere, 1851), and S. sulcata Chevrolat, 1863 with S. mexicana (
Chevrolat, 1835). Lectotypes are designated for Oodinus alutaceus (Bat
es, 1882), Oodes amaroides Dejean, 1831, O. fluvialis LeConte, 1863, O
. americanus Dejean, 1826, Stenocrepis texana (LeConte, 1863), S. chal
cas Bates, 1882, S. lecontei (Chaudoir, 1857), S. quatuordecimstriata
(Chaudoir, 1843), S. picipes (LeConte, 1844), S. cuprea (Chaudoir, 184
3), S. tibialis (Chevrolat, 1834), S. femoralis (Chaudoir, 1835), S. e
legans (LeConte, 1851), and S. gratiosa (Bates, 1882). The genus-group
name Nanodes Habu, 1956, a homonym of Nanodes Schonherr, 1825, is rep
laced by Nanodiodes, new replacement name. For each genus treated, the
following are provided: citation of original description and selected
references, notes about synonymy (if required), description, geograph
ical distribution and diversity, and monophyly and phylogenetic relati
onships. For each species included, the following are given: citation
of original description and synonymies, type material, etymology (for
new species only), notes about synonymy (if required), diagnosis, desc
ription, geographical distribution, bionomics, and phylogenetic relati
onships (if the genus includes more than two species). Keys to genera
and, for each genus, to species are included. The species distribution
s are mapped, and the important structural features are illustrated.