Two new species, Coscinoptera victoriana L. Medvedev sp. nov. and C. tamaulipasi L. Medvedev sp. nov., both from the state of Tamaulipas, Mexico, are described. Additional records for 17 other taxa (species and subspecies) of Clytrini occurring in Mexico are provided. Taxonomical status of some taxa is discussed. Key to the Mexican species of the genus Coscinoptera Lacordaire, 1848 is given. Anomoea flavokansiensis Moldenke, 1970 and Babia quadriguttata quadriguttata (Olivier, 1791) are recorded from Mexico for the first time.
Three specimens of Morpho helenor montezuma Guenée, 1859 have been recollected in two areas belonging to the Sierra Madre Oriental. It is the northernmost record for this butterfly in Tamaulipas, México.
Nine specimens belonging to two species of the family Castniidae were collected: Athis delecta (Shaus, 1911) (one specimen) was recorded in vegetation of Matorral and Athis inca orizabensis (Strand, 1913) (eight specimens) in Selva baja subcaducifolia with elements of Encino and Mesophilic Forest. Athis delecta represents a new record for Tamaulipas, while the second speciesit is reaffirmed for Tamaulipas, but it is new record for Querétaro.
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