Spodoptera cosmioides is an armyworm moth of the family Noctuidae found in Central America and South America (from Panama and Trinidad south to Argentina).

Walker (1858)[1] originally described cosmioides, placing it in the genus Prodenia.

Pogue (2002)[2] revived S. cosmioides (Walker, 1858), as a valid species (though misspelled as S. cosmiodes), from synonymy with S. latifascia (Walker, 1856).

[3] However, S. cosmioides and closely related congeners feed on many herbaceous plants and are regarded as pests thereof (e.g. da Silva et al., 2017[4]).

Pogue (2002) saw voucher material from the following countries: Argentina, Bolivia, Brazil, Colombia, Costa Rica, Ecuador, French Guiana, Guyana, Panama, Paraguay, Peru, Trinidad, Venezuela.