About Sitophilus oryzae A.Hustache, 1930
Adult Sitophilus oryzae, commonly called the rice weevil, are usually 3โ4.6 millimetres (0.12โ0.18 in) long, and have a long snout. Their bodies appear brown or black overall; when examined closely, four orange or red spots are arranged in a cross on their wing covers. This species is easily confused with the visually similar maize weevil. Maize weevils are typically somewhat larger than rice weevils, but specimens have been recorded where rice weevils reach the maximum size of the largest maize weevils, and maize weevils are nearly as small as the smallest rice weevils. Some external features can be used to tell apart the vast majority of adults of the two species, but only genitalia features are reliable for identification. Both species are capable of hybridizing, and the genitalic structure of these hybrids has not been documented.
