Diabrotica rufomaculata Jacoby 1887: 529
BMNH, holotype, male, verified
Body length 6.7-6.8 mm. Body width 3.5-3.6 mm. Head basic color orange or rufous. Antennae filiform, bi- or tricolored, antennomere 1 deep malachite green, antennomeres 2-3 cinnamon brown, antennomeres 4-11 orange rufous. Maxillary palpi and labrum mars yellow. Pronotum green or deep malachite green, subquadrate, deeply bifoveate, shagreened with microsculptural narrow, long meshes. Scutellum orange rufous. Elytra bicolored, with yellow disk and green margins, with one humeral testaceous macula and two diffuse testaceous maculae on elytral disk. Elytral epipleura completely green, sutural angle of elytra dentiform, punctation scattered, fine. Abdomen pale olivine. Tarsi and tibiae orange rufous, femora deep malachite green. Aedeagus symmetric, with four internal sac sclerites.
Jacoby's (1887) description of D. rufomaculata is based on a unique specimen. Smith and Lawrence (1967) mentioned that the holotype is a female. We studied the holotype and found that it is a male. Two additional specimens in the Jacoby's collection in BMNH are females.
Potential problems with identification
Internal sac in D. rufomaculata is the same as in D. selecta Jacoby. The color and arrangement of the maculae on elytron allow distinguishing two species clearly.