Diabrotica brevilineata Jacoby 1887: 521
BMNH, lectotype, male, verified
Body length 6.0-6.9 mm. Body width 2.9-3.4 mm. Head basic color yellow. Antennae filiform, bi- or tricolored, antennomeres 1-3 uniformly yellow, antennomeres 4-8 cinnamon brown, antennomeres 9-11 light cadmium. Maxillary palpi yellow or amber yellow, labrum amber yellow. Pronotum yellow or buff yellow, subquadrate, weakly bifoveate with wide shallow foveae, shagreened basally with microsculptural narrow long meshes. Elytra yellow or rufous, maculate, with two short black lines or small spots in the apical part, usually associated with humeral and sutural black vittae. Elytral epipleura completely yellow. Sutural angle of elytra round, punctation dense, fine. Abdomen yellow. Legs yellow. Aedeagus symmetric, with five internal sac sclerites.
Potential problems with identification
Diabrotica brevilineata Jacoby is very similar to D. apicicornis Jacoby and D. septemliturata Erichson. They can be separated by the following features: the femora and maxillar palpi of D. apicicornis are black, but yellow in D. brevilineata; the labrum of D. brevilineata is yellow, but black in D. septemliturata. However, the most reliable feature that allows distinguishing D. brevilineata is the shape of the internal sac sclerites.