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Species name

Diabrotica obscura Jacoby 1887: 526

 

Type locality

Etla, Mexico

 

Type depository

BMNH, lectotype, male, verified

 

Diagnosis

Body length 6.0-6.5 mm. Body width 3.1-3.4 mm. Head basic color black. Antennae filiform, bi- or tricolored, antennomere 1 uniformly yellow, antennomeres 2-3 yellow, upper sides darkened, antennomeres 4-8 cinnamon brown, antennomeres 9-10 yellow, partly infuscated, antennomere 11 cinnamon brown or dark only apically. Maxillary palpi black or amber brown, labrum black. Pronotum yellow or yellow ocher, subquadrate, weakly bifoveate, with wide shallow foveae, not shagreened. Scutellum black. Elytra uniformly yellow ocher. Elytral epipleura completely yellow, sutural angle of elytra round, punctation scattered, fine. Abdomen yellow or black in the middle, yellow laterally. Tarsi and tibiae black, femora bicolored: apex (approximately 1/3) is darkened with black or brown. Aedeagus symmetric, with four internal sac sclerites.

 

Known distribution

Mexico

 

Host plants

Unknown

 

Potential problems with identification

Diabrotica obscura Jacoby is very similar to D. apicalis Baly and D. olivieri Jacoby. They can be separated by the following features: the elytra are completely yellow in D. obscura, but with apical black macula on each elytron in D. apicalis and D. olivieri; pronotum is weakly bifoveate, with wide shallow foveae in D. obscura, but nonfoveate in D. apicalis.