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Species name

Diabrotica semicirculata Jacoby 1887: 521

 

Type locality

Panama, Tolé

 

Type depository

BMNH, lectotype, female, verified

 

Diagnosis

Body length 5.0-6.2 mm. Body width 2.4-3.1 mm. Head basic color yellow. Antennae filiform, bi- or tricolored, antennomeres 1-3 yellow, antennomeres 4-8 gradually infuscated, antennomeres 9-11 light cadmium. Maxillary palpi and labrum black or chestnut. Pronotum yellow or mustard yellow, subquadrate, weakly bifoveate, with wide shallow foveae, shagreened with minute wrinkles. Scutellum yellow. Elytra yellow or rufous, with three small black spots on each elytron and with short humeral and sutural vittae. Elytral epipleura completely yellow, sutural angle of elytra round, punctation scattered, fine. Abdomen yellow. Tarsi yellow or mars yellow, tibia bicolored, yellow, outer edge with piceous or testaceous line, or extensively darkened. Femora yellow. Aedeagus symmetric, with five internal sac sclerites.

 

Known distribution

Panama

 

Host plants

Unknown

 

Potential problems with identification

D. semicirculata Jacoby is very similar to D. relicta Suffrian and D. venancia Bechyné. They can be separated by the following features: in D. semicirculata tarsi and tibiae are yellow, but black or chestnut in D. relicta and D. venancia; head is yellow in D. semicirculata, but black in D. relicta and D. venancia. Diabrotica semicirculata is substantially smaller than both other species.