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Species name

Diabrotica undecimpunctata undecimpunctata Mannerheim 1843: 310

 

Common name

Western spotted cucumber beetle

 

Type locality

Neu-Californiens [from title of work]

 

Type depository

FMNH-UH, lectotype, male, verified

 

Synonyms

soror LeConte 1865: 212 (type locality: California; type depository: MCZ, lectotype, female, verified)

 

Diagnosis

Body length 4.8-6.9 mm. Body width 2.4-3.9 mm. Head basic color black. Antennae filiform, bi- or tricolored, antennomeres 1-3 yellow, upper sides darkened, antennomeres 4-11 black. Maxillary palpi and labrum black. Pronotum yellow or sulphur yellow, subquadrate, bifoveate, with small round foveae, shagreened with minute wrinkles. Scutellum black. Elytra green, yellow or rufous, maculate with 12 round black maculae. Elytral epipleura completely yellow, sutural angle of elytra round, punctation scattered, fine. Abdomen black. Legs black. Aedeagus symmetric, with four internal sac sclerites.

 

Known distribution

USA: AZ, CA, OR, WA

 

Host plants

Beta vulgaris L., cantaloupe, cucumber, squash, gourd, sweet peas, beans, Austrian winter field pea (Lathyrus hirsutus L.), barley, rice, wheat, corn, tomato, potato, Cucurbitaceae, Fabaceae, Poaceae (Clark et al., 2004)

 

Potential problems with identification

Diabrotica undecimpunctata undecimpunctata can be separated from other subspecies by the following features: legs and abdomen entirely black in D. undecimpunctata undecimpunctata, partly pale in other subspecies.