Oulema melanopus

Authority: 

(Linnaeus, 1758)

Common name: 

Cereal Leaf Beetle
Size: 4..3-5.3mm
Basic colour: Dark blue (elytra) and orange-red
Pattern colour: None
Number of spots: None
Pronotoum: Orange-red
Leg colour: Orange-red with dark tarsi
Confusion species: Oulema rufocyanea

Oulema rufocyanea

Authority: 

(Suffrian, 1847)
Size: 4.0-4.8mm
Basic colour: Dark blue (elytra) and orange-red
Pattern colour: None
Number of spots: None
Pronotoum: Orange-red
Leg colour: Orange-red with dark tarsi
Confusion species: Oulema melanopus

Cassida vittata

Size: 

5.0-6.5mm

Basic colour: 

Yellow or pale green (when alive, with a gold-silvery elytral stripe between striae 2 and 6).

Pattern colour: 

None

Leg colour: 

Yellow, sometimes with narrow darkening at the femoral bases.

Cassida vittata

Authority: 

de Villers, 1789

Common name: 

Borded Tortoise Beetle
Size: 5.0-6.5mm
Basic colour: Yellow or pale green (when alive, with a gold-silvery elytral stripe between striae 2 and 6).
Pattern colour: None
Number of spots: None
Pronotoum: As basic colour
Leg colour: Yellow, sometimes with narrow darkening at the femoral bases.
Confusion species: Cassida nobilis

Cassida viridis

Authority: 

Linnaeus, 1758

Common name: 

Green Tortoise Beetle
Size: 7-10mm
Basic colour: Green
Pattern colour: None
Number of spots: None
Pronotoum: As basic colour
Leg colour: As basic colour

Cassida vibex

Size: 

5.5-7.5mm

Basic colour: 

Green or yellowish-green. When alive, usually with a variable metallic reflection.

Pattern colour: 

Elytra with a triangular spot around the scutellum and dark spots on the suture (which may fuse to form a broad dark sutural band merging with the scutellar spot). Usually also a small black spot near the middle or outside of the elytra.

Spot fusions: 

Sometimes

Leg colour: 

As basic colour

Cassida vibex

Authority: 

Linnaeus, 1767
Size: 5.5-7.5mm
Basic colour: Green or yellowish-green. When alive, usually with a variable metallic reflection.
Pattern colour: Elytra with a triangular spot around the scutellum and dark spots on the suture (which may fuse to form a broad dark sutural band merging with the scutellar spot). Usually also a small black spot near the middle or outside of the elytra.
Number of spots: Variable
Spot fusions: Sometimes
Pronotoum: As basic colour; sometimes with two small dark spots near the rear edge (these may be more extensive in some specimens).

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