Cassida sanguinosa

Authority: 

Suffrian, 1844
Size: 5.9-8.0mm
Basic colour: Green
Pattern colour: Pale blood-red around scutellum (this is rarely absent)
Number of spots: None
Other colour forms: Rare
Pronotoum: As basic colour
Leg colour: As basic colour
Confusion species: Cassida denticollis
, Confusion species: Cassida prasina

Cassida rubiginosa

Size: 

6-8mm

Basic colour: 

Green or yellowish-green.

Pattern colour: 

Elytra sometimes with a small dark triangular spot around the scutellum, also usually a small dark spot near the suture.

Leg colour: 

As basic colour

Cassida rubiginosa

Authority: 

Müller, O.F., 1776

Common name: 

Thistle Tortoise Beetle
Size: 6-8mm
Basic colour: Green or yellowish-green.
Pattern colour: Elytra sometimes with a small dark triangular spot around the scutellum, also usually a small dark spot near the suture.
Number of spots: See 'pattern colour'.
Pronotoum: As basic colour
Leg colour: As basic colour
Confusion species: Cassida vibex

Cassida prasina

Authority: 

Illiger, 1798
Size: 5.2-6.5mm
Basic colour: Green or greenish-yellow
Pattern colour: Reddish spots (may be faint) at the front of the elytra.
Number of spots: 1 or 2
Pronotoum: As basic colour
Leg colour: As basic colour
Confusion species: Cassida denticollis
, Confusion species: Cassida sanguinosa

Cassida nobilis

Authority: 

Linnaeus, 1758
Size: 4.3-6.0mm
Basic colour: Yellow or pale green, sometimes yellow-brownish
Pattern colour: See notes below.
Number of spots: See notes below.
Other colour forms: Sometimes
Pronotoum: As basic colour
Leg colour: As basic colour, with basal half of femora black.
Confusion species: Cassida vittata

Cassida nebulosa

Size: 

5.5-7.7mm

Basic colour: 

Rusty-red, brownish or green

Pattern colour: 

Numerous small black spots, sometimes merging to form irregular longitudinal bands.

Spot fusions: 

Very common

Leg colour: 

As basic colour

Cassida nebulosa

Authority: 

Linnaeus, 1758
Size: 5.5-7.7mm
Basic colour: Rusty-red, brownish or green
Pattern colour: Numerous small black spots, sometimes merging to form irregular longitudinal bands.
Number of spots: Numerous, variable.
Spot fusions: Very common
Pronotoum: As basic colour
Leg colour: As basic colour

Cassida murraea

Size: 

6.5-9.0mm

Basic colour: 

Green or reddish-orange (green in less mature specimens)

Pattern colour: 

Small black spots, especially near the elytral suture.

Leg colour: 

Black - may be tinged with other colours.

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