Chrysolina americana

Authority: 

(Linnaeus, 1758)

Common name: 

Rosemary Beetle
Size: 6.7-8.1mm
Basic colour: Dark metallic green with metallic red markings
Pattern colour: Dark metallic green background; metallic red markings on pronotum, plus metallic red longitudinal stripes on elytra.
Number of spots: None
Pronotoum: Dark metallic green with metallic red markings
Leg colour: Red
Confusion species: Chrysolina cerealis

Chrysolina polita

Authority: 

(Linnaeus, 1758)
Size: 5.9-8.6mm
Basic colour: Metallic green with red-brown/orange-brown elytra
Pattern colour: None
Number of spots: None
Other colour forms: Rare
Pronotoum: Metallic green
Leg colour: Metallic green

Probably the commonest and most widespread British species of Chrysolina.

Size: 

5.8-9.4mm

Basic colour: 

Metallic purple

Pattern colour: 

None

Leg colour: 

Mostly as basic colour but tarsi paler orange-brown

Chrysolina sturmi

Authority: 

(Müller, O.F., 1776)

Size: 5.8-9.4mm
Basic colour: Metallic purple
Pattern colour: None
Number of spots: None
Pronotoum: As basic colour
Leg colour: Mostly as basic colour but tarsi paler orange-brown

Timarcha tenebricosa

Authority: 

(Fabricius, 1775)

Common name: 

Bloody-nosed Beetle
Size: 11-18mm
Basic colour: Blue-black
Pattern colour: None
Number of spots: None
Pronotoum: As basic colour
Leg colour: As basic colour
Confusion species: Timarcha goettingensis

The largest British chrysomelid, known for exuding a drop of red fluid from the mouth when alarmed.

Timarcha goettingensis

Authority: 

(Linnaeus, 1758)

Common name: 

Small Bloody-nosed Beetle
Size: 8-13mm
Basic colour: Shiny (at least slightly) - blue-black, violet-copper or black.
Pattern colour: None
Number of spots: None
Pronotoum: As basic colour
Leg colour: As basic colour
Confusion species: Chrysolina violacea
, Confusion species: Timarcha tenebricosa

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