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Australasian green shield bug - Glaucias amyoti (Dallas, 1851)

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(Native to New Zealand)

ADULT: Main diagnostic characters

[Glaucias amyoti]. SIZE: 12-17 mm (average 15 mm). COLOUR: Mostly green, sometimes with yellow, orange or brownish hue. © MWLR | CC BY-NC 4.0 Image
Glaucias amyoti. SIZE: 12-17 mm (average 15 mm). COLOUR: Mostly green, sometimes with yellow, orange or brownish hue. © MWLR | CC BY-NC 4.0
HUMERI (pronotum hind corners) rounded, not extended laterally, nearly in line with sides of abdomen. © MWLR | CC BY-NC 4.0 Image
HUMERI (pronotum hind corners) rounded, not extended laterally, nearly in line with sides of abdomen. © MWLR | CC BY-NC 4.0
SCUTELLUM (triangular shield) without markings along base. © MWLR | CC BY-NC 4.0 Image
SCUTELLUM (triangular shield) without markings along base. © MWLR | CC BY-NC 4.0
MESOSTERNAL CARINA (midline ridge underneath thorax between mid and hind legs) weakly developed. © MWLR | CC BY-NC 4.0 Image
MESOSTERNAL CARINA (midline ridge underneath thorax between mid and hind legs) weakly developed. © MWLR | CC BY-NC 4.0

NYMPH: Main diagnostic characters

Immature stink bugs or nymphs moult through five stages (instars) before becoming adults; the fifth stage or last instar nymph is shown below.

Image 1: [Glaucias amyoti] last instar nymph. © MWLR | CC BY-NC 4.0 Image
Image 1: Glaucias amyoti last instar nymph. © MWLR | CC BY-NC 4.0
Image 2: [Glaucias amyoti] last instar nymph. © MWLR | CC BY-NC 4.0 Image
Image 2: Glaucias amyoti last instar nymph. © MWLR | CC BY-NC 4.0

Image 1:  BODY LENGTH: About 9 mm. COLOUR: Head, thorax, wing pads greenish, lightly outlined with black; antennae black; abdomen greenish (paler in front) with 3 large transverse black plates near midline and thin, elongate, black marks along sides; legs dark.

Image 2:  BODY LENGTH: About 9 mm. COLOUR: Head, thorax, wing pads greenish amber, heavily outlined with black (thorax often nearly completely black); antennae black; abdomen yellowish green with 3 large transverse black plates near midline and oblong dark amber/black markings along sides; legs dark.