1      Head elongate, about 1.21 times as long as broad, juga sharp apically; antennae appearing short; hemelytral membrane grayish brown, veins brown (South Africa)

nervosa Dallas

-       Head much shorter and broader, blunter apically; antennae long and gracile; membrane and veins usually uniformly brown (except in bergrothi and schiodtei interruptevenosa)

2

2(1)  Body remarkably elongate; base of scutellum strongly swollen; pale areas of under surface of thorax finely and remotely punctate; venter, except in green spots, nearly impunctate

bergrothi Haglund

-       Body broad; base of scutellum only slightly elevated; under surface of thorax and at least sides of venter distinctly punctate

3

3(2)   Very dark; head dark reddish brown, very densely and uniformly punctate; lateral margins of pronotum blackish with only tips of humeral angles reddish brown

charon Linnavuori

-        Pale, distinctly variegated species; head more or less irregularly punctate

4(3)   Venter indistinctly sulcate; antennal segments 2-4 uniformly black; first and fifth joints yellowish brown

–      Venter with distinct median sulcus; antennal segments 2-4 not uniformly black

5(4) Fourth antennal segment black with whitish base; veins of membrane usually variegated with fuscous patches

–     Fourth antennal segment black with pale middle ring; membrane and veins always uniformly brown

6(5) Lateral margins of pronotum totally pale; entire venter punctate with brown

–     Basal part of lateral margins of pronotum black; middle of venter largely impunctate or provided with very obsolete concolorous punctures (South Africa)