Tribes and genera of New Zealand Carabidae - Key to Migadopini genera

Source: FNZ 60
Mentum (Fig. 00): lateral lobes acute ?anteriorly; median tooth strongly bifid. 
Female (Fig. 8): last abdominal sternum and gonocoxae well visible dorsally. [South Island] ..... Taenarthrus
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Mentum (Fig. 00): lateral lobes rounded ?anteriorly; median tooth entire or slightly bifid. 
Female (Fig. 9: last abdominal sternum and gonocoxae not visible dorsally. [Subantarctic Islands] ..... Loxomerus
IMAGE [400 W x 225 H pix]