Key of Lasius

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Lasius spathepus

Lasius morisitai

Petiole in profile angulate at mid-length of anterior margin (Fig. 3.29a); standing hairs on pronotum much longer than the distance separating them (Fig. 3.30a); CI: around 100 Petiole in profile without such an anterior angle (Fig. 3.29b); standing hairs on pronotum short, as long as or shorter than the distance separating them (Fig. 3.30b); head relatively wide, CI greater than 104


Lasius spathepus Lasius morisitai

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