Grasshoppers of Wyoming and the West
Entomology
Key to Acrididae Subfamilies
Previous Step (A')B Vertex and front meeting at an angle, face slanted back [this character is difficult
to discern in a few genera]; median carina of pronotum low; wings usually colorless;
antennae usually slightly flattened, sometimes strongly flattened.
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| Head and pronotum of Paropomala wyomingensis | Head and pronotum of Acrolophitus hirtipes | Head of Chorthippus curtipennis |
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| Head of Amphitornus coloradus | Head of Aeropedellus clavatus | Head of Ageneotettix deorum |
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{Note that in many cases the face only weakly slants back. Also note that occasionally, as in A. hirtipes, the median carina is raised.} |
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| Head of Stenobothrus brunneus | Head of Phlibostroma quadrimaculatum |
B' Vertex and front forming a rounded surface; face nearly vertical, not strongly slanted back; median carina of pronotum usually distinctly raised to form a sharp ridge; wings often brightly colored; antennae usually thread-like, not flattened. {Also, large, thick-bodied, without distinctly raised median carina; reduced tegmina spotted with black.}
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| Head of Trimerotropis pallidipennis | Head of Arphia pseudonietana |
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| Head of Metator pardalinus | Pronotum of Spharagemon collare |
