Grasshoppers of Wyoming and the West

Entomology

Key to the Trimerotropis Species

Previous Step (J')

K Large size, male over 30 mm long; antennae long; spur of wing bands absent to not reaching over one-fourth the distance from band to base.

Wing
Trimerotropis magnifica Rehn

[Hadrotettix trifasciatus (Say) sometimes will key to this point; it can be differentiated by the dark blue-black color throughout the inner face of the hind femora; T. magnifica with orange or red basal portion of the inner face of hind femora.]

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K' Not with above combination of characters.

Go to L

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L Inner face of hind femora orange; bands on tegmina discrete and narrow (fig. 282); median carina extremely reduced; inhabits rocky areas with little cover; widespread; locally common.

Tegmen
Trimerotropis pistrinaria (Saussure)

[Some specimens of Spharagemon equale and S. humile appear to have two notches in the median carina and may key to this point, but tegminal bands are wider and irregular or composed of spots.]

Tegmen of Spharagemon humile

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L' Inner face of hind femora yellow.
 

Trimerotropis tolteca Bruner

Tegmen and wing	Tegmen

[T. inconspicua from Arizona have orange hind tibiae. Such specimens could key to this point, but can be distinguished from T. tolteca by the width of the wing bands. The wing bands in T. inconspicua are narrow, often not much wider than the tegminal bands; in T. tolteca the wing bands are often twice the width of the tegminal bands.]

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