Key to the Melanoplus Species

Previous Step (D')

E Smaller branch of cerci on ventral side; hind tibiae red; plains and lower foothills, eastern Colorado.


Cercus
Melanoplus keeleri (Thomas)
See M. keeleri fact sheet from Dr. Pfadt's Field Guide to Common Western Grasshoppers



E' Smaller branch of cerci on dorsal side.
 
Go to F


F Smaller, male 15.5 mm, female 20 mm long; apex of subgenital plate not square as viewed from rear; ventral arm of cerci often comparatively straight, tip often rounded; hind tibiae blue; foothills of eastern Colorado, occasionally on eastern plains.
 
Back view of subgenital plate Cercus
Melanoplus infantilis Scudder


F' Larger, male 22 mm, female 24 mm long; apex of subgenital plate rectangular as viewed from rear; ventral arm of cerci strongly curved downward, tip narrowing to a point; hind tibiae red, blue or brown; mountains at moderate elevations; uncommon.
 
Back view of subgenital plate Cercus
Melanoplus alpinus Scudder
See M. alpinus fact sheet from Dr. Pfadt's Field Guide to Common Western Grasshoppers


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