Key to Subfamily Gomphocerinae
Previous Step (F)
G Lateral carinae
of pronotum well marked by structure; hind femora with dark bands on outer
face; tegmina with large rectangular cells in marginal field, especially
in males; dark areas on dorsal pronotum and on lateral lobes; uncommon;
central mountains of Colorado.
[Hind tibiae of specimens of Psoloessa spp. from Arizona
occasionally are orange; Psoloessa lacks large rectangular cells
on tegmina and has dark spots largely confined to a longitudinal central
row; spots on tegmina of Stenobothrus are scattered.]
Stenobothrus brunneus (Thomas)
|Top view of pronotum
See S. brunneus fact sheet from Dr. Pfadt's
Field Guide to Common Western Grasshoppers
G' Lateral carinae
of pronotum absent, or marked by color but not by structure.
Go to H
Lateral carinae of pronotum well marked by color but not by structure;
hind femora usuallywithoutdark bands on outer face; rectangular cells rarely
present in marginal field of tegmina; but many cells of tegmina regularly
quadrilateral; pronotum rarely with dark areas; wings colorless; widespread
and abundant, especially in eastern Colorado.
[Phlibostroma quadrimaculatum may key to this point if the
lateral foveolae of vertex are determined to be visible from above. The
three or four large, distinct, dark spots on the tegmina will indicate
H' Lateral carinae
absent; hind femora usually with bands on outer face; cells of tegmina
irregular in shape; pronotum may be dark brown; wings may be pale blue
or colorless; widespread in eastern Colorado but usually not abundant.
Grasshoppers of Colorado Contents