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Species Horesidotes cinereus - Ash-gray Range Grasshopper

slant-face grasshopper - Horesidotes cinereus - female slant-face grasshopper - Horesidotes cinereus - female Ash-gray Range Grasshopper - Horesidotes cinereus - female Small brown speckled grasshopper - Horesidotes cinereus Gray-Brown grasshopper - Horesidotes cinereus - female Eritettix simplex ? female - Horesidotes cinereus - female Eritettix simplex ? female - Horesidotes cinereus - female Female Ash-gray Range Grasshopper? - Horesidotes cinereus - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Orthoptera (Grasshoppers, Crickets, Katydids)
Suborder Caelifera (Grasshoppers)
Family Acrididae (Short-horned Grasshoppers)
Subfamily Gomphocerinae (Slant-faced Grasshoppers)
No Taxon (Aulocara Group)
Genus Horesidotes
Species cinereus (Ash-gray Range Grasshopper)
Synonyms and other taxonomic changes
Horesidotes cinereus Scudder, 1899. Type locality: Palm Canyon, Palm Springs, California
Horesidotes papagensis Rehn & Hebard, 1908. Type locality: Tucson Mountains, Pima County, Arizona
Horesidotes cinereus saltator Hebard, 1931. Type locality: Tia Juana, Baja California Norte, Mexico [differs from species in having short wings]
Smallish, females roughly 1 inch (25 mm) long, males smaller; 19-25 mm (1)
Top of body grayish to brownish, usually speckled/mottle with darker; becoming darker, often nearly black on top half of sides. There is a prominent white diagonal stripe on the side of the thorax above the base of the hind leg. Paler, usually nearly or quite white below. Hind femur usually with dark triangular mark near middle on top (but may be broken, faint, or absent) and with "knees" not noticeably darker than remainder. Antennae are long (distinctly longer than head + pronotum in males) and somewhat thickened / sword-shaped. Head with lateral faveolae of vertex visible from above.
Very similar to Psoloessa texana, but more slender, with antennae longer and thicker, and with lower portion of lateral lobes of pronotum white. In P. texana, if the lower part of the lateral lobes are white, there is a white dash/lobe extending diagonally upward from the top of the white area (absent in Horesidotes, but always present in Psoloessa texana).
Can be confused with Acantherus piperatus, but that species is somewhat larger, and somewhat more slender; has lower portion of pronotal lateral lobes usually not white; Hind legs longer and more slender and often held splayed out to the side somewhat; hind tibiae usually reddish and black with a white ring near base (usually entirely grayish to brownish or bluish in Horesidotes); antennae usually with white tips (no white tips in Horesidotes).
Southern Arizona and California into northern Mexico. Should be watched for in sw. New Mexico.
Tends to favor openings in wooded rocky areas in desert mountains, especially along washes and arroyos, where it is usually assocated with grass and leaf litter. Sometimes associated with brush areas instead of woods, but otherwise areas are similar.
adults June-October (1)
Apparently not documented, but likely grasses.
Life Cycle
Probably overwinters as eggs, with adults in summer from June or July to frost.
Usually found on grass near cover of larger bushes or trees. Alert, and difficult to approach. Tends to jump into vegetation when flushed (especially tangles of low branches near ground), but can fly as well (usually also into cover of branches or brush).
Print References
Helfer, p. 170, fig. 276 (1)
Works Cited
1.How to Know the Grasshoppers, Cockroaches, and Their Allies
Jacques R. Helfer. 1962. Wm. C. Brown Company.