Mixedgrass-prairie
Guides
Ageneotettix
slant-faced grasshoppers
Ageneotettix is a genus of slant-faced grasshoppers in the family Acrididae, established by McNeill in 1897. The genus contains at least three described species: A. brevipennis, A. deorum, and A. salutator. Species in this genus are characteristic inhabitants of western North American grasslands, where they serve as important components of grasshopper assemblages. Ageneotettix deorum, the white-whiskered grasshopper, is particularly notable for its widespread distribution and frequent dominance in mixedgrass prairie communities, where it has been recorded contributing over 50% of total grasshopper population density in some locations.
Ageneotettix deorum
white-whiskered grasshopper, white whiskers grasshopper, sand grasshopper
Ageneotettix deorum is a medium-sized slant-faced grasshopper widely distributed across North American grasslands. It is frequently the dominant species in mixedgrass and bunchgrass prairie outbreaks, reaching densities of 25 adults per square yard. The species exhibits early-season hatching with nymphal development spanning 40–48 days. Adults are ground-dwelling, diurnal herbivores that feed on grasses and ground litter. Population dynamics show sensitivity to weather and predation, with outbreaks typically building over 3–5 years followed by sudden crashes.
Arrhenopeplus brunneus
Bruner slantfaced grasshopper
Arrhenopeplus brunneus is a medium-sized, colorful grasshopper of the slantfaced subfamily Gomphocerinae, widely distributed in the hills and mountains of the northwestern United States. The species inhabits mixedgrass and bunchgrass prairies, mountain meadows, parklands, and alpine tundra at elevations from 1,600 to 11,100 feet. During population irruptions, it becomes a serious pest of mountain and foothill grasslands, capable of causing considerable damage to range grasses. The species exhibits a two-year life cycle in mountain meadows and northern grasslands, with hatching occurring in June and adults appearing in July or August depending on seasonal temperatures.
Aulocara femoratum
Whitecrossed Grasshopper, White Cross Grasshopper, White-crossed Grasshopper
Aulocara femoratum, commonly known as the whitecrossed grasshopper, is a medium-sized slant-faced grasshopper inhabiting western North American grasslands. It is a generalist grass feeder that occasionally reaches pest status in mixedgrass prairie habitats, though it is typically subdominant to its congener Aulocara elliotti. The species exhibits sexual dimorphism in both size and feeding behavior, with males being smaller and more mobile while females are larger and more sedentary. It completes one generation annually, overwintering as eggs.
Flexamia huroni
Huron River Leafhopper
Flexamia huroni is a leafhopper species in the family Cicadellidae, described by Bess & Hamilton in 1999. It belongs to the genus Flexamia, a group of leafhoppers known for their specialized host plant associations with grasses. The species is named after the Huron River in Michigan, where it was first collected. Like other members of the genus, it likely exhibits strong ecological dependence on specific grass host plants.
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