Trimerotropis verruculatus Scudder

Adult female

Common name - Crackling forest grasshopper (Heifer, 1972).

Recent synonymy - Trimerotropis suffusa Scudder.

Geographic distribution - British Columbia and Alberta (Canada) to New Mexico, Arizona and California (Heifer, 1972). In Colorado it is found mostly from the mountain foothills to timberline (Hebard, 1929).

Colorado Distribution Map

Habitat - occurs in a wide variety of habitats at high and low altitudes, including forest and rocky areas (Heifer, 1972).

Food habits - a mixed feeder, preferring forbes; it feeds on lupine, yarrow and fescue (Banfill and Brusven,1973; Hewitt and Barr, 1967).

Nymph - five instars (Scoggan and Brusven, 1972)

Adult - medium size. General color is dark-brown to black. Face is vertical. Antennae are slender. Dorsal posterior margin of pronotum is a right angle. Tegmina are without bands and sometimes speckled. Wings are yellow, the apical half blackish. Hind femora are faintly banded on outer surface, more distinctly banded on the inner surface. Hind tibiae are blue to brown. Male length, 30 mm; female, 35 mm.

Seasonal history - eggs hatch in June, and adults are present from late July to mid-September (Alexander and Hilliard, 1969).

Abundance and importance - abundant throughout most of its range but has never been numerous enough to be considered an economic pest (Hewitt and Barr, 1967)

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Biology of Common Colorado Grasshoppers
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