Synonyms and other taxonomic changes
Trimerotropis pseudofasciata Scudder, 1876, described from Santa Cruz Islnd, Santa Barbara County, California
Trimerotropis caeruleipennis Bruner, McNeill, 1901, from Umatilla, Washington
Circotettix pseudofasciatus (Scudder) Kirby, 1910
Slender with usually contrasting irregular dark bands crossing tegmina. Pronotum with crest high and bilobed on pronotum and often with tooth at lower rear angle of sides. Hind tibiae can be greenish, yellowish, or brownish, but are more typically bluish to blue. Wings clear or whitish to bluish (usually with at least some blue color near base), and often with at least a faint, ill-defined curved dark cross band.
T. salina, pallidipennis, and sparsa are similar, with pronotal crest lower toward front, without tooth on lower angle of sides, with yellowish hind tibiae. T. salina & pallidipennis have yellowish hind wings, and the dark band is always bold on the later, sometimes on the first. T. salina, pallidipennis, & pseudofasciata are often found together, and T. salina & pseudofasciata can be particularly confusing. T. sparsa has the dark band (when present) not evenly curved, but nearly straight on the inner side and narrowed at and forming a sharp angle with the spur that points toward the base. T. leucophaea is like T. sparsa except with hind tibiae blue.
T. cyaneipennis and T. occidentalis have shorter wings, lower front pronotal crest, no tooth on lower pronotum, and the dark band of the hind wings is consistently present (and shaped rather like that of T. sparsa). Wings of T. cyaneipennis are most often blue. While those of T. occidentalis are often more green or yellowish.
The species called "undescribed species A" here is similar, but smaller in size, and has wings yellowish to bluish; the pattern of the body and tegmina is more speckled and streaked with dark cross bands of the tegmina rarely as evident. The pronotum has sharp edges to the sides of the top, and no tooth at the lower rear angle of the sides; the front of the pronotum is not so elevated above. The dark band of the hind wing is ill-defined and weak, and shaped as in T. sparsa. The hind tibiae are not blue. These live in similar habitats through much of the Great Basin, and often they are together with T. psuedofasciata. They make harsher, more "crackling" sound in flight (rather like T. sparsa, leucophaea & cyaneipennis) that consists of pulses of two or three snaps, instead of longer buzz-like pulses.
Great Basin, Columbia Plateau, and valleys of California from eastern Washington and Idaho to northern Baja California and southwestern Utah. Records from eastern Utah and western Colorado are probably in error.
A wide variety of open dry habitats, but especially in dry barren flats with bare smooth ground exposed, often where the ground is alkaline or salty; can also be abundant in open gravelly areas, on hillsides, dune fields, vacant lots, and even parking lots.
Overwinter as eggs in soil. Adults appear late spring and usually gone by September or October.
Although wings are usually blue, this species is very close to the yellow-winged species of the T. pallidipennis group, and has very similar appearance and behavior to those species. It produces a rapid, relatively high-pitched, loud, and interrupted buzzing sound in flight. The flight is usually low, but fast and often erratic, and the insects are often very difficult to approach and to follow. Flights are usually short, but they can fly great distances.
Often attracted in large numbers, on warm evenings, to bright lights.