Female fully winged. Body, antennae and legs brown, tarsi slightly paler, fore wings light brown. Head small, weakly prolonged in front of eyes; 2 pairs of ocellar setae present, pair III anterolateral to fore ocellus. Antennae 8-segmented; segment II weakly asymmetric with external margin broadly rounded; segments III–IV with sensorium simple and stout. Pronotum trapezoidal, 2 pairs of prominent posteroangular setae. Metanotum reticulate, sculpture forming arches around posterior midpoint; median setae not at anterior margin, smaller than lateral pair. Fore wings pointed; first vein distal half with 2 setae, second vein with 2 to 4 setae. Abdominal tergites medially with transverse sculpture lines; posteromarginal craspedum with weak lobes; ovipositor serrate. Posterior margin of sternites with tubercles.
Male effectively wingless, wing lobe minute; no ocelli; sternites III–VII with small circular pore plate.
C. falsus and C. simplex are here considered the same species. In contrast, zur Strassen (1967) interpreted the variation as representing two species, and Nakahara & Foottit (2012) distinguish these two in a key to17 species of Chirothrips from North America.. Currently there are 46 species worldwide in the genus Chirothrips. The key to species provided by zur Strassen (1960) treated the genus in a broad sense, whereas Bhatti (1990) created six new genera for these species, including Arorathrips for several species from the New World that have the mesothoracic endofurca reduced.
Chirothrips falsus Priesner
Breeding and pupating within individual florets of Poaceae.
Various Poaceae species with no clear specificity.
South western USA
California, Mexico, Arizona, Colorado, New Mexico, Texas, Iowa, North Dakota, Illinois. The record from Europe by Bailey (1957) is not supported (zur Strassen, 2003).