Comprehensive Description

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Macrohabitat: Midlands to uplands, 900-2134 meters altitude, in open Pinyon pine-oak-juniper areas usually associated with huge granite boulder fields. Microhabitat: Adults are ground-dwelling on sandy to gravelly substrate. Dispersal abilities: Brachypterous, hence flightless thus vagility limited to walking or running; slow runners. Seasonal occurrence: Adult peak activity limited to the warm, wet monsoon season from June-September. Two specimens in NMNH were collected in February, 1972; on the north slope of Ramsey Canyon, AZ. Behavior: Adults are nocturnal, taking cover in the day (rarely) under stones, or in shallow self-constructed burrows, and particularly in rodent burrows. Adults are predaceous on large ground insects. They are gregarious. Larvae are very large and construct burrows in soft substrate under flat stones and at the bases of large stones and boulders. (Vaurie, 1955; Knisley & Pearson, 1984; Sumlin, 1991; Freitag, 1999; Larochelle & Lariviere, 2001; Pearson & Vogler, 2001; Pearson et al., 2006; Data from NMNH collection)


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© Erwin, Terry

Source: Western Hemisphere Caraboidea

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