Calosoma (Chrysostigma) cancellatum Eschscholtz, 1833

Calosoma cancellatum Eschscholtz, 1833: 23 (described from San Francisco)
Calosoma aenescens LeConte, 1854: 16 (described from Sacramento) syntype (from Fort Vancouver, Washington) in Museum of Comparative Zoology, Harvard University, Cambridge, Ma. (https://mczbase.mcz.harvard.edu/)
Tapinosthenes cancellatum Kolbe, 1895: 56
Calosoma esuriens Casey, 1913: 64 (described from San Diego, California); syntype in National Museum of Natural History, Washington (https://collections.nmnh.si.edu/)
Calosoma transversa Casey, 1913: 64 (described from San Diego, California); syntype in National Museum of Natural History, Washington (https://collections.nmnh.si.edu/)
Calosoma sagax Casey, 1920: 158 (described from Lassen Co., California); syntype in National Museum of Natural History, Washington (https://collections.nmnh.si.edu/)
Calosoma rectilatera Casey, 1920: 158 (described from Palm Spring, California); syntype in National Museum of Natural History, Washington (https://collections.nmnh.si.edu/)
Calosoma praestans Casey, 1920: 159 (described from Butte Co., California); syntype in National Museum of Natural History, Washington (https://collections.nmnh.si.edu/)
Calosoma (Tapinosthenes) cancellatum Breuning, 1927b: 90
Callisthenes (Tapinosthenes) cancellatus Lapouge, 1931: 377
Callisthenes (Tapinosthenes) cancellatus aenescens Lapouge, 1931: 377
Callisthenes (Tapinosthenes) cancellatus esuriens Lapouge, 1931: 377
Callisthenes (Tapinosthenes) cancellatus transversus Lapouge, 1931: 377
Callisthenes (Tapinosthenes) sagax Lapouge, 1931: 377
Callisthenes (Tapinosthenes) rectilaterus Lapouge, 1931: 377
Callisthenes (Tapinosthenes) praestans Lapouge, 1931: 377
Chrysostigma cancellatum Jeannel, 1940:166
Calosoma (Chrysostigma) cancellatum Gidaspow, 1963: 262
Callisthenes (Chrysostigma) cancellatus Erwin, 2007: 76


Length 15-22 mm. C. cancellatum is easily recognizable because of its sculpture of elytra of heterodynamic model in which the primary intervals are more raised and consist in series of aligned grains interrupted by foveae with a greenish bottom, the secondary and tertiary ones are confluent and dissolved in rough granules. The pronotum is transverse, not narrowed at the base, with relatively large rear lobes.
It is located on the western side of the Rocky Mountains from southern western Canada to California.

Examined specimens and literature’s data
Canada. British Colombia : Vernon (Lindroth, 1961: 53)
United States. Arizona (Burgess & Collins, 1917: 111); California: Stanton (SB), San Francisco (loc. typ., Eschscholtz, 1833: 23), Yolo County: Davis (MNHN), Garden Grove (AMNH), Compton (Burgess & Collins, 1917: 112), San Diego (sub esuriens and transversa, Casey, 1913: 64), Butte county (sub praestans, Casey, 1920: 159), Solano County (http://bugguide.net/), Humboldt county: Six Rivers National Forest (www.inaturalist.org/), Sacramento county: Cosumnes River Preserve (www.inaturalist.org/), Sacramento (sub aenescens, LeConte, 1854: 16), Los Angeles county (Montebello) (www.inaturalist.org/); Idaho: Coeur d'Alene (La Rivers, 1946: 136), Nez Perce county (UASM), Camas County (https://bugguide.net/ 1529242); Montana: Sanders County (https://bugguide.net); Nevada: Lander co., Mineral co., Washoe co. (La Rivers, 1946: 136); North Dakota: McHenry co. (Bousquet, 2012: 244); Oregon: Clemath County (AMNH), Belifountain, Corvallis (www.inaturalist.org/); Utah: Brigham (La Rivers, 1946: 136); Washington: Whitman county (UASM); Fort Vancouver (syntype of aenescens, https://mczbase.mcz.harvard.edu/), Spokane County (Newman Lake) (www.inaturalist.org).

Notes: Winged but wings partially underdeveloped, possibly unable to fly (Lindroth, 1961: 52). Adults are diurnal, active in sunshine but larvae are nocturnal and conceal themselves in leaf litter under plants during the day. It can be found in lowlands and midlands up to 1300m altitude, and lives on open ground, frequently on cultivated fields. Adults and larvae lives near the ground and are predators of lepidpterous caterpillars, but the adults also eat other insects as elaterids, flies and orthopterans. According to the data of the examined specimens, adult have been observed mostly in Spring (March-June) and should remain active up to September (Larochelle & Larivière, 2003: 175).
The description of larva in all stages and pupa has been given by Burgess & Collins (1917: 112).

Calosoma (Chrysostigma) cancellatum Eschscholtz, 1833 ♂
United States: Oregon, Clemath County, Bonanza,
16.V.1962 J D Vertrees
(coll. American Museum of Natural History, New York)
Calosoma (Chrysostigma) cancellatum Eschscholtz, 1833 ♀
United States: California, Stanton. VI, 20, 1927


updated March 30 2021

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