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For Insects, Spiders & Their Kin
For the United States & Canada
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Genus Calosoma - Caterpillar Hunters

Fiery Searcher - Calosoma scrutator Caterpillar Hunter Larva ? - Calosoma Calosoma externum - Narrow Searcher - Calosoma externum C.angulatum? - Calosoma Caterpillar hunter - Calosoma Black caterpillar hunter - Calosoma Green Beetle - Calosoma Calosoma sayi
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Adephaga (Ground and Water Beetles)
Family Carabidae (Ground Beetles)
Subfamily Carabinae
Tribe Carabini
Genus Calosoma (Caterpillar Hunters)
Other Common Names
Searchers, along with genus Carabus. Both of these are in the tribe Carabini.
Synonyms and other taxonomic changes
taxonomy in the guide follows Erwin (2007) and Lorenz (2005), not(1)
Explanation of Names
Calosoma Weber 1801
From Greek kalos (καλος) 'pretty, beautiful' + soma (σωμα) 'body'(1)
18 spp. in 7 subgenera in our area(1):
subgenus Castrida: sayi
subgenus Calosoma: frigidum, sycophanta
subgenus Calodrepa: aurocinctum, scrutator, *splendidum, wilcoxi
subgenus Camegonia: marginale, parvicolle, prominens
subgenus Carabosoma: angulatum, *eremicola, peregrinator, *sponsa
subgenus Callitropa: externum, macrum, protractum
subgenus *Blaptosoma: *haydeni (2 sspp.)
ca. 25-35 mm
keys in(2)
worldwide, incl. much of NA, more diverse in the south
Print References
Burgess A.F., Collins C.W. (1917) The genus Calosoma, including studies of seasonal histories, habits, and economic importance of American species north of Mexico and of several introduced species. USDA Bur. Entomol. Bull. 417: 1-124. Full text
Erwin, T.L. 2007. A treatise on the Western Hemisphere Caraboidea (Coleoptera): their classification, distributions, and way of life. Volume I (Trachypachidae, Carabidae - Nebriiformes 1). Pensoft, Sofia-Moscow. 323 pp. + 22 pls.
Internet References
Works Cited
1.Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico
Bousquet Y. 2012. ZooKeys 245: 1–1722.
2.North American caterpillar hunters of the genera Calosoma and Callisthenes (Coleoptera, Carabidae)
Gidaspow, T. 1959. Bulletin of the American Museum of Natural History 116: 225-343.
3.Bruschi C. (2010) Calosoma of the world