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Species Calosoma sayi - Black Caterpillar Hunter Beetle

Black Caterpillar Hunter - Calosoma sayi Calosoma sayi - male Black Caterpillar Hunter - Calosoma sayi Calosoma sayi - female Cat Hunter? - Calosoma sayi Calosoma sayi Calosoma sayi Calosoma sayi - female
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 Hunter Beetles)
No Taxon (Subgenus Castrida)
Species sayi (Black Caterpillar Hunter Beetle)
Synonyms and other taxonomic changes
treated as C. alternans sayi in(1)
Explanation of Names
Calosoma sayi Dejean, 1826
sayi = named after Thomas Say, a prominent American entomologist and naturalist of the early 19th century
25-28 mm
Large, black, with prominent gold or red punctures and blue or green margins of elytra. (These are not prominent on cursory inspection--the beetle appears all black.) Resembles C. calidum but larger (25-28 mm vs. 16-27 mm) and more southern in distribution. Quoting from Ciegler (2000) (2):
Pronotum with setigerous puncture near hind angle; lateral raised bead of pronotum sharply defined inwardly for its entire length---> C. sayi
Pronotum without basal setigerous puncture but with usual lateral one at midline; lateral bead obscure, at least basally ---> (C. externum, C. calidum)
mostly e. US (NY-FL to IA-KS-TX-CA) to Guatemala; W. Indies - Map (3)(4)
Deciduous forests, grasslands, cultivated land, beaches.
mostly: May-Oct. (BG data)
Predatory on other insects, especially caterpillars
Life Cycle
Eggs laid singly in soil. Larvae live in soil and overwinter. Adults may live 2-3 years.
Adults come to lights
our only member of the neotropical subgenus Castrida that includes 14 spp., of which one ranges into the Nearctic(3)