Texas Beetle Information

Return to Texas Entomology - Compiled by Mike Quinn

Blue-margined Ground Beetle

Pasimachus elongatus LeConte

Family Carabidae, Subfamily Carabinae, Tribe Scaritini


(note large mandibles that are characteristic of this tribe)

Henryetta, Okmulgee Co., Oklahoma
August 7, 2003 (Charles Schurch Lewallen)

Range: Extends northward into the southern part of the Canadian prairie provinces  (Arnett & Thomas, 2000).

Similar Species: There are 11 Nearctic species of Pasimachus (Arnett & Thomas, 2000), most of the species are margined with blue.

Texas Taxa:

Pasimachus californicus Chaudoir 
Pasimachus depressus
Pasimachus duplicatus
Pasimachus elongatus
Pasimachus punctulatus

Photos: Pasimachus elongatus, the blue-lined ground beetle - Dan Johnson


Alexander, R.D. 1959. The courtship and copulation of Pasimachus punctulatus Haldeman (Coleoptera: Carabidae). Ann. Entomol. Soc. Am., 52: 485.

Arnett, R.H. Jr., & M. C. Thomas. (editors). 2000. American Beetles, Volume I: Archostemata, Myxophaga, Adephaga, Polyphaga: Staphyliniformia.
CRC Press. 464 pp.

Banninger, M. 1950. The subtribe Pasimachina (Coleoptera, Carabidae, Scaritini). Revista de Entomologia, 21(3): 481-511.

Davidson, B. S., T. Eisner, B. Witz & J. Meinwald. 1989. Defensive secretion of the carabid beetle Pasimachus subsulcatus. Journal of Chemical Ecology 15(6): 1689-1697.

Choate, P.M. 2001. Manual for the Identification of the Ground Beetles (Coleoptera: Carabidae) (including tiger beetles) of Florida. University of Florida, Gainesville. Pre-publication manuscript. 90 pp.

McCullough, B.T. 1972. Analysis of the defensive scent fluid of Pasimachus elongatus (Coleoptera: Carabidae). Ann. Entomol. Soc. Am. 65:772.

Thompson, R.G. & R.T. Allen. 1974. Descriptions of larval Carabidae. The Coleopterists Bulletin, 28(4): 185-201. 

Weeks, R.D., Jr. & N.E. McIntyre. 1997. A comparison of live versus kill pitfall trapping techniques using various killing agents. Entomologia Experimentalis et Applicata, 82(3): 267.

White, R.E. 1983. A Field Guide to the Beetles of North America. Houghton Mifflin Company, Boston. 368 pp.

18 Jan 2007  © Mike Quinn / Texas Entomology / Texas Beetles / Texas Beetle Photos /