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Lepturinae
Brachyleptura dehiscens (LeConte, 1859)
Nomenclature
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Tribe: LepturiniGenus: Brachyleptura
Media
SUMMARY
Brachyleptura dehiscens (LeConte, 1859) is brown- to reddish brown with the males being smaller and more lightly colored than the females. The species can be distinguished from B. vexatrix with the following two characters: elytra truncate with the interior apical angles rounded, and antennae with the 5 outer segments expanded apically, (almost sub-serrate).
Range and Biology
B. dehiscens ranges from British Columbia to the Sierra Nevadas of northern California. Its host plant is known to be Pinus and has been reported on the flowers of Daucus , Spiraea, Angelica, Ceanothus, and Chrysolepis from July to August (Linsley and Chemsak, 1976: 171).
Notes
This species is apparently not commonly collected. The Oregon State Arthropod Collection holds only 26 specimens of dehiscens, compared with several hundred specimens of B. vexatrix. Of dehiscens, a small series (3 specimens) is present from the HJ Andrews Experimental Forest in Lane Co., Oregon, dating from August 1st -9th of 1973. These are attributed to the IBP Biome Survey of WP Nage and G Daterman, and were collected using a 'rotary net trap' at Clearcut Area #L107.
L&C report the flight period for dehiscens as July-August. The latest date on which a specimen in OSAC was taken is August 31, 1963 at 3000 ft. elevation near the Metolius River in Jefferson Co., Oregon.
References
- LeConte, J. L. 1859. Catalogue of the Coleoptera of Fort Tejon, California. Proc. Acad. Nat. Sci. Phila., 11:69-90.
- Linsley, E.G. and J.A. Chemsak. 1976. Cerambycidae of North America. Part VI, No.2. Taxonomy and Classification of the Subfamily Lepturinae. University of California Publications in Entomology 80, 186 pp.