Drymus brunneus (Sahlberg) (Hemiptera: Rhyparochromidae): a seed bug introduced into North America

G. G. E. Scudder, L. M. Humble, T. Loh


The occurrence of the adventive Drymus brunneus (Sahlberg) in North America is documented, and characteristics to distinguish this Old World species from D. unus (Say) are described and illustrated. A revised key to the Western Hemisphere species of Drymus is included.

Full Text:



Ashlock, P.D. 1979. A new Eremocoris from California with a key to North American genera of Drymini (Hemiptera-Heteroptera: Lygaeidae). Pan-Pacific Entomologist 55:149-154.

Ashlock, P.D. and A. Slater. 1988. Family Lygaeidae Schilling, 1829 (= Infericornes Amyot and Serville, 1843; Megodochidae Kirkaldy, 1988; Geocoridae Kirkaldy, 1902). The Seed Bugs and Chinch Bugs. Pp. 167-245. In T.J. Henry and R.C. Froeschner (eds.). Catalog of the Heteroptera, or True Bugs of Canada and Continental United States. E.J. Brill, Leiden.

Humble, L.M. 2001. Invasive bark and wood-boring beetles in British Columbia, Canada. Pp. 69-77. In R.I Alfaro, K.R. Day, S.M. Salom, K.S.S. Nair, H.F. Evans, A.M. Liebhold, F. Lieutier, M. Wagner, K. Futai and K. Suzuki (eds.). Protection of World Forests: Advances in Research. Proceedings XXI IUFRO World Congress. August 7-12, 2000, Kuala Lumpur, Malaysia. IUFRO Secretariat, Vienna. IUFRO World Series Volume 11.

Lindgren, B.S. 1983. A multiple funnel trap for scolytid beetles (Coleoptera). The Canadian Entomologist 115:299-302.

Péricart, J. 1998. Hémiptères Lygaeidae Euro-Méditerranéens. Volume 2. Systématique: Seconde Partie Oxycareninae, Bledionotinae, Rhyparochrominae (1). Faune de France. France et Régions Limitrophes. 84B:453 pp.

Scudder, G.G.E. and R.G. Foottit. 2006. Alien true bugs (Hemiptera: Heteroptera) in Canada: composition and adaptations. The Canadian Entomologist 138:24-51.

Slater, J.A. 1964. A Catalogue of the Lygaeidae of the World. Volume II. University of Connecticut, Storrs, CT. pp. 779-1668.

Slater, J.A. and H. Brailovsky. 1997. A new species of Drymus Fieber from Mexico, with a key to species and a checklist of Western Hemisphere Drymini (Hemiptera: Lygaeidae). Proceedings of the Entomological Society of Washington 99:37-41.

Southwood, T.R.E. and D. Leston. 1959. Land and Water Bugs of the British Isles. Frederick Warne & Co., Ltd., London & New York. 436 pp.


  • There are currently no refbacks.