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Keith Bayless
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Containing group: Pachygastrinae


All known Zabrachia larvae are subcutaneous predators in coniferous trees (Rozkošný 1998). Z. polita is an associate and probably an important predator of Dendroctonus frontalis, the southern pine beetle.

Ten species of Zabrachia are found in North America, mostly Western North America, and Z. polita is the most widespread and common species. Five species are known only from the Neotropical region. Z. annulifemur is native to India. Z. madagascariensis is found only in Madagascar. Z. minutissima is found in Europe, Russia, and Uzbekistan, and 2 additional species are known from Eastern Europe and Russia. Z. occidentalis is known only from the Canary Islands (Woodley 2001).

Keys to the adults and known larvae of North American Zabrachia species are given in James (1965).


Zabrachia can be distinguished from other Nearctic Pachygastrinae by the following characteristics: R4 and R5 fused; arista bare or with short pubescence; frons not flattened dorsally; cell r3 shorter than pterostigma along costal margin (James 1981).


James, M.T. 1965. Contributions to our knowledge of the Nearctic Pachygasterinae (Diptera: Stratiomyidae). Ann. Entom. soc. Am. 58: 902-908.

James, M.T. 1981. 36. Stratiomyidae. Manual of Nearct. Dipt. 1: 497-511.

Rozkošný, R. 1998. Chapter 24. Family Stratiomyidae. Manual Palaearct. Dipt. 2: 387-411.

Woodley, N. E. 2001. A World Catalog of the Stratiomyidae (Insecta: Diptera). Myia 11: 1-473. Backhuys Publishers, Leiden.

Information on the Internet

Title Illustrations
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Scientific Name Zabrachia polita
Location Raleigh, Wake Co., North Carolina, USA
Acknowledgements From NCSU Insect Collection; Collected by W. Heck
Specimen Condition Dead Specimen
Identified By D. L. Stephan
Life Cycle Stage Adult
Image Use creative commons This media file is licensed under the Creative Commons Attribution-NonCommercial License - Version 2.5.
Copyright © Keith Bayless
About This Page

Keith Bayless
North Carolina State University, Raleigh, North Carolina, USA

Correspondence regarding this page should be directed to Keith Bayless at

All Rights Reserved.

Citing this page:

Bayless, Keith. 2008. Zabrachia. Version 29 September 2008 (under construction). http://tolweb.org/Zabrachia/108703/2008.09.29 in The Tree of Life Web Project, http://tolweb.org/

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