Chromagrion Needham, 1903
Chromagrion conditum (Hagen in Selys, 1876) - Openwing Damsel

Notes - References
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Notes on Chromagrion conditum in Michigan


Distribution of Chromagrion conditum in Michigan, based on MOS records. Click on map for larger image

A monotypic genus, the dark larvae of C. conditum are easily distinguished by their angular posterolateral head, narrow legs, and dark, white-mottled and eventually white-tipped caudal gills (Walker 1953, Westfall and May 1996). Widely distributed in Michigan (more common in the LP than the UP), larvae are found in unpolluted spring-fed brooks with ample riparian shading as well as clean ponds and lakes, clinging to submerged vegetation, leaves and other debris (Needham and Heywood 1929, Garman 1927). Larvae emerge from late May through June.


Garman, P. 1927. Guide to the Insects of Connecticut, Part V : The Odonata or Dragonflies of Connecticut. Connecticut Geological and Natural History Survey Bulletin 39, 331 pp.

Needham, J. G. 1903. Aquatic insects of New York State. Part 3. Life histories of Odonata, suborder Zygoptera. New York State Museum Bulletin 68:218-279.

Needham, J. G., and H. B. Heywood. 1929. A Handbook of the Dragonflies of North America (Anisoptera). C. C. Thomas: Springfield, Illinois. 378 pp.

Selys-Longchamps, M. E. de. 1876. Synopsis des agrionines, cinquième légion: Arion (suite). Le genre Agrion. Bulletin de l'Académie royale des Sciences de Belgique (2) 41:247-322, 496-539, 1233-1309 (reprint 1-199).

Walker, E. M. 1953. The Odonata of Canada and Alaska, Vol. 1. University of Toronto Press: Toronto, Ontario. xii + 292 pp.

Westfall, M. J., and M. L. May. 1996. Damselflies of North America. Scientific Publishers: Gainesville, Florida. x + 650 pp.