J. ent. Soc. Ont. 144, 2013
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Volume 144, 2013 I. FROM THE EDITOR [PDF] III. NOTES S.A. MARSHALL -- Ontario records of Sperchopsis tessellata (Ziegler), a rarely collected lotic water scavenger beetle (Coleoptera, Hydrophilidae) ... 113-114 [PDF] Ontario records of Sperchopsis tess ellata (Ziegler), a rarely collected lotic water scavenger beetle (Coleoptera, Hydrophilidae) S. A. Marshall School of Environmental Sciences, University of Guelph Guelph, ON N1G 2W1 email: samarsha@uoguelph.ca J. ent. Soc. Ont. 144, 2013 Abstract (Scientific Note) Sperchopsis LeConte is a distinctive monotypic eastern North American genus of water scavenger beetles including only S. tessellata (Zeigler), a rarely collected species restricted to the margins of cold, clear, rapidly flowing streams where it prefers undercut sandy or gravelly banks. Spangler (1961) reviewed the distribution and biology of S. tessellata, recording it from the Canadian provinces of Nova Scotia and Quebec as well as from localities throughout eastern United States. Smetana (1988), in his important review of the Hydrophilidae of Canada, provides only three Canadian collection records for S. tessellata: one from Nova Scotia, one from Quebec and one from New Brunswick. Roughley (1991) used Smetana’s review as the basis for a checklist of Hydrophilidae of Canada, but gave the known Canadian distribution of S. tessellata as Nova Scotia, Quebec and Ontario instead of Nova Scotia, New Brunswick, and Quebec. There are no Ontario specimens of S. tessellata in the Wallis-Roughley Museum of Entomology (University of Manitoba) so Roughley’s listing of Sperchopsis from Ontario was probably a lapsus. The relatively large (about 7 mm long), strikingly convex, pitted adults of this species are easily distinguished from other water scavenger beetles, so it is unlikely that it would be overlooked in collections or samples from aquatic insect surveys. The new Ontario records of Sperchopsis given below are based on the only known Ontario collections of the genus. |
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