Chalcosyrphus chalybeus

Flower Fly
Chalcosyrphus chalybeus

 

Flower Fly Chalcosyrphus chalybeus female on Astilbe. June 07, 2007. Wheatley, Ontario.
Flower Fly Chalcosyrphus chalybeus female on Astilbe. June 07, 2007. Wheatley, Ontario.

Identification:
Head: Face with some white pile. Male eyes meet at top of head before simple eyes (ocelli). Female top of head black between eyes.
Antenna: Black, 3rd joint more brownish, long and wide.
Thorax: Shiny steel blue-black with some short black pile. Shoulders (base outside edges or humeri) lightly dusted with white pile. Thorax side black.

Flower Fly Chalcosyrphus chalybeus female on Viburnum. June 12, 2008. Wheatley, Ontario.
Flower Fly Chalcosyrphus chalybeus female on Viburnum. June 12, 2008. Wheatley, Ontario.

Wings: Metallic steel-blue to black. Inside edge of wings and tip pale purplish.
Legs: Black with short, bristly hair. Hind thigh (femur) much wider.  Hind shin (tibiae) slightly curved.
Abdomen: Metallic steel-blue to black with short black hair.

Size: 12 mm.

Habitat: Forests and swamps.

Flower Fly Chalcosyrphus chalybeus female on Astilbe. June 07, 2007. Wheatley, Ontario.
Flower Fly Chalcosyrphus chalybeus female on Astilbe. June 07, 2007. Wheatley, Ontario.

Food: Adults feed on flower nectar.

Flight Time: June and July

Life Cycle: Unknown. One report of larvae in wet logs of Maple.

Comments: Essex County – Point Pelee, Lake Erie Islands, Ojibway Prairies. Kent County – Rondeau Provincial Park. Georgian Bay area. Also in Michigan.

Synonyms: Wiedemann 1830
Xylota chalybea, Xylota purpurea, Xylotomima chalybea, Xylotomima chalybeus 

References:
List of Specimens of Dipterous Insects in the collection of the British Museum, 1849, Pt. III by Walker, pg. 560.
United States National Museum, 1886, Vol. 31: Syrphidae by Williston, pg. 233.
Ohio State University, 1953: Thesis on Syrphidae by Weems, pg. 382.
Proceedings of the Entomological Society of Washington, 1982, Vol. 84, by Maier, pg. 605.
Journal of the New York Entomological Society, 1988, Vol. 96, by Thompson, pg. 222.

Types:
Holotype as Xylota purpurea by Walker 1849. Type Locality: U.S. In the British Museum of Natural History, London, England.

 

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