Agrilus subcinctus

Metallic Wood-boring Beetle
Agrilus subcinctus

 

Metallic Wood-boring Beetle Agrilus subcinctus on Ash. June 08, 2010, Wheatley, Ontario.
Metallic Wood-boring Beetle Agrilus subcinctus on Ash. June 08, 2010, Wheatley, Ontario.

Identification:
Head: Male bronzy-green, female more brownish. Deep depression or indent from top of head to mouth. Face with some white hair.
Antenna: Blackish-bronze. Segments steak-knife-like (serrated) from 5th to tip.
Thorax (Pronotum): Metallic bronze with blackish areas. Base and side margins slightly arched across center. Lower margin wavy, outside corners pointed. Underside darker, shiny with white hair.

Metallic Wood-boring Beetle Agrilus subcinctus on Ash. June 08, 2010, Wheatley, Ontario.
Metallic Wood-boring Beetle Agrilus subcinctus on Ash. June 08, 2010, Wheatley, Ontario.

Wings (Elytra): Blackish-bronze with white to creamy pile patches covering either the entire first half of wings, or as four to six small, oblong spots in same area. Two more slanted white to creamy pile marks near tip of each wing. Center of base margin (scutellum) black, triangular. Tips wide, rounded.
Legs: Black-bronze. Shins (tibiae) narrow.
Abdomen: Underside bronze with some whitish hair.

Metallic Wood-boring Beetle Agrilus subcinctus on Ash. June 08, 2010, Wheatley, Ontario.
Metallic Wood-boring Beetle Agrilus subcinctus on Ash. June 08, 2010, Wheatley, Ontario.

Size: 4 to 4.5 mm.

Habitat: Forest edges and meadows.

Food: Adults feed on foliage of a variety of trees and shrubs including poison ivy and privet hedges.

Flight Time: Late May to mid-August; peaks in June.

Life Cycle: Females lay eggs on dead twigs of Ash Fraxinus trees in late May to early June on bark of dead twigs. Larvae make U-shaped tunnels under the bark. Overwinters as larvae, pre-pupa or pupa.
Parasites: Chalcid Wasps Eurytoma species; Braconid Wasp Ecphylus species, Heterospilus.

Comments: Essex County – Point Pelee, Lake Erie Islands, Ojibway Prairies. Lambton County and District of Sudbury. Grimbsy.

For information on synonyms, references and type specimens see next page

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