Agrilus cyanescens

Wood-Boring Beetle
Agrilus cyanescens

 

Metallic Wood-boring Beetle Agrilus cyanescens on Bush Honeysuckle at Point Pelee National Park, June 01, 2015.
Metallic Wood-boring Beetle Agrilus cyanescens on Bush Honeysuckle at Point Pelee National Park, June 01, 2015.

Identification: Uniformly dark blue to greenish-blue.

Head: Dark purplish-blue to dark blue-green. Face indented between eyes down to mouth. Sometimes with a whitish sheen on top of head.
Antenna: Gray, last half of segments steak-knife-like (serrated).
Thorax (Pronotum): Wide, dark blue to greenish-blue. No indented line down middle or raised ridges at sides. No hair. Base rounded, waved. Lower margin distinctly, deeply waved; a small V-shape in middle of margin. Sides curved slightly. Underside bluish-black, shiny.

Metallic Wood-boring Beetle Agrilus cyanescens on Bush Honeysuckle at Point Pelee National Park, June 02, 2015.
Metallic Wood-boring Beetle Agrilus cyanescens on Bush Honeysuckle at Point Pelee National Park, June 02, 2015.

Wings (Elytra): Wide, dark blue to greenish-blue. Base wavy, following contours of lower margin of thorax; outside corner areas depressed. Sides slightly constricted between mid and hind legs, then becoming wider; last 1/3 of wings tapering to slightly separated, somewhat rounded tips. No hair. Center of base margin (scutellum) very small, black, almost T-shaped.
Legs: Brownish-black.
Abdomen: Shiny black to bluish-black. Last segment rounded, some hairs at tip.

Size: 5.5 to 7 mm. Smallest of the blue Agrilus.

Habitat: Forest edges, around shrubs.

Food: Adult food unknown.

Flight Time: June to July

Life Cycle: Larvae develop in galleries under bark of Honeysuckle Lonicera & Diervilla species, Coral and Snowberry Symphoricarpos, Buckthorn Rhamnus.

Comments: Essex County – Point Pelee and Ojibway Prairies.
Kent County – Rondeau Provincial Park. Guelph, Toronto and north.
Exotic. Discovered in N. America (Wisconsin) in 1920, in Ontario in 1927. Has spread to Manitoba and Quebec.

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

Leave a Reply