Leptotrachelus dorsalis

Ground Beetle
Leptotrachelus dorsalis

Identification:

Ground Beetle Leptotrachelus dorsalis came to moth lights May 29, 2013. Wheatley, Ontario.
Ground Beetle Leptotrachelus dorsalis came to moth lights May 29, 2013. Wheatley, Ontario.

Head: Head long, narrow, shiny black. Mandibles and whiskers (palpi) brownish-yellow.
Antenna: Brownish-yellow, segment 1 usually lighter.
Thorax (Pronotum): Long and narrow, narrower than head; reddish-black.
Wings (Elytra): Long, narrow; reddish-black with reddish-yellow wide stripe down each outside edge of wings, not reaching tip. About 10 long indented lines and ridges.
Legs: Brownish-yellow, slightly thickened. Toes long, 2 joints (bilobed).
Abdomen: Underside blackish.

Size: 7 to 8.5 mm.

Habitat: Forest edges, meadows and corn fields. Also found in wet areas with cattails and marsh grasses.

Food: Adults and larvae feed on moth larvae which use grass as their host plant (like the Corn Earworm Heliothis zea.)

Flight Time: May to July; possible again in late fall.

Life Cycle: Larvae live in grass leaf axils, including marsh grasses, sugarcane and corn. Adults over-winter under moist logs and wet leaves. One generation per year. Attracted to lights.

Comments: Essex County – Ojibway Prairies.

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