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Western Conifer Seed Bug (Leptoglossus occidentalis)

Order: Hemiptera (he-MIP-ter-a) (Info)
Family: Coreidae
Genus: Leptoglossus (lep-toh-GLOSS-us) (Info)
Species: occidentalis


This bug has been reportedly found in the following regions:

Evergreen, Colorado
Bear, Delaware
Chicago, Illinois
Oakland, Maryland
Shirley, Massachusetts
Utica, Michigan
Salem, New Hampshire
Croton On Hudson, New York
Nichols, New York
Sodus, New York
Bowling Green, Ohio
Spencerville, Ohio
Headrick, Oklahoma
Pottstown, Pennsylvania
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Members' Notes:


On Jan 26, 2009, LadyAshleyR from Oakland, MD wrote:

When irritated this bug releases a horrid stench which can be related to the smell of stagnanting oranges. (At least that's what it smells like to me).
This odor will stick to your skin, and WILL NOT come off with soap. I definitely don't recommend trying to step on them, smash them, or touch them in any way, shape, or form.


On Jan 24, 2009, pmbrodsk from Utica, MI wrote:

I went and found some information about this bug when we found it inside in the dead of winter. I have never seen it before, but from what I read, it seems to be spreading up into Canada.

In the early spring these bugs move outdoors to nearby coniferous trees. The bugs feed on the developing seeds and early flowers of different species of conifers. Females lay rows of eggs on needles, which hatch in about ten days. Yound nymphs begin to feed on green cones and needles of pine and Douglas fir and pass through five stages until they reach adulthood by late August. The nymphs are orange and brown, becoming reddish brown as they develop. A... read more