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Photo#251909
whitespotted sawyer beetle - Monochamus scutellatus - female

whitespotted sawyer beetle - Monochamus scutellatus - Female
Leavenworth National Fish Hatchery, Chelan County, Washington, USA
September 5, 2008
Meadow/open woodland near river, in afternoon. See other photo for length of antennae.

Images of this individual: tag all
whitespotted sawyer beetle - Monochamus scutellatus - female whitespotted sawyer beetle - Monochamus scutellatus - female

Moved
Moved from Monochamus.

Moving to Monochamus
Looks like many specimens confidently ID’d as Monochamus scutellatus (by white scutellum), but I can’t tell how to distinguish from http://bugguide.net/node/view/162258, confidently ID’d as Monochamus clamator. Clearly female (banded, relatively short antennae; heavily spotted).

M. scutellatus
Harry, thanks. Now that you point me to the right genus, the only other species that seems to have similar coloring is M. clamator, but it seems to be much less common. Wish I could sort a species by gender and location to evaluate your comment that it may be female.

 
The length of the antenna
is usually a good indicator for the sex of Cerambycids. Of course, I can't tell from your photo how long they really were.

 
length of the antennae
Margarethe, the other photo shows the antennae. They're out of focus and hard to see, but extend very nearly to the edges of the picture. One ends on top of the pebble in the lower right corner, the other on top of the bright orange grass blade.

Check Monochamus scutellatus
Pretty sure that's what it is. Dennis Haines or Dr. Thomas will know for sure. Maybe it's a female because I thought the males up your way have very little white on them.

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