Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
We had two... - Dorcasina matthewsi

We had two... - Dorcasina matthewsi
Monte Rio, Sonoma County, California, USA
July 18, 2011
Size: about 1"
Took this one to a nearby nursery - - no one there was able to ID it; and we've searched in
two book guides.

could you please try to take & post more pictures of it?
it would be nice to have good photos of this melanic form in thew Guide. thanks. =v=
Moved from ID Request.

challenging shot; best guess, Dorcasina matthewsi
a rather melanic var.; need sharper dorsal to be sure.
book guides usually cover about 0.1% of insect species present in the area

Dorcasina matthewsi
We don't believe our 'bug' is the one you mention, as the markings on its shell are quite different than that which is shown in other photos of the Dorcasina matthewsi. Also, our bug does not have such long antennae. Still seeking its name. Also if it's a beneficial insect in the garden, or not.

thank you.

Dorcasina matthewsi (LeConte, 1869)
This is a female specimen of this variable species. That explains the shorter antennae and the wider body. Everything else is indicative of this species. Most books would show the more typical color form and probably a male with its long antennae.

The beetles feed in Coast Redwood and Incense Cedar, and occur from coastal California to British Columbia. They've been recorded to visit various flowers, especially blackberry and the like.

Good or bad?
Thanks so much Dennis for the info. Are these creatures GOOD for the garden or BAD for the garden?

They have no impact on the ga
They have no impact on the garden other than as pollinators. They are native beetles who's larvae feed on dead wood in Coast Redwood.

we had two...
thanks, again, Dennis - - your info is spot on, and helps us decide what to do with her!
(the critter, that is).

thanks again, Dennis