unknown beetle - Xylotrechus schaefferi

After further review...

I've been asking around for help with this specimen. Here's what Bob Androw has to say:

"...that sure looks like X. schaefferi to me – it is definitely not X. convergens. I reared a short series of schaefferi last year and they vary in the intensity of the bands – one male was nearly immaculate."

Then he added in another email:

“Xylotrechus schaefferi differs consistently from X. convergens in color pattern. In X. convergens, the basal band is strongly arcuate and usually complete from the scutellum to the outer margin; the postmedian band is produced forward toward the suture; and the basal pronotal markings are produced obliquely in toward the disk. In X. schaefferi, the basal elytral band is rarely complete and not as arcuate on the outer margins; the postmedian band is nearly transverse; and the basal pronotal markings are confined to the hind angles. Also – X. convergens has the carina on the frons typical of the genus Xylotrechus, but X. schaefferi lacks this carina. Host plants are very different too – X. convergens develops in dead Crataegus (hawthorns) and X. schaefferi develop in the living cones of pines.”

… Brady Richards, 19 July, 2018 - 12:22am

Thanks for pursuing this and passing on clarifying information.

That and a more critical look at Linsley (1964) have eliminated my doubts.

… Skip Blanchard, 19 July, 2018 - 10:26am

Moved tentatively

Moved from ID Request.

Color pattern seems a good match for this species. See here:
https://apps2.cdfa.ca.gov/publicApps/plant/bycidDB/wdetails.asp?id=5115&w=n

… Brady Richards, 16 July, 2018 - 9:37am

I'm not persuaded. Look again at convergens.

… Skip Blanchard, 16 July, 2018 - 10:24am

Maybe Xylotrechus convergens?

… Skip Blanchard, 10 July, 2018 - 6:15pm

Unknown beetle

Thanks, sure looks like it.

… Brian ruffe, 10 July, 2018 - 8:48pm