A while back I noted that, at a rate of one beetle per week, I’d need about 10,000 years to get through all the described species. Since I made that comment we’re getting closer to needing only 9,999 years, but if the Coleopterists keep discovering new ones I’m not sure what I’ll do*. There are an awful lot of beetles.
In any case, this little Cerylonid is common under the bark of dead trees across eastern North America. Its diminutive size (only a couple millimeters long) makes it rather difficult to spot, so to find Philothermus you’ll want to watch for the shiny reflections off the beetle’s elytra.
Canon EOS 50D camera
Canon MP-E 65mm 1-5x macro lens
ISO 100, f/13, 1/250sec