Acylomus sp..
Photo: 03/17/16, 9 pm.

This Shining Flower Beetle is Acylomus sp. The genus has 20 species in North America, of which several have been collected from dead leaves and seed clusters of various trees. Larvae and adults are likely to feed on molds growing on those drying leaves. Adults are usually night active and hide during the day. 
bug guide (this photo):
Wheeler & Blackwell (Eds), Fungus-Insect Relationships: