Plateros sp..
Photo: 06/25/16, 11 pm.

Plateros is a genus of small to medium-sized Lycids (Net-winged Beetles), typically with dark elytra and some yellow/orange on margin of pronotum. This color pattern is shared with related genera. The species identification requires dissection. Vaguely similar looking fireflies are in the same superfamily Elateroidea.  
bug guide (this photo):