Answer: Bat bugs
Congratulations to all of my readers who got this right! I thought this might be a tricky case since bat bugs share many morphologic similarities with the ever-popular bed bugs. But most of you picked up on the subtle differences between the 2 arthropods.
As Blaine points out, "Given the length of the pronotal setae, they are bat bugs, Cimex sp. Cannot differentiate further without more geographic location (C. adjunctus in the east; C. pilosellus in the west)." Here are some web sites that highlight the important differences between these 2 bugs: BUGGUIDE and BADBEDBUGS