I added the bug's names, since there was a "unknown_species" tag...

The left insect:
http://betsyrodman.files.wordpress.com/2010/08/vinegaroon_samantha.jpg

The right one:
http://3.bp.blogspot.com/-ZXN8eBjT2-Y/UNRDhY2RFzI/AAAAAAAABE0/3jnZpcfTex0/s1600/Hercules+Beetle-2.jpg

Note: The hercules beetle can be grey too, also black