Scarites: Big-Headed Ground Beetle

Here are two specimens of Scarites, a genus of large-headed black ground beetles. The chief characteristics of this kind of beetle are:

• Long, shiny black body
• Large mandibles (mouthparts) 
• Two large depressions on a big head
• Grooved elytra (wing cases), which are separated from the smooth pronotum by a peduncle (waist)

Further analysis must be done to determine the species. I found both specimens under bordering-bricks.

1. 

2.

References:
http://bugguide.net/node/view/2990 (info & pictures)
http://www.jstor.org/discover/10.2307/3999283?uid=3739896&uid=2&uid=4&uid=3739256&sid=21101645212371 (article)
http://www.cirrusimage.com/beetles-ground-scarites.htm
https://insects.tamu.edu/fieldguide/bimg130.html (info)