Uknown Beetle

I found a pair of these last year miles apart. This is the male. The female is completely black and has normal antennae. Both have good sized mandibles and were around 20mm. I haven't searched much for identification information but I've never seen this beetle before ever. Anybody familiar with these?

They are Cicada parasite (Genus Sandalus). Really interesting species

Larvae feed on Cicada nymphs.

That sure is an interesting catch! The body resembles a Cerambycid, but the antennae look like those of the Polyphylla sp. but it's an entirely different group!