Crotalus lepidus morulus I was lucky enough to get invited on a quick-hitting trip down to Mexico. And if you're going with a guy that wrote a book on Mexican lepidus, he better be able to show you lepidus... and he did :) Too bad I only brought my point and shoot camera. Nuevo Leon, MX. May 2015. I was then lucky enough to spot a female, too. Nuevo Leon, MX. May 2015. The two of them together showing sexual dimorphism. Nuevo Leon, MX. May 2015.