I found this large (25 mm) beetle, Xyloryctes jamaicensis
, lying on its back on my street. It seemed unharmed, just unable to right itself on the smooth surface. This is a female, presumably, as most (if not all) males have a prominent horn. I seem to see mostly females in mid-summer, with most males found in spring (May). (Note that many scarabs and related beetles do have "minor males" that lack the armament, so the gender is something of a guess in this case.) Identification. The large size, elytral striations, sides fringed with hairs, and tibiae/tarsi are distinctive. There is only one species of this genus found in the eastern United States, with only two found in North America--see linked page on BugGuide.