Photo by Drees. Larvae are large C-shaped grubs like huge June beetles. There are many other species of scarab beetles in Texas. The name rhinoceros beetle has been used for this species as well as the close relatives. This is a dark brown species about 1 inch long and with a single long upright horn on the head of the males.
Females have a small tubercle instead of a horn.
Larvae feed on roots of ash trees. Immature stages look like very large white grubs and can be found in compost heaps or occasionally infest potting media. Larvae take most of the year to develop and spend the winter. Adult beetles are active in the summer. Mouthparts are for chewing.