About Hemiphileurus illatus (LeConte, 1854)
As adults, Hemiphileurus illatus is solid black, with pitting across its thorax and elytra. Each of its six legs bears short spines. Adult body length ranges from 19 to 25 millimeters. Both sexes have a pair of horns, but female horns are much smaller, appearing more like bumps or short nubs. Unlike the closely related species Phileurus truncatus, neither sex of H. illatus has a distinct third horn. Larvae of this species have cream-colored bodies and reddish-brown heads, and maintain a C-shaped posture; when above ground, they move on their sides. Pupae are exarate, meaning they can move their abdominal segments. As pupation develops, the pupae's joints, faces, and leg tips change color from tan to dark brown. H. illatus is distributed in the Southwestern United States, primarily occurring in Arizona, Nevada, New Mexico, and California. It can be found in both urban and rural habitats.
