Dynastes hyllus Chevrolat, 1843 male, dorsal view	Dynastes hyllus Chevrolat, 1843 female, dorsal view
male, lateral view
female, lateral view Photos by Mathew R. Moore

Distribution: Mexico and Guatemala.

Description: Clypeal horn in male majors with a single, subtriangular tooth near apex (lateral view). Pronotum and elytra olive-green in males. Pronotum black and elytra olive-green in females. Elytra glabrous in both sexes.

Biological Data: Dynastes hyllus larvae have been found in association with avocado trunks (Persea americana Mill., Lauraceae) (Morón 1987). In captivity, D. hyllus seems to have two distinct life cycle options. Morón (1987) found D. hyllus have a short life cycle of approximately 675 days or a long life cycle of approximately 1109 days independent of humidity, temperature, and food availability.

Temporal Distribution: August-October, at lights during the night (Morón 1987).

Larvae: Morón (1987) described the third instar larvae.

References:
Endrödi, S. 1985. The Dynastinae of the World. Series Entomologica, Volume 28, W. Junk, Dordrecht. 800 pp., 46 plates.

Morón, M. 1987. Los estados inmaduros de Dynastes hyllus Chevrolat (Coleoptera: Melolonthidae: Dynastinae); con observaciones sobre su biologia el crecimiento alometrico del imago. Folia Entomologica Mexicana 72: 33-74.