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........Xyloryctes Hope 1837: 90.
Xyloryctes ensifer
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| Oryctini Key |
Distribution: Species of Xyloryctes are found from southeastern Canada south to Panama, with most of the species occurring in Mexico and Guatemala.
Composition: The genus Xyloryctes has ten species (Endrödi 1976b, 1985a; Delgado and Najera-Rincon 1992).
Diagnosis: Species of Xyloryctes are recognized by the presence of tridentate protibiae, a bilobed and strongly reflexed clypeal apex, mandibles completely hidden by the clypeus, males with a frontal horn and females with a single tubercle, and a generally large pronotal cavity in the males and a convex pronotum in the females. Endrödi (1976b) provided the most recent synopsis of the genus.
Biological notes: Biological information and the larvae are known for X. jamaicensis (Drury) from the United States (Ritcher 1966; Stephan 1967; Ratcliffe 1991) and X. thestalus Bates from Mexico (Morón 1976), but similar information is lacking for the Central American species.
Literature cited:
Delgado, L. and M. Najera-Rincon. 1992. Especie y registros nuevos de Xyloryctes de México (Coleoptera: Melolonthidae; Dynastinae). Anales de Instituto de Biología de Universidad Autónoma de México (Serie Zoología) 63: 215-220.Endrödi, S. 1976b. Monographie der Dynastinae 5. Tribus: Oryctini (die Arten von Amerika) (Coleoptera: Melolonthidae). Folia Entomologica Hungarica (series nova) 29: 9-174.
Endrödi, S. 1985a. The Dynastinae of the World. Dr. W. Junk Publisher, Dordrecht. 800 pp., 46 plates.
Morón, M. A. 1976. Descripción de las larvas de tres especies mexicanas de melolóntinos (Coleoptera, Melolonthidae: Dynastinae y Rutelinae). Anales del Instituto de Biología, Universidad Nacional Autónoma de México 47 (Serie Zoología) 2: 119-134.
Ratcliffe, B. C. 1991. The scarab beetles of Nebraska. Bulletin of the University of Nebraska State Museum 12: 1-333.
Ritcher, P. O. 1966. White Grubs and Their Allies. Oregon State University Press, Corvallis, OR. 219 pp.
Stephan, K. 1967. Notes on the ecology of Xyloryctes jamaicensis (Coleoptera: Scarabaeidae) in southern Ontario. Michigan Entomologist 1: 133-134.
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