Xyloryctes

Morelli, Enrique & MorÓn, Miguel A., 2003, Descriptions of XYLORYCTES Hope Larvae with a Key to Species Based on the Third Stage Larvae (Coleoptera: Scarabaeidae: Dynastinae), The Coleopterists Bulletin 57 (3), pp. 289-295 : 290

Key to the Known Third Stage Larvae of Xyloryctes

1 Last antennal segment with 2 dorsal sensory spots. Cranial surface coarsely punctate. Maximum width of head capsule 7.4–8.3 mm. U.S.A. (Arizona, Illinois, Indiana, Kentucky, Massachusetts, Nebraska, New York, North Carolina, Texas, Wisconsin) and México (Coahuila, Hidalgo, Nuevo León, Puebla, Veracruz) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - X. jamaicensis (Drury)

1 9 Last antennal segment with 4 or 5 dorsal sensory spots. Cranial surface finely or sparsely punctate. Maximum width of head capsule 8.4–9.5 mm. U.S.A., México and Central America - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2

2 Acanthoparia formed by 14–15 curved, short, spine-like setae. Chaetoparia with 65–100 setae. Maxilla with 10 stridulatory teeth. Last antennal segment with 4 dorsal sensory spots. Maximum width of head capsule 9.5 mm. U.S.A. (Arizona, Utha, New Mexico, Texas), México (Chiapas, D.F., Durango, Guerrero, Jalisco, México, Michoacán, Morelos, Nayarit, Oaxaca, Sinaloa) - - - - - - - - X. thestalus Bates

2 9 Acanthoparia formed by 5–7 curved, short, spine-like setae. Chaetoparia with 23– 34 setae. Maxilla with 7–9 teeth. Last antennal segment with 5 dorsal sensory spots. Maximum width of head capsule 8.4–9.3 mm. México and Central America - - - - 3

3 Cranial surface irregulary punctate. Maxilla with 9 stridulatory teeth. Left mandible with stridulatory area elongated, length 3.0 times its width. Maximum width of head capsule 8.4 mm. México (Hidalgo, Puebla, Oaxaca, Veracruz) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - X. furcatus Burmeister

3 9 Cranial surface sparsely punctate. Maxilla with 7 stridulatory teeth. Left mandible with stridulatory area ovate, length 2.1 times its width. Maximum width of head capsule 9.3 mm. México (Chiapas, Oaxaca), Guatemala, El Salvador, Honduras, Nicaragua, Costa Rica, Panamá - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - X. lobicollis Bates