DYNASTES ÆGEON. Plate XXX. fig. 5. ORDER: Coleoptera. SECTION: Lamellicornes. FAMILY: Dynastidæ, _MacLeay_. GENUS. DYNASTES, _MacLeay_. Geotrupes, _Fabr._ Scarabæus P. _Linn._ Scarabæus, _Latreille_. DYNASTES ÆGEON. Rufus, thoracis cornu brevi incurvo subtus barbato, capitis recurvo subulato. (Long. Corp. 1 unc. 6 lin.) SYN. Scarabæus Ægeon, _Drury_, _App. vol._ 2. _Fabr. Ent. Syst. p._ 4. _No._ 4. _Syst. Eleuth._ 1. _p._ 5. _No._ 8. (Geotrupes Æg.) _Oliv. Ent._ 1. 3. _p._ 26. _No._ 26. _t._ 1. _f._ 4. _Jabl. Nat. Syst._ 1. _p._ 228. _No._ 6. _t._ 1. _f._ 4. _Sch. Syn. Ins._ 1. _p._ 4. _No._ 13. HABITAT: "In Indiis" (_Fabricius_). Peruvia (_Dejean._). Head small and black, from whence springs a horn that bends towards the body. Eyes red brown. Thorax red brown, with a black margin; having a short thick horn issuing from it, that inclines towards the head: it has also a faint black spot on each side. Scutellum black and triangular. Elytra red brown; the margins and suture being black. Abdomen black, covered with olive brown hairs. Legs black. Hinder and fore tibiæ with three short spines, placed on the external part of each; and with two spurs, those of the middle ones being shortest. Ungues having a single hair issuing from between the hooks, forked at the end. DYNASTES GERYON. Plate XXX. fig. 6. ORDER: Coleoptera. SECTION: Lamellicornes. FAMILY: Dynastidæ. GENUS. DYNASTES, _MacLeay_. Geotrupes, _Fabr._ Scarabæus P. _Linn._ DYNASTES GERYON. Thorace excavato tricorni; lateralibus compressis unidentatis; capitis recurvo sumplici. (Long. Corp. 1 unc. 7½ lin.) SYN. Scarabæus Geryon, _Drury_, _App. vol._ 2. _Fabr. Syst. Ent._ 1. _p._ 9. _No._ 21. _Syst. Eleuth._ 1. _p._ 11. _No._ 31. (Geotrupes G.) _Schonh. Syn. Ins._ 1. _p._ 10. 41. _Oliv. Ent._ 1. 3. _p._ 30. _t._ 24. _No._ 208. HABITAT: "In Indiis" (_Fabr._).