Head small, margined, and armed with a long horn which bends upwards. Thorax dark brown and margined, having a very remarkable erect and black horn issuing from it, which bends forward towards the head, the extremity of which is trifurcate, hollowed beneath, and covered with a brown pile like that of velvet. Elytra brown, the margin and suture being black. Legs black. Thighs brown. Tibiæ with two spurs. Anterior tibiæ with three spines placed on the external part. HISTER (OXYSTERNUS) MAXIMUS. Plate XLVIII. fig. 4. ORDER: Coleoptera. SECTION: Clavicornes. FAMILY: Histeridæ. GENUS. HISTER, _Linn. &c._ (SUBGENUS: Oxysternus, _Erichson_.) HISTER (OXYSTERNUS) MAXIMUS. Depressus ater nitidus; elytris striatis, mandibulis exsertis capite longioribus. (Long. Corp. cum mandib. 1 unc. 3 lin.) SYN. Hister maximus, _Linn. Syst. Nat._ 1. 2. 566. 1. Hololepta maxillosa, _Park Mon. Hist._ III. 9. _t._ ix. _f._ 7. Hister maxillosus, _Drury_, _App. vol._ 2. Oxysternus maximus, _Erichson in Jahrb. der Ent._ 1. 100. O. maxillosus, _Guérin & Percheron Genera des Ins._ 1. _Col. pl._ 7. ([female]?) _Fabricius Ent. Syst. vol._ 4. _Append. p._ 437. _Schonh. Syn. Ins._ 1. _p._ 98. HABITAT: Cayenne. {73}Black. Head furnished with two horn-like mandibles, being thicker near the head, and terminating in a point; that fixed on the left side of the insect being longest. Thorax broad and margined. Elytra slightly striated. Scutellum not to be seen. Posterior tibiæ rather long. Tarsi short. PHANÆUS FESTIVUS [female]. Plate XLVIII. fig. 5. ORDER: Coleoptera. SECTION: Lamellicornes. FAMILY: Scarabæidæ. GENUS. PHANÆUS, _MacLeay_. Copris p. _Fabr._ Scarabæus p. _Linn._ PHANÆUS FESTIVUS. Thorace gibbo bicorni, capitis cornu erecto [male], elytris rubro-æneis; [female] thorace mutico æquali nigro-maculato, capite mutico. (Long. Corp. 1 unc. 1½ lin.) SYN. Scarabæus festivus, _Linn. Syst. Nat._ 1. 2. _p._ 552. 252. _Fabr. Ent. Syst._ 1. _p._ 42. _No._ 139. _Syst. El._ 1. 32. _No._ 10. _Oliv. Ent._ 1. 3. _p._ 110. _No._ 127. _t._ 3. _f._ 21. a. b. _De Geer Ins._ iv. _p._ 315. _t._ 37. _fig._ 3. [male]. 4. [female]. HABITAT: Cayenne. Head black, broad, rounded in front and margined. Thorax red and margined, having several black patches thereon. Scutellum not distinct. Elytra red and striated, being margined with black. Beneath black and shining. Legs thick and strong. COPRIS FAUNUS. Plate XLVIII. fig. 6. ORDER: Coleoptera. SECTION: Lamellicornes. FAMILY: Scarabæidæ. GENUS. COPRIS, _Geoffroy_. Scarabæus p., _Linn._ COPRIS FAUNUS. Thorace quadricorni, cornubus mediis brevissimis, lateralibus dilatatis, capitis cornu recurvo serrato. (Long. Corp. 1 unc. 9 lin.)