Syn. Scarab. Titanus, Fabr. Ent. Syst. 1. p. 13. No. 36. Syst. El. 1. p. 13. No. 39. Jablonsk. Nat. Syst. 1. p. 282. t. 6. f. 2. ♂. Olivier, 1. 3. t. 5. f. 38.
Scarabæus Simson, Drury, App. vol. 2. (Exclus. Syn. Linn.)
Scarabæus major niger tricornis, Sloane Jamaica, vol. 2. t. 237. f. 4. 5.
The Great Brown Sawyer, Brown's Jamaica, p. 428. t. 43. f. 6.
Habitat: Jamaica.
Male. Head black. Antennæ dark brown. Thorax black, smooth, and shining, and armed with three horns; two of which, being about one-third of an inch in length, are placed on the upper part on each side, lying almost parallel with the body. Beneath these, near the head, rises another from the middle of the thorax, which is a little longer than the two first, bending upwards, and forked at the extremity. Elytra rather rough and furrowed, but shining and black. Tibiæ armed with spines, especially at the extremity, which facilitate the animal in its passage. Abdomen black; anus with a row of light brown hairs.
Female. Differs from the male chiefly in the thorax, which is entirely unarmed. Black and shining, but rather less so than the males; and in the front, just above the head, is a small impression. All the under parts of the insect which in the males are black, in this sex are of a dark reddish brown. In other circumstances it resembles the male.
DYNASTES GIDEON.
Plate [XXXVI]. fig. 5.
Order: Coleoptera. Section: Lamellicornes. Family: Dynastidæ, MacLeay.