268 DYXASTIN-D. 



Type in the Uppsala University Museum ; that of Jdrhyi in the 

 British Museum, that of chiron in the Edinburgh Museum, of 

 Caucasus iu the Copenhagen Museum, and oi phidias in the Paris 

 Museum. 



Although it has been so long familiar and frequently described 

 and figured, I have been unable to find any information upon the 

 habits of this striking beetle, which is perhaps the largest insect 

 found in the Oriental Eegion. 



Genus EUPATORUS. 



Eupatorus, £ii)-m., Handb. Ent. v, 1847, p. 268 ; Lacord., Gen. 



Coleopt. iii, 18A6, p. 447. 

 Alcidosoma, Casteln., Revue Zool, 1867, p. 114. 



Type, Dynastes Jiarchvickei, Hope. 



Range. Tropical Asia and N. Australia. 



Form very convex. Clypeus bidentate. Eront angles of 

 prothorax rather sharp ; base scarcely lobed. Prosternum 

 without a free post-coxal process. Front tibia armed with three 

 strong sharp teeth set at right angles ; middle and hind tibise 

 bicarinate, finely spinose externally and slenderly digitate at the 

 end. Tarsi simple. Mandibles long, a little dilated at the base 

 externally and blunt at the extremity. Maxilla? densely fringed, 

 rather broad, not tapering, and broad and internally serrate at the 

 end ; palpi not very long. Mentum elongate-oval, rather tumid 

 beneath, with the anterior part slightly dilated : palpi very short. 



c? . Head armed with a recurved horn. Prothorax bearing one 

 or two pairs of horns. Legs longer than in the female. 



2 . More ovate, less convex, entirely unarmed. Legs rather 

 short. 



Key to the Species. 



1 (4) Upper surface more or less shining. 



2 (3) Elytra paler at the sides : J with short 



anterior prothoracic horns hardunckei, Hope, p. 268. 



3 (2) Elytra not paler at the sides : J with [p. 270. 



slender anterior prothoracic horns . . c/racUiconiis, Arrow, 



4 (1) Upper surface entirely opaque binnmiicus, Arrow, 



[p. 270. 



244. Eupatorus hardwickei. 



Dynastes hardwickei, Hope,* Gray's Zool. Misc. 1831, p. 22. 



? Eupatorus atkiusoni, Nonf., Deutsche Ent. Zeitschr. 1890, p. 89. 



Var. Dynastes cantori, Hope, Proc. Ent. Soc. 1842, p. 84 ; Trans. 



Ent. 'Soc. iv, 1845, p. 76. 

 Eupatorus cantori, Stebbiny, Jour)i. Bomb. Nat. Hist. Soc. xviii, 



1908, pi. 4, tip. 1. 

 Var. Dynastes childreui, Hope,* Gray's Zool. Misc. 1831. p. 22 (J 



minor). 



Black, with the lower surface and the femora dark chestnut, 

 and the elytra bright reddish yellow, except the extreme margins 



