DYNASTINtE. 



261 



4 (3) Elytra of S very shining, of 2 rugose 



male bearing paired thoracic horns. [p. 265. 



5 (6) Surface metallic Chalcosoma, 



6 (5) Surface not metallic Eupatorus, p. 268, 



7 (2) Legs of the (S not elongate Pachyoryctes, 



8 (1) Basal joint of the hind tarsus more or less [p. 272. 



triangular. 



9 (18) Prosternum not forming a free erect pro- 



cess behind the front coxae. 



10 (15) Clypeus truncate or bi-anpulate. 



11 (12) Propygidium bearing stridulatory ridges . Oryctes, p. 273. 



12 (11) Propygidium not bearing stridulatory 



ridges. 



13 (14) Mandibles not dilated externally at the [p. 281. 



base Trichogomphus, 



14 (13) Mandibles dilated externally at the base. Dichodontus, 



15 (10) Clypeus acuminate. [p. 284. 



16 (17) Body short and convex ; front tibia 4- 



dentate Blabephorus, 



17 (16) Body long, not very convex ; front tibia [p. 286. 



3-dentate Eophileurus, 



18 (9) Prosternum forming a free erect process [p. 287. 



behind the front coxae. 



19 (30) Hind tibia not contracted. 



20 (21) Hind tibia digitate at the extremity .... Clyster, p. 293. 



21 (20) Hind tibia truncate at the extremity. 



22 (29) Mandibles deeply notched externally : 



sexes similar. 



23 (26) Propygidium bearing two longitudinal 



stridulatory files, [p. 294. 



24 (25) Pronotum not visibly punctured Heteronychus, 



25 (24) Pronotum strongly punctured Alissonotum, 



26 (23) Propygidium without stridulatory files. [p. 298. 



27 (28) Front tibia irregularly toothed Pentodon, p. 302. 



28 (27) Front tibia regularly toothed Microryctes, 



29 (22) Mandibles not notched externally : sexes [p. 304. 



dissimilar Phyllognathus, 



30 (19) Hind tibia contracted, strongly dilated [p, 306. 



from base to extremity. 



31 (32) Propygidium bearing two longitudinal 



stridulatory files Podalgus, p. 309, 



32 (31) Propygidium produced and broadly striated Dipelicus, p. 310, 



The genus Stypotrupes is omitted here, although one of its 

 species, S. telnmon, Burm,, is said by its author to inhabit 

 " Hinterindien," This expression probably covered an area much 

 greater than the part ot' the Indo-Chinese Peninsula with which 

 this work is concerned, and S. telamon is represented only by a 

 fragment which I have not seen. A second specimen, mentioned 

 by Burmeister as in the Paris Museum, seems to have since 

 disappeared. 



