DICRANOCEPHALUS. 33 



Key to the Groups of Cetoniixa 



1 (2) Iliud coxje and abdomen completely covered 



by the elytra Goliathidcs, p. 33. 



■2 (1) Hind coxao and abdomen partially visible 



from above. 



3 (8) Sides of the scutellum straight, convex or 



sinuous. _ [p. 35. 



4 (5) Base of the pronotum lobed in the middle . . Macronotides, 



o (4) Base of the pronotum not lobed in the middle [p. 67. 



(7) Base of the pronotum in a transverse line . . Heterorrhinides, 



7 (6) Base of the pronotum not in a transverse line Cetoniides, p. 108, 



8 (3) Sides of the scutellum concave, apex extremely 



sharp. 

 (10) Clypeus not forming two sharp angles in [p. 173. 



front ... O.vythyreides, 



10 (9) Clypeus forming two sharp angles in front . . Lomapterides, 

 ^ [p. 191. 



Group 1, Gouathides^ 



This group contains the well known African giants of the genus 

 GoliatJius and the peculiar Oriental genus Dicranocephalus, con- 

 sisting of four or five species, of which only one is Indian. 



Genus DICRANOCEPHALUS. 



Dicranocephalus, Westw., Arcana Eiit. i, 1841, p. 5. 

 Dicranocephalus, Hope, Gray's Zool. Misc. 1831, p. 24 (midescribed). 



Type, D. ivallicM, Hope. 



Range. N. India, Indo-China and China. 



Form rather short and broad, with a subglobose prothorax, 

 widest at the middle and contracted in front and behind, the hind 

 singles rounded and the base gently convex. Mesosternal epimera 

 distinctly visible from above but not reaching the dorsal surface. 

 Scutellum forming an equilateral triangle, with the sides straight 

 and the apex rather sharp. Elytra entirely covering the abdomen, 

 with their sides straight and the apical angles blunt. Middle coxae 

 separated by a narrow process, which is not produced forwards but 

 projects vertically downwards and is short and acutely pointed. 

 Labrum small, narrow and feebly bilobed. Mandibles very slight, 

 with the chitinous outer portion thin, scarcely projecting beyond 

 the broad membranous inner lobe. Maxillae very long and slender, 

 Avithout inner lobe, acute and bearing a very long hairy fringe at 

 the end. Mentum broad and bilobed. 



S . Sides of the clypeus produced into a pair of long branched 

 antlers projecting forward and curving backward at the tips. The 

 antennae (especially the basal joint) longer than in the $ , and the 

 front tibiae and all the tarsi very long, the former slender, slightly 

 incurved at the extremity and armed externally with three feeble 



D 



