38 Mr. Charles J. Gahan's Revision of 



with include all the Oriental Astatheinte, with the excep- 

 tion of Tropimetopa, Thorns., Eustathes, Newm., Ochrocesis, 

 Pasc, and Cyanastus Pasc, each of which contains not 

 more than one or two species. 



Genus Astathes. 



Astathes, Newm., The Entomologist, i, p. 299 (1842); 



Lacord., Genera des Coleopt., ix, p. 873. 

 Tetraqphthalme, Blanch., Hist, des Insectes, ii, p. 161 



(1845). 

 Tetraophthalmus, Thorns., Archiv. Ent., i, p. 48 (1857). 

 Type of the genus : Astathes perplexa, Newm. 



The characters of this genus have been given at full 

 length by Lacordaire, and need not be repeated here. It 

 will be sufficient to point out that the genus is chiefly 

 distinguishable from its allies by having the metasternal 

 process continued almost the whole way between the 

 middle coxas, with its anterior end resting upon the end 

 of the vertical mesosternum. The antennas always extend 

 up to or a little beyond the apex of the elytra in the 

 male ; the first joint is always shorter than the third, and 

 never asperate near the apex ; the second is scarcely 

 longer than broad, and the last joint is sharply pointed, 

 and usually glabrous, at the apex. The form and structure 

 of the prothorax, especially of its centronotal tubercle, 

 vary considerably and, taken in conjunction with certain 

 other characters, afford a good means of dividing the genus 

 into sections. 



The genus ranges over almost the whole of the Oriental 

 region, and is practically limited to that region, especially 

 if the island of Celebes be regarded as part of it. No 

 species, however, has been recorded from Ceylon, and 

 only one species is known to occur in Peninsular India. 

 The species of our first section are found only in the 

 Philippine Islands and Celebes; those of the second 

 section belong for the most part to the Indo-Chinese sub- 

 region ; while all the remaining species of the genus are 

 almost entirely confined to the Malayan sub-region. 



SECTION I. 



Prothorax with a rather strong conical tubercle on each side ; the 

 centro-dorsal gibbosity abruptly, but not highly, raised, flattened 

 above, narrower in front than behind, and impressed on each side 



