144 Mr. H. W. Bates on Geodephagous 



Ahacetus lioderes. 



Gracilis, facies Anchomeni, nigro-piceus, supra oenescens ; antenuis 

 articulo primo sanguiueo, palpis tarsisque fulvo-testaceis, fenio- 

 ribus tibiisque obscure nifo-testaceis ; svilcis frontalibus brevibus 

 versus oculum curvatis ibique profundioribus ; thorace angusto, 

 postice gradatim siuuato-angustato, angulis posticis exstautibiis, 

 iDasi Isevi ; elytris profunde usque ad apicem striatis, striis Isevis- 

 simis. 



Long. 51 millim. 



Colombo. 



Peculiar in this genus for its AncJiomenus-\ike forrrij the 

 thorax especially being more narrowly cordate than in other 

 species, having its greatest width at the anterior third, and 

 thence gradually and considerably narrowing to the base, 

 before which the sides are briefly and strongly sinuated, 

 causing the hind angles to project, though the base runs 

 obliquely up on each side towards the angle. The base of 

 the thorax has no trace of punctuation, the dorsal line does 

 not deepen near the base, and the space between the straight 

 and deep basal sulci and the margin is narrow and triangular. 

 The arcuated anterior transverse sulcus is rather strongly 

 marked ; the lateral margins are explanate-reflexed. The 

 elytral striaa have no trace of punctures. 



Ahacetus carinifrons. 



Supra totus Isete ?eueus, subtus castaneo-uiger, sulcis frontalibus rectis 

 usque ad oculorum margines posticos extensis et extus carina recta 

 marginatis ; thorace late quadrato-cordato, basi sat constricto, 

 angulis posticis rectis, inter sulculos basales grosse punctato ; 

 elytris striatis, interstitiis plauis ; antennis pedibusque piceis vel 

 rufescentibus, illis articulis 1-2 rufis. 



Long. Og millim. 



Colombo, in marshes. 



Belongs to Chaudoir's section iv. 1. b, with the difference 

 that the basal joint of the posterior tarsi is faintly sulcate on 

 the outer side. The third antennal joint is certainly glabrous 

 and not pilose, except the usual two or three bristles at the end. 



Ahacetus antiquus. 



Abacetus antiquus, Dejean, Sp. Gen. ill. p. 246 (Feronia) j Chaudoir, 



Essai Monogr. Ahacetus, p. 37. 

 Distri(/us submetallicus, Nietner, Ann. & Mag. Nat. Hist. 1858, ii. 



p. 177. 

 Argtdor rclmquens, Walker, Ann. & Mag. Nat. Hist. 1858, ii. p. 204. 



Colombo. 



