tJie Seychelles Islands and jildahra. 171 



of tlio mandibles black, subopaque, tlie bead sliininp^, tliickly 

 clothed with ratlicr coart^e pallid pul)csceuce. Head mode- 

 rately produced ill front, the epistoma rather long;, coarsely, 

 closely ])unctate ; eyes large ; mandibles eacb bifid at the 

 tip ; antennae not reaching the apex of the elytra, joints 3 

 and 4 subequal in length, 11 feebly constricted at the middle. 

 Prothorax considerably longer than broad, snbcordate, 

 narrow, densely, coarsely, subconflnently punctate, broadly 

 depressed and subfoveate on each side of the disc anteriorly. 

 Elytra long, nearly twice as wide as the prothorax, somewhat 

 convex, closeh'^, finely, scabroso-punctate, each with two 

 distinct costse on the disc and another near the outer margin, 

 all three extending from the base to near the apex. 



cJ . Sixth (hidden) ventral segment divided into two 

 narrow, curved, concave, forcipiform lobes, the corresponding- 

 dorsal segment similarly shaped ; sedeajius long, rather 

 stout, gradually widened towards the tip, the latter rounded, 

 lateral lobes very long, slender, and feel)ly carved. 



Leng h 8-12 mm. ((^ ? .) 



Loc. Aldabra (1908-9, Fryer). Sevchelles : Round 

 I.vland (Mus. Brit.). 



Found in abundance at Aldabra, in several parts of the 

 atoll. In the British Museum there are also two females 

 and a male of the same species from Round Island. Very 

 few males are contained in the long series before me; three, 

 hoAvever (including the one from Round I.) have been 

 identified, and their genital armature examined. The bifid 

 mandibles, the densely, rather coarsely punctured, dull, sub- 

 liifoveate, narrow prothorax, and the finely punctate, more 

 distinctly costate elytra, readily separate A. aldabruna from 

 Oxacis [Ananca) grisescens, Fairm. A. (Sessinia) andrewsi. 

 Arrow, from Christmas Island, under which two sj)ecics 

 were confused by the author, has the terminal joint of the 

 antennae almost divided into two, the head much smoother, 

 the prothorax non-foveate, and the elytra sharply bicostate 

 on the disc, with the rest of their surface very finely, closely 

 punctate. 



9. Atianca scabr//jennis,sii. n. 

 (Text-fig. 2, cJ genital armature.) 



Sc'fsixia an'b-eusi, Arrow, Mouogr. CLristmas Isl. p. 107 (1900) 



Elongate, testaceous or obscure testaCeous, the eyes and 

 the tips of the mandibles black, subopaque, the head and 



prolhorav shining, finely pubescent. Head moderatelv 



