550 NEW SPKCIES OF AUSTRALIAN COLEOPTERA, xiii., 



curved and inwardly concave; the eleventh is of very curious 

 sliape. and very nairowly joined to the tenth. On the type, the 

 three apical joints of each antenna are closely applied to eacli 

 other, the eleventh being apparently received into a groove in 

 the tenth, and the latter is folded back on the ninth; but a speci- 

 men from Gosford (in Coll. H. W. Cox) has the three apical joints 

 separated, when it may be seen that the ninth is very thin, the 

 tenth irregularly convex on one side, and irregularly concave on 

 the other, with the tip acutely produced for a short distance; 

 the eleventh is joined to the tenth near its base (so that the 

 mass of the tenth joint appears to be forced to one side), strongly 

 and suddenly curved at its middle, and with a small spine on 

 one side; so that probabh^ these two joints form a clasping 

 organ, as in the equally remarkable antennae of X. inalleifer: the 

 tenth joint is much larger than the eleventh, but, from some 

 directions, it appears to be actually smaller. On the female, the 

 second joint is stouter and shorter than the third; the third is 

 distinctly longer than the fourth; the seventh to tenth are 

 strongly transverse, and gradually dilated to form a club with 

 the eleventh, this being briefly ovate, and about as long as the 

 ninth and tenth combined. The head, as viewed from in front, 

 appears to have four eyes, the two median ones of which are 

 closer together than the two on each side, their outlines being 

 rendered more conspicuous by the dense pubescence covering all 

 the adjacent -smrface. 



Xylophilus pentaphyllus, n.sp. 



^. Of a tlingy, testaceous brown, parts of appendages some- 

 what paler; head blackish. Clothed with short, ashen pubes- 

 cence, denser on undersurface than on upper. 



Head with small and rather dense punctures. Eyes prominent 

 and widely separated, lightly notched in front. Antennae with 

 Hrst joint stout and moderately long, second short and trans- 

 verse, third rather long, fourth partly concealed by third, fifth 

 small and partially concealed by fourth, sixth to tenth very short 

 but each with a long ramus, eleventh almost as long as ramus of 

 tenth, rather thin at base but dilated towards apex. Prothorax 



