1918.] F. H. Gravely : Passalidae of the World. 101 



anterior prolongation of the central tubercle or at very acute angle, and curve first outwards 

 and then a little forwards, with the result that the frontal area appears markedly 

 transverse. The ridge joining the inner tubercles together is present, but there are no 

 ridges in front of these tubercles. The mentum is glossy throughout, and bears a small but 

 deeply impressed V- or U-shaped groove in the middle in front ; only the lateral parts are 

 punctured. The pronotum resembles that of P. functiger, the median groove being very 

 strongly developed. The dorsal grooves of the elytra are imperfectly, the lateral ones 

 strongly but not very coarsely, punctured. 



Mastochilus (Analaches) australiensis (Stoliczka). 

 Fig. XIII, 4, p. 99. 

 Cetejus australiensis, Stoliczka, 1873, pp. 157-158 (continuation of footnote to p. 156). 



A number of specimens from Queensland, one from New South Wales and one from 

 New Guinea (Stephansort, Astrolabe Bay). Length 25-5-30-0 mm. The smallest and 

 flattest species known from Australia, also the only one with asymmetrical outer tubercles 



All six antennal lamellae are extremely long and slender. The upper tooth of both 

 mandibles is obsolete, and the denticle behind it, though well developed, is more or less 

 hidden beneath the ends of the supra-orbital ridges ; from this denticle a slight ridge 

 extends downwards to the outer angle of the mandible, which is produced into an acute 

 and outwardly (almost forwardly) directed tooth. The outer tubercles are very large, 

 the left one slightly more so than the right ; the gap between them is semi-circular. 

 The inner tubercles are situated at their base ; the frontal area is about twice as broad 

 as long. The general surface of the upper side of the head is more or less strongly 

 punctured. The secondary scars on the mentum are transverse and matt ; with the 

 middle of the anterior margin they enclose more or less completely a small triangular 

 glossy area. 



The pronotum is more or less sparsely covered at the sides with large punctures, which 

 tend to concentrate in and around the scars. Its marginal grooves are punctured throughout 

 and are scarcely bent inwards at their anterior ends. The median groove is more or 

 less obsolete. The dorsal grooves of the elytra are finely punctured ; the lateral ones are 

 much broader than the ridges between them, and the transverse ridges between their 

 enlarged matt punctures are more or less obsolete. 



Mastochilus (Analaches) puberilis (Kuwert). 



Epilaches pubarilis, Kuwert, 1898, p. 337. x 



One specimen from Milne Bay, British New Guinea, and one presented by thß British 

 Museum, also from New Guinea. Length 31-33 mm. 



The mandibles are not angulate externally, and the denticle near the base of the upper 

 margin is not covered by the anterior angles of the head. The outer tubercles resemble 

 those of M. australiensis, but the inner ones are situated a considerable distance behind 

 them. The frontal area is smaller and more triangular. The pronotum is somewhat 

 indistinctly punctured in the scars and marginal grooves ; except for this it is unpunctured ; 

 the median groove may be somewhat stronger. The dorsal grooves of the elytra are 



1 First mentioned in Kuwert's 1891 list, where the name is spelt puberilis as above. 



