100 Memoirs of the Indian Museum. [Vol. VII, 



bears a number of scattered punctures, especially in front. The mesosternum is matt, 

 with a coarsely punctured A-shaped area in front. It is without scars. The posterior 

 intermediate areas of the metasternum are closely and coarsely punctured, with the 

 exception of a band bordering the somewhat narrow and rugose lateral areas. The elytra 

 resemble those of M. australasicus. 



Mastochilus (s. str.) quaestionis (Kuwert). 

 Fig. XIII, 3, p. 99. 



Episphenoides quaestionis, Kuwert, 1898, p. 327. 



A number of specimens from New South Wales, several being from the Richmond 

 River. Length 44-51 mm. 



Easily distinguished from all other known species by its large inner tubercles, which 

 are situated very close to one another and to the central tubercle, the whole of the small 

 triangular concave frontal area being strongly elevated. The small central part of the 

 mentum is usually marked with a pair of more or less confluent shallow transverse grooves 

 a little behind, and a small depression in the middle of, the anterior margin ; but either or 

 both of these may be faint or absent ; or one may be so strongly developed as to obliterate 

 the other ; strong ridges, however, are never present. The lateral parts of the mentum, in 

 front of the primary scars, are glossy, punctured and hairy throughout. The pronotum 

 has no median groove ; its scars are punctured. The elytra are more coarsely punctured 

 -a,t the sides than above. 



Mastochilus (s. str.) australasicus (Percheron). 



PLI. 



Passalus australasicus, Percheron, 1841, pp. 67, pi. lxxvii, fig. 2. 



A number of specimens from Queensland, New South Wales (Richmond River) and 

 Victoria (Melbourne) ; also a series said to come from Dodinga in Halmaheira -, 1 also 

 specimens presented by Mr. H. Schrader from Tingha and New England, New South Wales. 

 Length 37-48 mm. 



The small inner tubercles are situated nearly half as far from the outer tubercles as 

 the latter are from each other, and almost directly behind them. The ridge uniting the inner 

 tubercles is often absent. When present it may lie close in front of the frontal ridges, or 

 some distance in front of them. The frontal area, which may thus be almost non-existent 

 or of considerable size, is smooth and glossy ; the area between it and the anterior margin of 

 the head is very rough. The pronotum, mentum and elytra resemble those of M. quaestionis. 



Mastochilus (s. str.) polyphyllus (MacLeay). 



Passalus polyphyllus, MacLeay, 1826, p. 439. 



Several specimens from Queensland and New South Wales (Sidney) ; also one said to 

 come from Dodinga in Halmaheira. 1 Length 34-40 mm. 



The central and inner tubercles are more widely separated than in the preceding species ; 

 and the frontal ridges, instead of running direct between the two, diverge either from an 



1 Probably part of a series from Australia which has been wrongly labelled. 



