"76 Memoirs of the Indian Museum. [Vol. VII, 



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The sides of the elytra covered throughout with hair-bearing 



punctures . . . . . . . . . . E. trichostigmoides, p. 75. 



The sides of the elytra hairless except at the shoulders 



The outer tubercles situated as usual on the anterior margin of 



the head and directed forwards . . . . E. alterego, p. 75. 



The outer tubercles situated slightly behind the anterior margin 



of the head and directed upwards . . . . E. planiceps, p. 75. 



Sub-family MACROLININAE. 



As denned above (pp. 12-13) this sub-family includes the Macrolininae, Pleurariinae 

 Aceraiinae, Gnaphalocneminae and Tarquiniinae of my " Account of the Oriental Passalidae." 

 When that account was written only the Indian and Burmese genera and species were 

 adequately represented in the Indian Museum collection. Before it was published I was 

 able to revise to some extent, in the light of a hurried study of the collections in London, 

 Berlin and Hamburg, my ideas regarding the forms from further east ; but the 

 arrangement of these forms there suggested is, I believe, capable of considerabe 

 improvement, as indicated in the present paper. 



The symmetrical genus Macrolinus has here been placed next to the genus 

 Pleurarius, which seems to replace it in the Indian Peninsula, i.e., before, instead of 

 after, all Oriental genera containing asymmetrical species. 



Kuwert's Helerochilus wallacei has been removed from the genus Aceraius to the genus 

 Ophrygonius, where it has been put next to 0. birmanicus and 0. singapurae, which it 

 resembles much more closely than it does any species of Aceraius. To permit of this 

 change the genera Ophrygonius and Aceraius have been redefined, greater importance 

 being attached to the character of the mandibles than to that of the elytra ; with the result 

 that Aceraius minor and aequidens of my previous paper have also to be transferred to 

 Ophrygonius. The remaining species of Aceraius can then be arranged in a single series 

 leading up from forms allied to minor and aequidens to grandis and occulidens, which 

 appear to be the most highly specialized members of the genus. 



Parapelopides, Trapezochilus, Gnaphalocnemis, Pelopides 1 and Plesthenus 2 are entirely 

 Oriental or Celebean. They resemble the Oriental forms dealt with above in that, 



1 Kuwert placed two species, schraderi and gravidus, in this genus (1898, p. 322). Zang, who had not seen either of 

 them (1905 a, p. 316) pointed out the improbability of their being congeneric (1905 6, p. 227), and suggested that the former 

 should be regarded as the type of the genus, presumably on account of its probable relationship with the remaining genus 

 of Kuwert's group Pelopinae. The material in the Van de Poll collection tends to confirm my opinion (1914 c, p. 201, 

 footnote 2) that schraderi actually belongs to the genus Protomocoelvs ; if,therefore, this species is to be regarded as the 

 type of the genus Pelopides this name, having priority over Protomocoelus, will probably have to replace it : but there is 

 little hope of settling the identity of schraderi with certainty without reference to Kuwert's type. I do not think, however, 

 that Zang's suggestion should be accepted; for Kuwert, in his first definition of Pelopides (1896, p. 229), gives only 

 Mindanao as its locality, and this is the locality of gravidus, not of schraderi. Moreover gravidus was known to him before 

 schraderi, as it alone is mentioned in his 1891 list, being placed there in the genus Pelops (= Protomocoelus). P. gravidus 

 and not schraderi should therefore, I think, be regarded as the type. It is represented in the Van de Poll collection by 

 specimens which appear to have been named by Kuwert himself, and there seems to be no longer any doubt as to its 

 identity. 



8 Boisduval's lottinii, and Kaup's quadricornis are, it is true, recorded from " New Holland." But it is quite 

 -uncertain whether lottinii is a Plesthenus at all (Kaup, 1868 a, p. 26, and 1871, p. 40 ; Blackburn, 1900, pp. 207-208) ; 



