EXPLANATION OF PLATE I. 



Diagram illustrating the evolution and distribution of the Macrolininae. 



The somewhat isolated genera Macrolinus and Pleurarius have been omitted. The 

 latter is probably confined to the Indian Peninsula, 1 and the former to other parts of the 

 Oriental Region and Celebes. 



The species used in the preparation of the diagram are as follows : — 



Aceraius grandis . . 



,, helferi 

 Episphenus comptoni 

 „ indicus 



,, moorei 



neelgherriensis 

 Gonatas minimus . . 

 ,, naviculator 

 ,, schellongi . . 

 Labienus compergus 

 „ dohrni 



gigas 

 ,, trigonophorus 

 Mastochilus australiensis 

 ,, nitidulus 



„ peltostictus 



Ophrygonius inaequalis 



Pelopides dorsalis . . 

 „ symmetricus 

 ,, tridens . . 

 Plesthenus invitus . . 



,, quadricornis 



Protomocoelus australis 

 Pseudepisphenus perplexus 

 Tarquinius paradoxus 

 Tiberioides huwerti 



Aceraius dominant sp., E. Himalayas to Borneo. 



„ other spp., E. Himalayas to Borneo. 

 Episphenus dominant sp., Ceylon. 



,, dominant sp., Indian Peninsula. 



,, other spp., Ceylon. 



,, other spp., Indian Peninsula. 



Gonatas simplest sp., New Guinea, etc. 

 ,, only sp. shown, Moluccas. 

 ,, dominant sp., New Guinea, etc. 

 Labienus other spp. (left), New Guinea, etc. 

 ,, other spp. (right), New Guinea, etc. 

 ,, spp. with fused elytra, Moluccas. 

 ,, simplest sp., New Guinea, etc. 

 Mastochilus asymmetrical sp., Australia. 

 „ symmetrical spp., „ 



,, only sp. shown, Moluccas, New Guinea, 



etc. 

 Ophrygonius only sp. shown, E. Himalayas to 



Borneo. 

 Pelopides other spp., E. Himalayas to Borneo. 

 „ simplest sp., E. Himalayas to Borneo. 

 „ dominant spp., E. Himalayas to Borneo. 



Plesthenus other sp., Celebes. 



,, dominant sp., Celebes. 



Protomocoelus only sp. shown, New Guinea, etc. 

 Pseudepisphenus only sp. shown, New Guinea, etc. 

 Tarquinius only sp. shown, New Guinea, etc. 

 Tiberioides only sp. shown, E. Himalayas to 

 Borneo. 



1 See above, p. 121. 



