Notes on Amycterides. 239 



ties where the Victniiiui spec-imeiis of the last two spe<-ies were 

 taken 



In addition to tlie jibove list two others — Aca/if/io/ophtis con- 

 vexiicsculus and AmorphorrJiinus australis — probably also occu*, 

 I believe I liave seen Victorian specimens, but cannot now ti-ace the 

 record. 



Viewing tlie problem broadly, it appears to me probable that the 

 Amycterid fauna of Victoria has developed as the result of emigra- 

 tion from more than one zoocentre. The genus Psalidura has prob- 

 ably spread into Victoria from the north-east. Probably the 

 granulate forms first emigrated and by their isolation in different 

 mountain ranges have now evolved the various speciesi of the mira- 

 bunda-group. The costate forms, represented by P. opprox/'mata^ 

 have only reached the north-east corner, while no representatives 

 of the tuberculate forms have yet been recorded. The tuberculate 

 and costate sections of the genus Talaurimis appear to have fol- 

 lowed similar lines; in the case of the costate forms they have not 

 yet reached into South Australia, though the tuberculate forms 

 have proceeded as far as the south-west of West Australia, where 

 they have evolved a secondary zoocentre. 



A second line of invasion appears to have been from the west, 

 and there is some evidence to show that two routes have been 

 followed. The fauna of the Mallee country is typically South Aus- 

 tralian, and such forms as Sclerorinus dixoni and Sclerorinus 

 vestituti are characteristic. The fauna of the south-west contains 

 equally typically South Australian forms, but of a different type, 

 and is exemplified by such forms as Sclerorinus frisfis, Sclerorinus 

 miicronijjemiis and Talaurinus simplicipes. I have written the 

 above with some hesitation, as though familiar with the Amycterid 

 fauna of the Mallee country and of Portland in the south-west, I 

 have seen few species from the mid-western parts of Victoria. 



The species of Cubicorrhi/uchus and to a less extent of Acantho- 

 lophus are so widespread that it is difficult now to trace their 

 emigrations. Probably they are representatives of a branch split 

 off before the evolution and different ation of the genera of the 

 Psalidura-Talauriuus-Sclerorinus complex. Too little has been 

 done in regard to the distribution of the Euomid genera to enable 

 one to form an accurate conception of their mode of spread; prob- 

 ably, however, most of the Victorian forms came from the west. 



Many points of interest in tlie distribution of these insects 

 suggest themselves as worthy of further study, but too little is 



