V72 



about the same time, Buckton published a large work, entitled 

 "A monograph of the Membracidae."* which is simply an un- 

 systematized account of the forms he had seen and is in many 

 parts a needless and costly re-hash of Fowlers' work in the 'Bio- 

 logia Centrali-Americana.' 



With very few exceptions, all the Australian Membracids ap- 

 pear to be Centrotine. The family is, as pointed out by Stal and 

 later by Hansen, certainly Tetigonioid (probably via forms relat- 

 ed to the Agalliinae, via Acthaiion) and the majority of authors 

 are assuredly wrong in placing them between Fulgoridae and 

 Cicadidae (with neither of which families have they any connec- 

 tion, except that they are all trimerous) and removing them from 

 the vicinity of the Tetigonioidea, their rightful position. There 

 is a single (introduced) Hawaiian species, probably a Ccntrotypus. 

 The males are often appreciably smaller than their females. 



I have determined 8 genera and i6 species, of which, I suppose 

 one genus and nine species to be undescribed ; there are also a 

 number of small species, probably near Ccntrotypus, that I can- 

 not satisfactorily identify generically at present and have left 

 undone until further opportunity for work or some material for 

 comparison is at hand. The Centrotinae are very difificult to 

 work out, and the difficulties have not been lessened by Buck- 

 ton's work. 



Gclastorrhachis gen. nov. 



Allied to Eiitryonia Goding**, but differs by the following- 

 characters: 



Pronotum much less widened posteriorly and is mediolongi- 

 tudinally strojigly carinatc throughout its entire length (including 

 processes), not sulcate; anterior process muc'h more hig'hly ele- 

 vated and differently shaped, posterior process about as long in 

 Eiitryonia but follows the curve of the tegmina and its tip is con- 

 tiguous with them. Venation different. Type diadcnia. 



There are two species : 



1. Lateral tforking of the anterior process of the pronotum 

 extending beyond the rest of the width of the insect 



diadcma, sp. nov. 



2. Pronotal process bulbous at its tip, lateral processes 

 small clavata, sp. nov. 



* I am much indebted to Mr. D. L. Van Dine for procuring me the loan of this work, 

 from the library of the Division of Entomology at Washington. Since the above was 

 in print, I have learnt of the death, at an advanced age, of Mr. Buckton. and conse- 

 quently have modified my original remarks on his work. 



** 1938 P. Linn. S. N. S. W., XXVIII, 6 PI. 1, fs. 10 and 11 (not 22 which refers appar- 

 ently to Eu/renchia). The venation of f. 26 does not accord with that of f. 10. 



