PREFACE. 



Plate 115 illustrates a newly discovered kind of Sea-Pike, 

 the Lanioperca mordax, of a genus peculiar to this part of 

 Australia. 



The three next plates continue the series of Polyzoa, the 

 specimens and descriptions of which have been contributed by 

 my friend Dr. MacGillivray to the National Museum and this 

 work. 



Plate 119 figures for the first time, with details of both sexes, 

 an abundant Gum-tree Grasshopper, of the family GryllidcB, 

 contrasting, by the shortness of the ovipositor, with that of 

 the family Locustidce, figured on Plate 109. 



The last plate gives figures of both sexes of a very rare 

 form allied to the preceding, but of a different sub-genus. 



The succeeding Decades will illustrate as many different genera 

 as possible, and will deal first, usually, with species of some special 

 interest, and of which good figures do not exist or are not easily 

 accessible. 



Frederick McCoy. 

 21st July, 1886. 



