Zoology.-] NATURAL HISTORY OF VICTORIA. [Insecta. 



This species is much less abundant than the C. mcerens, and seems 

 more confined to moist places, such as river banks and deep ravines 

 and gullies. The song begins like the quacking of a duck for 

 some time before breaking into the continuous " whir," and is far 

 louder than that of the C. mcerens, becoming perfectly unbearable 

 and deafening where they abound. It seems to frequent the various 

 species of Acacia (popularly called Wattles) quite as often or more 

 often than the Eucalypti. It appears at about the same time as the 

 C. mcerens in the hottest time of the year, but is much less widely 

 distributed. It is not uncommon along the banks of the Yarra, 

 near Melbourne. The pupa resembles that of the C. mcerens, but is 

 larger, and the tooth-like spines on the anterior legs are darker, 

 larger, and stronger ; and the large basal tooth has a small 

 additional spine near its base. 



Explanation or Figures. 



Plate 50. — Fig. 4, male, natural size, with wings expanded. Fig. 4a, thorax and head of 

 same, magnified, to show circularly dilated thin margin. Fig. 5, female, with the wings dcflexed 

 in resting position on the common Wattle {Acacia deenrrens [var. mollissima']) , which it frequents. 

 Fig. 6, anterior leg of pupa, magnified, to compare with fig. 35 of C. mcerens. 



Frederick McCoy. 



By Authority : John Ferkes, Government Printer. 



[58] 



