The Cane Grubs of Australia. 17 



recently moulted from Stage II., which would serve to show that the 

 species has a two-year life cycle. It is a native of the jungle, as Stage III. 

 larvaj in their second year of development have been found by digging 

 cane-holes in recently cleared jungle land. 



The Pupa. 



In confinement larva^ pupated on September 16th, November 3rd. 

 One that pupated on the former date emerged on October 7th, giving the 

 duration of the pupal stage as twenty-one days. 



The Adults. 

 Our only record is of an emergence on October 10th. 



ANOPLOGNATHUS POROSUS Dalman. 



Adults have been taken at Gordonvale as follows: — At light in the 

 township, November 20th ; on foliage of Eucalyptus platyphylla in com- 

 pany with hoisduvali, Novem-ber 21st ; at light-trap in canefield, December 

 11th; single specimens in each case, and the species is without doubt very 

 rare in this district. 



ANOPLOGNATHUS BOISDUVALI Boisd. 



The Egg. 



Three eggs were found by follov.ing plough in a dark volcanic cane- 

 field, January 28th ; they emerged on February 10th. Two eggs from a 

 .similar situation on February 25th emerged on March 12th. 



The Larva. 



Stage I. larva^ have been collected on December 21st, February 21st, 

 April 8th. Larvjp hatched on February 10th were still in Stage I. by 

 March 11th. The Stage III. found in November and December had 

 recently moulted from Stage IT. On December 26th Stage II. were 

 obtained that had just moulted from Stage I. 



Collecting by following ploughs during the last sixteen months has 

 resulted as follows : — September 78, October 16, November 4, December 

 7, January 2, February 14, March 17^', April 181, May 138, June 44, 

 August 53, September 1, October 15, November 13, December 3, larva^; 

 or 741 larva out of a total of 7,678, that is 9-65 per cent. 



It falls fourth in the list ; in canefield collections it is fourth, in 

 forest and fallow lands third ; in volcanic soil collections it is third also, 

 and in clay and dark loams fourth. In confinement they are very 

 susceptible to attacks of the Metirrliizium fungus. 



The Adult. 



In 1914 the first adult \vas observed on November 15th, and by 

 November 21st were throughout the forested areas; in 1915 the first 

 recorded date was November 23rd, and a few were noted through the 

 forest on December 2nd. The species has not seemed as plentiful by far 

 as in former years. At Babinda, 1915, adults Avere noticed on October 

 13th; this district is purely jungle and there is no forest for miles. 



