44 The Cane Grubs of Australia. 
THE LARVA. 
DEVELOPMENT. 
The stages have been found on the following dates at Gordonvale :— 
Stage ite | Stage ie Staze PTE: 
January 6, 16 (reared) March 1, 4, 10, 18, 21, 26 Mareh TGS als BSS Paik ke 7, 
February 4, 15 (reared) April 1,.2, 4, 7, 8, 25 
February 2: Man, 13) 15; USS 265 3H 
June Meee 2 
duly 35°65 85 dui, 2i0 
August 7, 12, 14, 31 
September 9 
October 28 
October 23, 31 (indoors) 
November 11 (indoors) 
December 6 (indoors) 
Also Stage III. has been obtained at Cooktown, March 1. 
From this data it is quite evident that the life-cycle is completed 
within the year. 
DISTRIBUTION IN REGARD TO SOILS. 
Of a total number of 351 larve from all the collections where the 
soil was recorded, 150 are from red voleanie soils, and 151 from black 
or clay loam—that is, an even distribution. But a_ proportionate 
ealeulation of the number of larve from the two soils gives a very 
different ratio. Also, 57,400 yards of plough furrows, red voleanie 
soil, yielded 138 grubs; 38,350 yards of plough furrows, loam, 19 grubs; 
or 52,923: 10,906, or -002404 and -000495 larve per yard respectively. 
DISTRIBUTION AS REGARDS HABIrat. 
The larve of this species are very abundant in the vicinity of 
Gordonvale, especially around the roots of the blady grass (Jmperata 
arundinacea) and other forest grasses, where they are much more common 
than in eanefields. Specimens were also taken at Cooktown beneath 
Imperata. The species is therefore probably a native of the forest 
lands of coastal North Queensland. It appears to be one of the few 
Cetonids that does not live in decaying wood. 
Of a total number of 322 larve from all eoilections from eane and 
forest, they are distributed as follows :— 
Cane. Forest, Grasses, &c. 
58 00 264 
Or a proportion of less than 1 to 4 from eane. 
The following table confirms this preponderance in forest :—58,630 
yards of plough furrows in cane yielded 39 grubs; 33,000 yards plough 
furrows in forest, grasses, &¢., yielded 119 grubs; or 11,700: 54,427, or 
000665 and 00360 larve per yard respectively. 
