The Cane Grubs of Australia. 
>. 
(| 
From separate collections the following table is compiled :— 
Number of Grubs. 
Collection Number. Source of Collection. Saar ae = == Average per ard. Y 
Gane: | Grasses, Corn, 
inn Sa «&e. 
Plough Furrows—Yds. 
er ae 1,000 - 6 (forest) -006 
2 wa 910 oe 7 (forest) 00769 
3 : 600 oh | 13 (corn) | 0216 
4 Se 1,260 aie 15 (corn) | -0125 
5 oc 1,600 50 | 28 (corn) | ‘0175 
6 one 5,760 on | 3) (corn) “00538 
7 ae 1,260 5 | ete 00397 
8 So 2,240 5 | 58 | -00223 
DISTRIBUTION IN UPLAND AND LOWLAND. 
Of 186 larve from collections from upland and lowland soils, they 
are distributed as follows :— 
Upland. Lowland. 
77 se 109 
But here again the data are far from conclusive. 
Larva Livine In Dry Som For Lone Pertops. 
That the larve of this species can live in dry soil for many weeks, 
or even months, has been proved several times. A _ single instance 
suffices. On March 12, seven Stage III. larve were placed in dry sifted 
soil in a small flower-pot; the cage was not watered, but left on an 
open veranda where the afternoon sun shone fully on it; on October 23 
it was opened, six bectles in cocoons and one live larva being found. 
Had the larve not been nearly full-grown it is doubtful whether they 
would have survived. The full-grown larvae may cocoon and thus live 
for weeks. 
EEE PUPA. 
LENGTH OF PUPAL STAGE. 
We have secant data of the duration of the pupal stage. Larve have 
been found in their cocoons as early as August 15, but it is probable they 
remain some weeks thus before pupating. A pupating larva in a cocoon 
taken from a cage on November 4 pupated and emerged on December 7, 
which would serve to show that the pupal stage may last no longer than 
a month. Pupe taken from cages in the first week of November, but 
whose age was unknown, invariably emerged before December 7, and 
most before the end of November. 
MANNER OF FORMATION. 
All the pupze we have examined were in well-defined oval cocoons, 
and were not enclosed by the larval cast. 
DEPTH AT WHICH FORMED. 
In confinement, in wooden boxes with about a foot of soil, the 
