99 The Cane Grubs of Australia. 
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orchard; under logs in forest; under stones at roadside; in waste land 
overgrown with weeds; in canefields in jungle country; and in rubbish 
and weeds, sandy soil near river. 
DISTRIBUTION IN FOREST oR BUSH AND CANE. 
The following table summarizes :—— 
Number of Grubs. 
Source of Collection. | Se eee 
| Forest or Native 
| 
Bush. Canefields. 
92,006 yards of plough furrows, random fields .. 0 
21,700 yards of plough furrows, random fields, | 76 | o6 
first cultivation 
Average per yard of furrow 
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DISTRIBUTION IN REGARD TO SOILS. 
Of 2.546 larve of this species of which record was kept concerning 
the kind of soil from which obtained, they were distributed as follows :— 
Red Volcanic. Clay Loam. Sandy Loam. sand. 
1,874 30 656 50 14 eG 2 
At first sight, these figures mean that this species is nearly three 
times more numerous in voleanic soils than in ordinary dark clays but 
the great preponderance may be due to the fact that more collections 
were made from the first class of soils or that this class preponderates 
in the region of the collections. If we assume that they are equally 
abundant in the two kinds of soil and that, for every time a collection 
is made from the clays, two are made from the red soils, then it is 
easily understood how such a kind of statistic is arrived at. It is 
therefore necessary that the condition in regard to the two be equalised 
by being made alike in kind before they become comparable.. This has 
been done in the next group of figures, by making the collections equal 
in quantity and, so far as possible, in quality. The figures now approxi- 
mate the true distribution as follows :— 
No. of Grubs. Averages, 
poi chlo Source of Collection. 
Red Voleanic. | Clay Loam. Per Stool. Per Yard. 
| a 2 
il .. | 38 eane stools are ah 57 1:5 Fed 
2... | 12,505 yds. plough fur- dc | 587 cfs 047 
| rows 
3 .. 146 cane stools So 1,236 ae 8-4 Suc 
4  .. | 31,074 yds. plough fur- 899 se | ie 0-25 
rows 
The data are not as yet very full but are being continually gathered. 
From such data as have been given, the species seems to be equally 
abundant in the two soils. That the species occurs in sandy loam is 
evidenced by the fact that in one instance sixty specimens were collected 
from cane growing on an alluvial flat by following the plough along 
nineteen furrows of about a length of one hundred yards each. Our 
collections from this soil are not abundant enough to be comparable. 
