September, 1943 
takers’ records. The fur-takers’ records 
are believed to be highly accurate. They 
have been checked as to locality in which 
each reporting fur-taker operated. The 
determination in each case has every like- 
lihood of being correct; the fact that each 
of these fur-takers, without being required 
by law to state whether he had caught 
a red fox or a gray fox, specified which 
kind he had caught indicates that he 
knew the difference. 
It is of interest to note that those coun- 
ties that bear recent date records for gray 
foxes, fig. 13, and are therefore in gray 
Fig. 12.—Distribution of foxes in Illinois 
as indicated by fur-takers’ monthly reports for 
the seasons of 1929-30, 1930-31 and 1934-35 
through 1939-40. Data for these eight seasons 
of monthly reports have been transferred to 
the map in such a way that the county having 
the largest average catch per fur-taker has 
the greatest density of dots; other counties 
are dotted proportionally. The numbers in 
the margins represent for each county indi- 
cated the average catch per square mile as 
revealed by Brown’s survey for the 1938-39 
and 1939-40 seasons. In general, a close cor- 
relation exists between the two sets of data, 
despite the fact that one is for eight seasons 
and the other for two, 
Mour: FuRBEARER DISTRIBUTION AND INCOME 
521 
fox range, show the highest concentration 
of foxes, both species combined, tenn Ds 
The gray fox population is largely re- 
sponsible for the greater fox catches in 
these counties. 
Trappers, Catch and Income.—In- 
dex figures for per cent of fur-takers 
catching foxes (red and gray) fluctuate 
with such regularity as to suggest cycles, 
SO DAVIESS STEPHENSON | WINNEBAGO |B00NE\ MSHENRY LAKE 
19l2 | i912 1912} 1912 | 1912 
1938 | 1935 | 1937 |'38 1938\\ 
CARROLL OGLE 
DEMALB | KANE coon 
1937 ous 1912 | BEFOR 
ae) 1936} 1934 iy 
/ROQUVOIS 
HENRY | BUREAU oe 
1912 1936 GRUNDY 
pe a 
Oras 
0.03 
1912 
ay 
a a can 
CHAMPAIGN 
LOGAN 1910 1912 
1940 
sie | aah 5 ae 
ieie | a 
fot zs 
CLARA 
CUMBERL'D 
‘ae | BANE WABASH 
verrteson| N9N2 21912 
12 1912 5 
RANDOLPH | PERRY HAMILTON: 
1912 1912 TFeawniw 
. ee anita 
1 WILLIAMSON 
1912 | 1912 
UNION SONMSOA| POPE 
1912 | 1912 igialigiay 
1929 1937 
sl9l2= 1930 
¥ ot 
DY, ae 
Fig. 13.—Recent specific records of gray fox 
occurrence in Illinois. Dates show counties 
in which gray foxes were reported for the 
year indicated. Figures in the margins show 
catch per square mile as revealed by the 
Brown & Yeager report for the 1938-39 and 
1939-40 seasons. 
1912 
1936 
table 7. They rise from 14 for the 1934- 
35 season to 16 during the 1936-37 and 
1937-38 seasons, and then drop to 14 dur- 
ing the 1938-39 season, only to rise to 18 
in 1940-41, 
The distance between peaks and troughs 
may not be measured because of lack of 
data for the three seasons following 1930- 
sak 
The index figures for the average catch 
per effective fur-taker tend to run counter 
to the index figures for the per cent of 
