ECONOMIC RELATIONS OF OUR BIRDS. 
481 
Tabular Summary of Economic Relations, showing the number of specimens 
containing animal and vegetable food, and the number of insects and spiders 
taken from the stomachs, classified as to economic relations under the heads 
Beneficial, Detrimental and Unknown Relations. 
Classification 
OF Food. 
Animal food. 
Vegetal food. 
2 
4 
24 
Beneficial. 
Detrimental. 
Unknown. 
Number and Name op Speci¬ 
mens Examined. 
Of seven Ruby-crowned 
Kinglets examined. 
TS 
V 
.9 
n 
o 
o 
Ratios Represented by Lines. 
Of nine' Golden-crowned 
Kinglets examined,.... 
73 
O) 
.9 
o 
o 
Animal food. 
Vegetal food. 
6 
40 
Beneficial. 
Detrimental. 
Unknown. 
11 
Table showing the kinds and number of insects and spiders eaten by the Kinglets. 
Number and Name op 
MENS Examined. 
Speci- 
Classification 
OP Food. 
Ratios Represented by Lines. 
2 
2 
Hymenoptera .. 
B 
2 
'd 
4 
Caterpillars. 
■ 
Of seven Ruby-crowned 
3 
0) 
.9 
5 
Beetles. 
B 
Kinglets examined. 
1 
(3 
O 
1 
Spider. 
1 
6 
O 
26 
Adult forms. 
2 
4 
Caterpillars. 
- 
1 
1 
5 
Caterpillars. 
■■ 
2 
nd 
12 
Diptera. 
Of nine Golden-crowned 
3 
o 
.9 
cj 
9 
Beetles. 
■IBB 
Kinglets examined. 
8 
a 
39 
Adult forms. 
1 
O 
O 
1 
Pupa. 
■ 
1 
1 
5 
Larvae. 
Our representatives of this family are among the pigmies of the forest, and 
feed upon insects of proportionate size. From the stomach of a Ruby-crowned 
Kinglet were taken a chalcis-fly .08 of an inch, and two beetles only .07 of an inch 
long. In their method of obtaining food, they combine with the habits of the 
Fly-catchers, those of the Nuthatches and Warblers; but while they frequent 
similar haunts and feed upon the same grounds as the birds whose habits they 
imitate, their diminutive size and great agility enable them to perform a special 
’ VoL. 1 — 31 
