234 



THE AMERICAN ENTOMOLOGIST. 



Summary of the Food of the Bluebird. 



No. of Specimens E.vamined. 



KINDS OF FOOD. 



I. — Insecta 



1 . Hyiuenoptera .... 



Formicidje 



Ichneumonidas,. . 



2. Lepidoptera 



Arctiinse 



Noctuidse 



Phalsenidse 



3. Diptcra 



4. Colcoptera 



Carabidae 



Dytiscida; 



Staphylinidse ... 



Histeridffi 



Byrrhidae 



Scarabaeida^ 



Aphodius 



Geotrupes 



Phyllophaga 



Etiryomia 



Elateridae 



Tenebrionidae . . . . 



Telephorus 



Curculionidae 



Cerambycidae . . . . 



Tetraopes 



5. Hetnipiera 



Coriscus 



Alydus 



Cydnidee 



0. Ovthoptcra 



Locustidae 



Gryllidae 



Acrididae 



II. — Arachnida 



ni. — XviMlflL 



IV. — Vegetable Food, 



10 



\-i 





Beneficial Elements, 

 Injurious " 



Neutral " 



Number of Specimens and Ratios in which each Element of Food was found. 



10 

 .92 



.22 



6 

 .22 



8 

 .28 



1 

 .02 







21 

 .88 



5 

 .04 



2 



2 

 .04 



20 

 ..38 



4 

 .04 



11 



ag 



1 



.01 

 10 



.19 

 16 



.10 



13 

 .88 



5 

 .03 



5 

 .02 



.40 

 .41 

 .13 



.28 

 .00 

 .12 



.39 



8 

 .18 



5 

 .13 



.03 



1 

 .02 



5 

 .11 



6 

 .21 



1 

 .01 



3 

 .02 



.00 

 1 



.38 

 3 



.06 

 1 



.01 



1 

 01 



1 

 01 



1 

 .01 



.10 



.20 

 .34 



1 

 .02 



* Tncludes 8 per cent, fruit, 



