516 J- A. ALLEN ON BIRDS 



rest mainly on locality, as though beyond a certain geographical range sjDecies must be differ- 

 ent whether or not the difference is evident ! Furthermore, that while they are so acute to 

 detect differences, and place so much weight upon those of a trivial character, that they 

 should be so unmindful of resemblances, and so unheedful of their suggestions. But having 

 already many times exceeded the limits proposed for this digression, we resume the list 

 of the birds of Cook County. 



5. Harporhynchus rufus Cab. Common. May 27 found a nest with one egg. Nest in a large 

 oak, supported by small twigs on the side of the trunk, about eight feet from the ground, — ■ 

 the first case I have known of this bird building so high from the ground. The birds were 

 very bold in the defense of their nest, approaching within two feet of it when my hand was 

 upon it. 



6. Galeoscoptes carolinensis Cab. Common. 



Saxicolid^;. 



7. Sialia sialis Bd. Common. 



Pakid^. 



8. Parus atricapiUus Linn. Common. 



Troglodyte) ,E. 



9. Troglodytes cedon Vieill. Common. 



10. Troglodytes hyemalis Vieill. Common. 



11. Cisiothorus stellaris Cab. Not uncommon about marshes. 



12. Cistotliorus palustris Cab. Common in the marshes. Both this and the preceding said 

 to breed numerously, especially in the Calumet marshes. 



Sylvicolid^:. 



13. Dendroeca Blackburnice Bd. Abundant. 



14. Dendroeca wrens Bd. Abundant. 



15. Dendroeca cestiva Bd. Abundant. 



16. Dendroeca coerulescens Bd. (Rev. Am. Bds. ; D. canadensis Bd., Birds of N. Am.) Very 

 common. 



17. Dendroeca pennsylvanica Bd. Abundant. 



18. Dendroeca striata Bd. Abundant. 



19. Dendroeca castanea Bd. Very common, but less numerous than either of the pre- 

 ceding. 



20. Dendroeca coronata Gray. Abundant. 



21. Perrisoglossa tigrina Bd. (Rev. Am. Bds. ; Dendroeca tigrina Bd., Birds of N. A.) Rather 

 common, but much less so than most of the preceding species of this family. 



22. Wilsonia pusitta Bon. Rather common. 



23. Wilsonia mitrata Bon. Took two or three in a couple of days' collecting. 



24. ndminthophaga peregrina Bd. Collected several. Apparently not rare. 



25. ndminthophaga ruficapilla Bd. But few seen. Apparently not much more numerous 

 than its congener preceding. 



HnUJNDINTD^E. 



26. Hirundo horreorum Barton. Abundant. 



