naturalists’ quarterly advertiser. xxiii 
12. RIDGWAY, R.—Birds of Colorado .... 
13. “• Notes on the Bird Fauna of the 
Salt Lake Valley .. 
14. McILWRAITH, T.—List of Birds of Hamiliton, 
Canada West. Pamphlet, 8vo. 1868 . 
15. MEARNS, Edgar A.—Birds of Hudson Highlands. 
Part 1. 
Part 2. 
Part 3 . 
Part 4 in press .... 
10. NELSON, E. W.-Birds of Southern Illinois . 
17. “ Birds of Northeastern Illinois . 
18. COUES, Elliott.—List of the Birds of New Eng¬ 
land, with critical notes. Pamphlet, 8vo. 1868 
19. HERRICK, Harold.—Birds of Grand Menan. pp. 16. 
20. BAIRD and RIDGWAY.—New Forms of American 
Birds . 
21. ALLEN, J. A.—List of Birds near Santarem, Brazil. 
22. “ Birds of Massachusetts 
23. VERRILL, A. E.—Catalogue of Birds found at 
Norway, Maine. 
24. ALLEN.—List of Birds collected by Chas. Linden 
near Santarem, Brazil. 
Classification of Water Birds . 
The Availability of Certain Bartramian 
names in Ornithology . - 
On the Decrease of Birds in the IT. S. 
Geographical Variation in N. A. Birds . 
An Inadequate “Theory of Birds Nests.” 
Notes on the Habits and Distribution 
of the Duck Hawk ..... 
Sexual Variation in the Genus Leucos- 
ticte . . . 
Progress of Ornithology in the United 
States during the Last Century 
Ornithological Notes from the West 
Notes on the Natural History of portions 
of Montana and Dakota, with lists and de¬ 
scription of birds, useful to all Ornithologists. 
Notes on Rarer Birds of Massachusetts. 
25. 
26. 
27. 
28. 
29. 
30. 
31. 
32. 
33. 
34. 
35. 
15 
10 
15 
15 
10 
15 
35 
25 
75 
15 
10 
10 
25 
20 
25 
10 
20 
25 
25 
20 
20 
10 
25 
25 
50 
40 
