150 PROCEEDINGS OF THE ACADEMY OF 



reaching beyond tail. General plumage, dull dark bistre, darkest on the head 

 above and back; the posterior lower parts paler and more reddish; throat 

 and neck much tinged with pale rusty; this obsoletely bordering the feathers, 

 which here have fine whitish filaments attached to the shafts ; primaries uni- 

 form black. Tail like the rump, but with a more hoary tinge, (not paler at the 

 tip,) and crossed with seven or eight very narrow obscure bars of darker, the 

 last of which is distant an inch or more from the end. Lining of wing dark 

 bistre, much tinged with rusty, this prevalent toward the edge ; under sur- 

 face of primaries white anterior to their emargination, beyond which they are 

 ashy, approaching black at ends ; ashy portion with distant, very obsolete 

 dusky bars. No white anywhere about the head or neck. 



Wing, 10.00; tail, 5.80; tarsus, 2.70; middle toe, 1.40; inner, 90; outer, 

 1.10; posterior, -80; hind claw, 1-00 (chord); inner claw, -91; on front of 

 tarsus, 12 exposed, large transverse scutellae ; only 1-70 of the tarsus exposed. 



This very peculiar hawk- is, in all respects, utterly uulike any other Ameri- 

 can species. So much does it differ in structure, that we do not feel sure that 

 it is not from some portion of the Old World, instead of from California. 



However, we have searched in vain for descriptions which might apply to 

 it, and have also examined, but without success, the large collection of exotic, 

 as well as American, species in the museum of the Philadelphia Academy. 



We take pleasure in dedicating this apparently-new species to Mr. Gruber, 

 the collector and donor of the specimen, this gentleman, who is a zealous 

 naturalist and accomplished taxidermist of San Francisco, having added much 

 to our knowledge of the birds of California, through the frequent contribu- 

 tion of valuable specimens. 



The following reports were read and referred to the Publication 

 Committee : 



LIBRARIAN'S REPORT. 



The Librarian respectfully reports that the number of additions to the 

 Library from Jan. to Dec. 1870, inclusive, amounts to 1225. 



Of these 128 were volumes, 970 pamphlets and 127 newspapers, maps and 

 photographs. They were derived from the following sources : 



Societies, 497 ; Editors, 319 ; Wilson Fund, 122 ; Authors, 101 ; Norwegian 

 Government, 19; Geological Survey of Swtden, 11 ; Chilian Government, 11 ; 

 Publishers, 8 ; Elias Durand, 7 ; Geological Survey of India, 6 ; Thos. 

 Meehan, 5; Minister of Public Works in France, 5; Geological Survey of 

 Italy, 5; Publication Committee, 4 ; Messrs. Towusend & Adams, 4; Smith- 

 sonian Inst., 3 ; Wm. S. Vaux, 2 ; Col. Jas. Greer, 2 ; IT. S. Coast Survey, 2 ; 

 Treasury Department, 3 ; O. C. .Marsh, 1; Jos. Leidy, 1; Chas. G. Atkins, 1; 

 Jos. Jeanes, 1 ; D. F. Boyd, 1 ; Secretary of State for India, 1 ; 69 books and 

 continuations were purchased, and a valuable suite of Blume's Botanical 

 Works, comprising 14 volumes, was presented by the following gentlemen : 

 Jos. Jeanes, A. J. Brasier, G. W. Tryon, Jr., J. H. Redfield, Isaac Lea, Wm. S. 

 Vaux, Thos. Meehan, E. Durand and Chas. Schaffer, M. D. 



These additions were distributed to the different departments of the Library 

 as follows : 



Journals, 948 ; Geology, 65 ; General Natural History, 48 ; History, 36 ; 

 Conchology, 26 ; Botany, 24 ; Physical Science, 22 ; Ornithology, 18 ; Anatomy, 

 14 ; Entomology, 7 ; Bibliography, 4 ; Helrninthology, 3 ; Herpetology, 3 ; Ich- 

 thyology, 2 ; Voyages and Travels, 2 ; Mineralogy, 2 ; Chemistry, 1. 



In addition 3 volumes and 104 pamphlets were received through the Con- 

 chological Section. 



During the year some of the duplicate books and pamphlets which had from 

 time to time accumulated on our shelves were exchanged for a copy of 



[Dec. 



