EXPLANATION OF PLATES.* 
Page. 
Plate 1. Falco fcmoralk, Temm. — Aplornado. — Dr. Heerraaun's specimen from New Mexico 11 
2. Buieo cleyaiis, Cassin. — Red-bellied Hawk. — Adult. Dr. Heermann's specimen from California 28 
3. Bitlto degans, Cassin. — Young. No. 8524. New Mexico - 28 
4. Fig. 1. Passerculus almdinu.%, Box. — Lark Sparrow — 44G 
Fig. 2. Peucam cmsinii, Baird — Cassin's Finch Dr. Woodhouse's type specimen 485 
5. Myiarchm meticanus, Baird.— Ash-throated Flycatcher - 179 
G. Tryiigiks rvfescens, Cabanis. — Buff-breasted Sandpiper. — San Antonio, Texas. (Type of Dr. Heer- 
mann's species Actidurvs naevim) - - - 739 
7. Strepsilm melanocephala, Vigors. — Black-headed Turnstone. — California . 702 
8. Podkeps ajlifornicus, Heermann. — California Grebe. — California. From Dr. Heermann's type spe- 
cimen. (Closely related to, if not the young of Podkeps auriiui, L.) — 890 
9. PothjUmbus podke-ps, Lawr. — Carolina Grebe. — Young. California. From the type of Podylimfms line- 
aim, Heermanti 898 
10. Graculua penkillatux, Bonap. — Brandt's Cormorant — Farallone Islands. Dr. Heermann 880 
11. Falco niyrkeps, Cassin. — Black-Capped Hawk. — Shoalwatcr Bay 8 
12. Buteo swainsoni, Bonap. — Swainson's Buzzard. — Specimens from Captain Beckwith's collection. 
Utah 19 
13. Buieo sivainsoni, Bonap. — More adult plumage than the preceding. Captain Beckwith. Utah 19 
14. BuUo calurus, Cassin. — Black Ked-tail Hawk. — 8527. Coppermines of New Mexico. (Now in 
museum of Philadelphia Academy.) 2G 
15. Fig. 1. Balm fuliyinosus, Sclater. — Dusky Hawk. — New Mexico. Dr. Henry. Museum Philadelphia 
Academy. (Species described in Pr. Zool. Soc, London, 1858, 356'.)., 
Fig. 2. Buteo oxypterus, Cassin. — Sharp-winged Hawk. — Same locality and collector as the preceding. Mu- 
seum Philadelphia Academy. 
N. B. These two figures probably represent adult and young of the same species, the latter name 
having priority 30 
10. Buteo cooperi, Cassin. — Cooper's Hawk. — No. 8525. Santa Clara county, California 31 
17. Chordeiles henryi, Cassin. — Western Night Hawk.— GG98. Female. Upper Rio Grande. (The bird 
is represented of too large size by the figure) 153 
18. Fig. 1. Panyptila melanoleuca, Baird.— White-throated Swift. — No. 6017. Bill Williams's Fork 141 
Fig. 2. Cfuzetura vauxii, Dekay. — Oregon Swift. Type specimen in Museum Philadelphia Academy 145 
19. Atthis costae, Reich.— Ruffed Humming Bird.— Male and female, Nos. G073, G074. Bill Williams's 
Fork, New Mexico. - _ 138 
20. Corvus caealotl, Wagler. — Colorado Raven. — G855. Colorado Desert 5G3 
21. Corvus camivorus, Bartrah. — American Raven. 5G0 
ft Where not otherwise mentioned, the specimens figured are to be considered as in the museum of the Smithsonian Institu- 
tion, and the numbers refer to the Smithsonian record of birds. The original of each figure is indicated as far as can now 
be ascertained. 
