220 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
Catalogue No. 
405c. BUBO VIRGINIANUS SATURATUS, Ridgw.—Orn. 40th Parallel, 1877, 572, foot-note. 
. (Northern coast N. Am.) [=‘‘ var. pacificus” of Hist. N. Am. B. iii. 65.] 
407a. Surnia funerea ulula (Linn.) Ridgw.—Cf. Ripew. Bull. Nutt. Orn. Club, iii. Jan. 
1878, 38. (St. Michael’s, Alaska; L. M. Turner.) 
408a. SPEOTYTO CUNICULARIA FLORIDANA, Ridgw.—S. cunicularia, var. jfloridana, 
Ripew. Am. Sportsman, iv. No. 14, July 4, 1874, 216. (Sarasota Bay, 
Florida. ) 
410. Glaucidium phalenoides (Daud.) Scl. & Salv.—G@. ferrugineum (Max.) Cougs, Am. 
Nat. vi. 1872, 370. (Tucson, Arizona; C: Bendire.) 
411. MICRATHENE WHITNEYI (Cooper) Coues.—dAthene whitneyi, COOPER, Proc. Cal. 
Acad. Sci. ii. 1863, 118. (Ft..Mojave, S. E. California. ) 
412b. Hierofalco gyrfalco sacer (Forst.) Ridgw.—F. sacer, FORSTER, Philos. Trans. Ixii. 
1772, 383, 423. (Hudson’s Bay Terr.) | 
412¢c. Hierofalco sacer obsoletus (Gm.) Ridgw.—Falco obsoletus, Gmel. S. N. i. 1788, 268. 
(Hudson’s Bay Terr.) 
414a. FALCO PEREGRINUS PEALEI, Ridgw.—F. communis, var. Pealei, Rrip@w. Bull. 
Essex Inst. Dec. 1873, 201. (Northwest coast N. Am.) 
416. Aisalon regulus (Pall.) Blyth.—falco wsalon Newton, Man. Nat. Hist. Greenl. 
1875, p. 96. (At sea, near Greenland, lat. 57° 41’ N., long. 35° 23’ W.) 
4l7a, ZASALON COLUMBARIUS SUCKLEYI, Ridgw.—J alco columbarius, var. Suckleyi, 
Ripew. Bull. Essex Inst. v. Dec. 1873, 201. (Northwest coast N. Am.) 
418. ASSALON RICHARDSONH, Ridgw.—Falco (Hypotriorchis) richardsonii, RIDGW. Proce. 
Philad. Acad. Dec. 1870, 145. (Interior of North America.) 
421. Tinnunculus sparverioides (Vig.) Gray. (Florida. )* 
422. Tinnunculus alaudarius (Gm.) Gray.—Cf. NEwTon, Man. Nat. Hist. Green]. 1875, 
96. (Off Cape Farewell, Greenland.) 
24. POLYBORUS LUTOSUS, hidgw.—Bull. U. S. Geol. & Geog. Surv. Terr. No. 6, 
2d ser. Feb. 8, 1876, 459. (Guadalupe I., Lower California. ) 
433a, ASTUR ATRICAPILLUS STRIATULUS, Ridgw.—4dA. palumbarius, var. striatulus, 
Ridgw. in Hist. N. Am. B. iii. 1874, 240. (Western N. Am.) 
435. Buteo vulgaris, Leach.—Cf. MAYNARD, Bull. Nutt. Orn. Club, i. No. 1, April, 1876, 
2-6. (Pawpaw, Mich.) @ 
4364. BUTEO BOREALIS KRIDERI.—“ B. borealis, variety kriderii,” Hoopes, Proc. Philad. 
Acad. 1873, 238, pl. v. (=juyv.; Winnebago Co., Iowa.) 
436c, BUTEO BOREALIS LUCASANUS, Ridgw.—B. borealis, var. lucasanus, Hist. N. Am. B. 
iil. 1874, 258, 285. (Cape St. Lucas.) 
436d. BUTEO BOREALIS SOCORROENSIS. 
In the *‘Proceedings”’ of the Boston Society of Natural History, 1871, p. 42, Mr. Lawrence 
refers toa ‘‘ Buteo borealis, var. montanus, Nutt.” as being very abundant on the island of 
Socorro, where it is the only species of hawk to be found, and where it isa ‘‘ constant resi- 
dent, rearing its young, and subsisting entirely on land crabs”, ete. In the same paper, p. 
10. Mr. Lawrence applies the same name to a hawk occurring abundantly on the Tres Marias 
Islands, and there subsisting ‘‘entirely upon the Iguana lizard and rabbits.” In ‘History 
of North American Birds”, vol. iii, p. 285 (1874), Ireferred the Tres Marias bird to Buteo 
borealis va¥ costaricensis, and described our only specimen from that locality as the young 
of that form, although I had not, from want of specimens, been able to compare it with the 
corresponding age of the Central American bird. I now have strong doubts as to its being 
the same as B. costaricensis, while as to the hawk found on Socorro I regard it quite certain 
that it is, like the Caracara of Guadalupe (Polyborus lutosus), a species or race peculiar to 
that remote island, the birds of which are for the most part entirely local. I therefore pro- 
pose to name, provisionally, the Socorro Hawk B. borealis socorroensis. 
440. Buteo abbreviatus, Cabanis, in Schomb. Guiana, iii. 1848, 739.—‘“‘ B. zonocercus, Sel.”, 
CooPER, Orn. Cal. i. 1870, 479. (Coast of California, near San Diego.) 
*There is a male of this species in my collection said to have been obtained in Florida. It was found 
with a collection of Florida birds, forming part of a dealer's stock, and was evidently the same ‘‘make” 
of skin as the rest of the lot. 
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