86 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Buteo borealis lucasanus Ripew. 
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Lower California. 
17,843! g Sierrade la Laguna Nov. 29,87 15.90 8.97 3.52 1.60 1.50 1.35 .90 .70 
17,8411 go # HE May 28, °87 15.25 8.70 3.47. 1.45 1.46 1.31 .87 .72 
17,8441 go Dew, 2,87 15.14 8.35 3.38 1.70 1.50 1.35 91 .72 
17,8401 gH May 17, 87 15.06 8.46 3.32 1.67 1.45 1.32 .91 .70 
W7,8421 gs «he May 28, °87 15.01 8.48 3.47 1.59 1.43 1.30 .90 .72 
17,8391 go 6 Apr, 27, 87 14.82 848 3.33 1.50 1.43 1.30 .86 .69 
17,8311 g Santiago Nov. 17, 87 16.08 9.32 3.52 1.76 1.50 1.26 .86  .75 
17,8321 g Santiago Nov. 24,87 15.20 9.18 3.39 1.74 145 1.31 .85 .72 
17,8241 g SanJosédelCabo Nov. 3,°87 15.63 8.63 342 173 1.45 1.34 91 .77 
17,8261 g La Paz Feb. 18, 87 15.27 8.21 3.54 1.77 1.47 1.34 .83 .72 
17,8251 g La Paz Feb. 9,87 14.83 825 3.30 1.66 1.47 130 .87 .73 
17,2122. g San Nicolas Oct. —, 59 16.24 8.81 3.78 1.79 1.65 1.35 .98 .80 
16,9252 g Cape St. Lucas Sept. 15,59 15.78 9.10 3.75 1.78 1.67 1.38 1.00 .83 
Average, 15.40+ 8.69— 3.47— 1.67+ 1.49+ 1.32+ .90— .74—- 
17,8351 9 Santiago Nov. 19, 87 16.93 10.03 3.25 1.81 1.70 140 .98 .77 
17,8371 Q Santiago Nov. 26, 87 16.79 9.94 3.62 1.75 1.62 1.37 .99 .79 
17,8331 Q Santiago Nov. 16, 87 16.35 9.52 3.87 1.90 1.65 1.48 1.02 .83 
17,8221 Q San JosédelCabo Nov. 3,87 16.41 9.03 3.57 1.85 1.64 1.52 1.05 .77 
17,8231 Q San Josédel Cabo Nov. 11,’87 16.20 9.32 3.79 1.75 1.67 1.52 .95 .78 
17,8271 Q La Paz Feb. 9,87 16.06 8.63 3.30 1.74 152 1.30 .93 .72 
17,8281 Q La Paz Feb. 24, 87 15.52 882 3.33 177 1.62 142 .91 7 
17,829! Q Triunfo June 21, 87 15.90 8.79 332 1.72 156 145 .95 .75 
Average 16.27 9.26 3.51— 1.79— 1.62+ 143+ .97+ .77— 
Buteo borealis calurus (Cass.). 
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Arizena. 
51,582 g Fort Verde Jan. 16,87 16.06 9.07 3.58 1.81 1.54 1.36 .93 .73 
51843 go Mar. 31,87 15.90 9.17 3.68 1.75 1.60 1.35 ‘94 80 
B1715 ge Mar. 12, °86 15.75 8.97 3.33 1.60 1.52 1.35 .93 .80 
B1bI73 gee Dec. 13, 86 15.52 9.25 3.55 1.62 145 1.36 .92 .75 
51,5738 go Dec. 1,°86 15.45 8.61 3.70 162 148 124 87 .73 
51,5903 g Payson Feb. 10,88 16.05 9.15 368 1.70 152 135 .85 .7 
51,5808 gt Oak Creek Jan. 6,°87 15.63 8.77 351 1.72 1.50 130 .85 .15 
51,5555 g! Ash Creek Sept. 25, 84 15.62 9.92 3.70 1.67 1.52 1.36 .89 .80 
51,5568 g Pine Springs Nov. 17, 84 15.52 876 3.43 1.58 147 1.32 .90 .76 
Average, 15.72+ 9.07+ 3.57+ 1.67+ 1.51+ 1.33+ .90— .76+ 
1 Collection William Brewster. 
2 Collection U. S. Nat. Museum. Type, 17,212. 
8 Collection Amer. Mus. Nat. Hist. 
