No.412.] SMALLER NORTH-AMERICAN SHRIKES. 
TABLE VII. — LENGTH oF TAIL. 
291 
AREA. | MATERIAL. Mope. MEAN. STANDARD Dev. 
Entire region 141 males. 101.55 + mm. | 3.49 + mm. 
95 females. 99.55 + mm. | 3.63 + mm. 
Austroriparian .| 65 males. 102 mm. IOI.9I + mm. | 3.12 + mm. 
30 females. 104 mm. 100.47 -- mm. | 3.25 + mm. 
Appalachian . 28 males. 100 mm. 99.43 -- mm. | 3.06 + mm. 
19 females. 98 mm. 97.42 -- mm. | 3.85 + mm. 
Campestrian . 20 males. 104 mm. 102.3 mm. | 3.48 4 mm. 
18 females. 102 mm. 99.89 + mm. | 3.42 + mm. 
Sonoran . 28 males. 100 mm. 102.21 + mm. | 3.90 + mm. 
28 females. 102 mm. 99.43 + mm. | 3.88 + mm. 
CV. of 141 males = 3.43 +. CV. of 95 females = 3.65 +. 
P. E. M [sub.] 141 males = + 0.198 +. 
P. E. ¢ [sub.] 141 males = + 0.14008 +. 
TaBLE VIII. — LENGTH OF BILL. 
AREA. MATERIAL, Mone. 
Entire region 164 males. 
112 females. 
Austroriparian . males. 12.1 mm. 
30 females. 12.1 mm. 
Appalachian . 38 males. 11.8 mm. 
29 females. 11.9 mm. 
Campestrian . 25 males. 12.1 mm. 
20 females. 12.1 mm. 
Sonoran 32 males. 12.1 mm. 
35 females. 12.1 mm. 
MEAN. 
STANDARD Drev. 
12.01 + mm. 
11.71 + mm. 
12.58 + mm. 
12.17 + mm. 
11.63 + mm. 
11.26 + mm. 
11.84 + mm. 
11.57 + mm. 
11.96 + mm. 
11.76 + mm. 
0.71 + mm. 
0.63 + mm. 
0.59 -- mm. 
O.51 + mm. 
0.56 + mm. 
0.54 + mm. 
0.63 + mm. 
0.51 + mm. 
0.54 + mm. 
0.53 + mm. 
CV. of 164 males = 5.89 +. CV. of 112 females = 5.35 +- 
P. E. M. [sub.] 164 males = + 0.0374 +- 
P. E. o [sub.] 164 males = + 0.0264 +. 
