SCIURIDAS—SCIURUS HUDSONIUS VAR. HUDSONIUS. 687 
as the peculiar phases of intergradation occurring over considerable areas 
where adjoining varieties presumably interblend. Not less important is the 
large series of the hudsonius type from Arctic America, which, under a 
slightly modified phase, is found to range throughout the great northern inte- 
rior of the continent and northwestward over the larger portion of Alaska to 
Norton Sound. 
TABLE VI.—Measurements of thirty-four specimens of SCLURUS HUDSONIUS var. HUDSONIUS.* 
‘~ a 
3 BR From tip of nose to— age end Length of— a 
2 5 Locality. . 3 PS iS & Remarks. 
Bl 2 E Balen ee E 
2 | 3 Es soit I ta fea aoe E 
= ct x | ¢ = 3 | = = 2 = 4 te) 
5 |6 ajel/a|/sé|/alel/ele]/a| es z 
1449 | .....] Nulato, Alaska..| gt | 0.77 | 1.55 | 1.98 | 7.75 | 4.70 | 6.80 | 1.17] 1.93 | 0.52 | Fresh..... 
4431 33 | Fort Simpson, | ¢ | 1.05 | 1.72 | 2.05 | 7.80 | 5.30 | 7.30 | 1.35 | 1.80 | 0.68 | ...do ...- | Collector's meas- 
H. B. T. urements. 
cel GY meet oieaner eee Ss | 1.05 | 1.90 | 2.05 | 7.80 | 4.90 | 7.00] 1.50 | 1.85 | 0.70 |....do .....]...... do. 
4191 | 389 | G’t Slave Lake, | of }...--.|..-... PROG! 74657) 4s 70 G.' 20) feecen tases lect oe. mato; tease bese do. 
H.B. T. 
“804 Lake Winnipeg | 9 | 0.85 | 1.43 | 2.00 | 7.00 | 4.75 | 5.40 | 1.15 | 1.80 | 0.55 | Alcoholic. . 
1078 |......]| Minneapolis,Min} 2 | 0.80 | 1.55 | 1.90 | 8.50 | 5.10 | 7.00 | 1.17 | 1.80 | 0.57 |....do..... 
3807 -| Grand Menan...| 9 | 0.75 | 1.40 | 1.83 | 6.75 | 3.95 | 5.75 | 1.03 | 1.65 | 0.52 |....do..... 
3806 dg | 0.77 | 1.50 | 1.90 | 6.00 | 3,90 | 5.30 | 1.12} 1.70 | 0.54] .. do... 
372) Q | 0.78 | 1.55 | 1.85 | 6.00 | 4.50 | 5.40] 1.15 | 1.80 | 0.57 |....do.... 
Cith| ee oS | 0.77 | 1.55 | 1.85 | 6.69 | 4.00 | 6.00 | 1.15 | 1.75 | 0.50 |....do..... 
(0) eee Q | 0.73 | 1.45 | 1.82 | 6.80 | 4.40 | 5.25 | 1.13 | 1.65 | 0.50 |....do..... 
3636 ||...- =. Gardincr, Me .. | 2 | 0.79 | 1.50 | 1.90 | 6.65 | 4.50 | 6 1.15 | 1.75 | 0.48 |....do ...- 
(atl eee Norway, Me ....| 2 | 0.80 | 1.45 | 1.80 | 6.50 | 3.60 | 5.45 | 1.08 | 1.20 | 0.50 |....do...- 
Ld | peoner| eEeG Cease eae Q | 0.85} 1.50 | 1.85 | 7.00 | 4.45 | 5.95 | 1.17 | 1.65 | 0.63 |....do..... 
3721 Q | 0.89 | 1.42 | 1.88 | 6.78 | 4.50 | 6.70 | 1.20 | 1.75 | 0.65 |....do ..... 
3726 Q | 0.75 | 1.45 | 1.85 | 6.45 | 5.00 | 6.70 | 1.20 | 1.88 | 0.53 !....do..... 
3723 Q | 0.82 | 1.50 | 1.92 | 6.10 } 4.75 | 6.CO | 1.14 | 1.87} 0.65 |....do..... 
3735 Q | 0.85 | 1.57 | 1.90 | 6.80 | 3.50 |-5.48 | 1.15 | 1.78 | 0.60 |....do..... 
3719 |. Q | 0.85 | 1.40 | 1.98 | 7.00 | 5.00 | 6.15 | 1.14 | 1.78 | 0.60 |....do ..-.. 
3725 -| Q | 0.77] 1.42 | 1.78 | 6.45 | 4,45 | 5.37 | 1.10] 1.70 | 0.55 |....do..... 
995 |. os | 0.78 | 1.42 | 1.20 | 6.35 | 4.57 | 6.30] 1.15 | 1.82 | 0.65 |....do..... 
3720 o | 0.75 | 1.50 | 1.90 | 6.25 | 4.35 | 6.10 | 1.15 | 1.83 | 0.60 |....do...-. 
1)02 o | 0.77 | 1.42 | 1.88 | 6.60 | 4.70 |...... 1.15 | 1.86 | 0.50 |....do..... 
14 Q | 0.83 | 1.44 | 1.90 | 6.80 | 4.50 | 6.25 | 1.12 | 1.82 | 0.62 |....do..--. 
3799 o | 0.82] 1.47] 1.90 | 6.75 | 4.70 | 6.45 | 1.14] 1.80 | 0.60 |....do..... 
3704 o | 0.83 | 1.50 | 1.00 | 6.75 | 3.50 | 5.40 | 1.20 | 1.82 | 0.63 |....do..... 
3573 |.....- Cambridge, Mass; ¢ | 0.85 | 1.60 | 2.01 | 7.25 | 4.45 | 6.50 | 1.25 | 1.87 | 0.60 |....do -.-.. 
74 ee Lynn, Mass... ..] co | 0.75 | 1.42 | 1.90 | 6.60 | 4.70 | 6.60 | 1.23 | 1.75 | 0.60 |....do..... 
05 eee Malden, Mass ..| 2 | 0.77 | 1.40 | 1.93 | 6.55 | 4.20 | 5.60 | 1.18 | 1.77 | 0.55 |....do..... 
160 |...... Springfield, Mass| ¢ | 0.£0 | 1.53 | 1.90 | 7.50 | 5.00 | 6.65 | 1.18 | 1.82 | 0.67 |....do ...-. 
2427 |...... Carlisle, Pa ..... ----4 0.20 | 1.50 | 2.00 | 7.25 | 5.00 | 6.50 | 1.20 | 1.80 ]...... edt eee From Baird’s 
Mamm. N.Am.. 
p. 270 
by DE Remarc Se-0 (eer eee .-=-| 0.80 | 1.50 | 1.85 | 7.00 | 5.00 | 6.25 | 1.10 | 1.75 }...... Es. dO-wene) |eeces< do. 
2429 |. 22... Monticello, Miss} -. | 0.80 | 1.50 | 1.85 | 6.25 | 3.50 | 4.25 | 0.80 | 1.30 |...... AW eras aren do. 
848 ae Elizabeth, N.Y | 9 |.----.|.----- ONG0) | b7s25) |) 200) || 6.85"| <2-5-|eoe cos |e coe. Fresh. -... Collector's meas- 
urements. 
* All fully adult specimens; tho females in nearly every case give evidence of having suckled young. The first 
four are from the National Museum; the cthers are from the Museum of Comparative Zoélogy, Cambridge, Mass. 
