Fic. 
NORTH AMERICAN FAUNA. [No. 16. 
Page. 
23. A large prostrate tree of white-bark pine, a little below timberline 41 
24. Black alpine hemlocks near Squaw Creek ........2...----.--2-- +--+ 42 
25. Group of alpine hemlocks near Deer Canyon ...--.----.--------+---- 43 
26. Tronk of alpine hemlock, showing thickening and curvature of base. 44 
27. Group of alpine hemlocks............. 0.2.20. 00200-2202 eee eee eee 45 
28. Diagram showing average hourly march of temperature ........--.- 18 
20, Dwarf pines ending abruptly along cold east side of ridge .-.....--- 50 
30. Diagram of Shasta showing relations of life zones. .....---...----.- 52 
31. Winter earth plugs of pocket gopher ..........----.-..-------+----- 96 
32. Mound made by pocket gopher. (Photographed hy W. H. Osgood). 96 
33. Rock cony. (Photographed by F. Stephens) ..-......---..--------- 99 
34, Mink. (Drawn by Ernest 8. Thompson).......--.. 2. 2.262202 +--+ 105 
35. Marten. (Drawn by Ernest 8. Thompson) .....--..-..-.----0-+++-+-- 106 
36. Red-tail. (Drawn by J. 1. Ridgway)........----- seb tees Saheee 112 
37. Sparrow hawk. (Drawn by J. L, Ridgway). ..--..-.---.-2.-- +--+ 113 
38. Arctic three-toed woodpecker, (Drawn by L. A. Fuertes).......-.. 115 
39. Clark crow. (Drawn by L. A. Fuertes)....-. 2222-22-20. 0-02 eee eee 120 
40. Clark crow. (Photographed by Walter K. Fisher).....-.....---... 121 
41, Western evening grosbeak. (Drawn by L. A. Fuertes) .........--- 122 
42, White-crowned sparrow. (Drawn by L. A. Fuertes)........---.--.- 125 
43. Audubon warbler. (Drawn by L. A. Fuertes)......-....--222------ 129 
44, White hellebore. (Photographed hy Walter Kk. Fisher)..........--- 140 
45. Manzanita CHaparral..<ciscc-scccsoccecusaciee aoe sees seaewescas eae odd 157 
46. Monument on summit of Shasta. (Photographed by W. H. Osgood. 169 
