LIPT OF ILLUSTEATTOl^S. 
Page. 
]\Iap of a portion of western Montana showing location of cases of tick 
fever Opposite . 8 
Map showing localities of reported cases of tick fever in Montana, Idaho, 
Nevada, and 'Wyoming Opposite 7 
Photograph of eruption of tick fever Opposite 22 
Photograph of eruption of tick fever Opposite 23 
Photograph of eruption of tick fever from an Idaho case Opposite 24 
Chart case No. 116 25 
Chart case No. 120 30 
Chart case No. 121 35 
Plate I. — Parasite of tick fever; stained 43 
Plate II. — Parasite of tick fever; fresh blood 45 
Plate III. — Eruption of tick fever 47 
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