- 1,253 specimens collected from at least 2 countries
- 6 specimens identified from at least 2 countries
- 31 specimens used in 4 works
Progress
Collected From
- Canada 994
- United States 247
Identified From
- Canada 4
- United States 2
Dates Collected
- 1925 – 1930 1
- 1930 – 1935 3
- 1935 – 1940 27
- 1940 – 1945 52
- 1945 – 1950 2
- 1950 – 1955 8
- 1955 – 1960 101
- 1960 – 1965 133
- 1965 – 1970 31
- 1970 – 1975 136
- 1975 – 1980 68
- 1980 – 1985 286
- 1985 – 1990 115
- 1990 – 1995 244
- 1995 – 2000 44