- 19,213 specimens collected from at least 6 countries
- 66 specimens identified from at least 2 countries
- 9,615 specimens used in 47 works
Progress
Collected From
- United States 19,017
- Mexico 90
- Canada 77
- Guadeloupe 8
- Panama 2
- United Kingdom 1
Identified From
- United States 59
- Canada 1
Dates Collected
- 1890 – 1895 1
- 1895 – 1900 1
- 1905 – 1910 1
- 1910 – 1915 9
- 1915 – 1920 534
- 1920 – 1925 856
- 1925 – 1930 1,537
- 1930 – 1935 1,404
- 1935 – 1940 843
- 1940 – 1945 360
- 1945 – 1950 4,527
- 1950 – 1955 8,458
- 1955 – 1960 34
- 1960 – 1965 18
- 1965 – 1970 3
- 1970 – 1975 1
- 1975 – 1980 2
- 1980 – 1985 5
- 1990 – 1995 1
- 2000 – 2005 2
Dates Identified
- 1920 – 1925 14
- 1925 – 1930 1
- 1935 – 1940 3
- 1940 – 1945 8
- 1945 – 1950 2
- 1950 – 1955 3
- 1990 – 1995 1
- 2000 – 2005 12
- 2010 – 2015 7