1971] 
Powell & Burns — Palearctic Moths 
4i 
Fig. 5. Spatial distribution of Croesia forskaleana in North America. 
Earliest known year of occurrence at each locality is given. (The map 
shows the northeastern United States from Massachusetts to New Jersey.) 
collections of the author [F. M. Jones], beginning in 1913, con- 
tinued in 1917, 1921, 1925, and thereafter each year from 1927 to 
1942. For twelve consecutive years a light-trap was operated all 
night, on all nights not too stormy, and usually from late June to 
early or mid-September” (Jones and Kimball 1943: 25). It was 
F. M. Jones himself who collected this species on Martha’s Vineyard, 
not only in 1944 but also in 1949. Negative evidence that we have 
accumulated from adjacent parts of the mainland suggests that 
Martha’s Vineyard was colonized via air movement directly from 
Long Island — • an overwater distance of as little as 60 miles. 
Biology. — Various European workers have stated that larvae of 
C. forskaleana feed on maple (Acer). Ford (1949: 56, 214, 218) 
specifically gave A. campestre and A. pseudoplatanus as foodplants 
