46 
Psyche 
[March-June 
forskaleana may be able to cross interurban zones a little more easily 
than Clepsis unifasciana because several maples are important in 
the native flora and abundant in rural situations (as well as in cities), 
whereas all privet is introduced and the majority is planted in yards 
and kept grounds (albeit a substantial amount has escaped and 
become established in open woods, in thickets, and along roadsides). 
The picture of colonization is sketchy, owing in large measure to 
a paucity of collectors in the Northeast who are interested in local 
Microlepidoptera. Ironically, however, Powell’s Law — which states 
that “no systematic entomologist voluntarily works on insects that 
occur within 1,000 miles of his home laboratory” (Munroe 1969) 
— has helped as well as hurt : mainland spread has been documented 
chiefly by workers who left California and sampled northeastern 
tortricids in our behalf. Since this activity began only in the late 
1950’s and was casual, the long lag in appearance of peripheral 
records beyond the immediate vicinity of New York City, and even 
the apparent distributional limits themselves, may be artifacts. One 
or both species may have expanded in New England and states to 
the south earlier or farther than our records show. Both moths are 
attracted to lights, sometimes in large numbers, and both are adapted 
to urban situations. Therefore it would not seem too idealistic to 
hope that collectors residing in the megalopolis — particularly at its 
northern and southern ends in the areas of Boston and Washington 
— ■ might watch for these tortricids and sharpen our view of their 
expanding perimeters. 
Acknowledgements 
We owe much of our information to two individuals who deliber- 
ately gathered northeastern Microlepidoptera for us. C. W. O’Brien 
(Texas Tech University, Lubbock), while a student at the Uni- 
versity of California, Berkeley, made a collection in Connecticut. 
P. A. Opler (Organization for Tropical Studies, San Jose, Costa 
Rica) accumulated a large number of light-trap samples from 
Massachusetts, Rhode Island, New York, and New Jersey as a 
by-product of work with the U. S. Army in 1962. These collections, 
together with those we made, are deposited in the California Insect 
Survey, University of California, Berkeley, and in the Museum of 
Comparative Zoology, Harvard University, Cambridge. 
C. P. Kimball (Barnstable, Massachusetts) responded to queries 
on the occurrence of the two species in the area of Cape Cod and 
adjacent islands. The following persons permitted use of material 
