536 Progress of Ornithology in the United States. (September, 
In all these series, Pieris (or Daptonoura) stands at one end 
and Leptalis Melia, a banded species, but one which, as already 
remarked, does not imitate any other butterfly, at the other. 
The mimicking species always stand between the species they 
imitate and Leptalis Melia, and where there is a difference in the 
sexes, the females resemble most the imitated species, the males 
Leptalis Melia. From this Müller reasonably urges that the 
original Leptalis stock, from which the mimicking species were 
derived, was allied to Leptalis Melia rather than to a Pieris, or 
Daptonoura, and that therefore, at the very start, natural selec- . 
tion had the advantage of finding a pliable stock already resem- 
bling not a little the bird-shunned Ithomias. 
From this he proceeds to a comparison of other relations be- 
tween the mimicked species, the mimicker, and the non-mimicking 
Leptalis, and discovers that in every instance, and in each partic- 
ular, the mimicking Leptalis stands between Leptalis Melia and 
the mimicked Danaid, Acrean, or Pierid ; even in one instance the 
neuration of the mimicking species is decidedly altered, showing 
how seriously the structure may be affected by mimicry. Miiller 
studies separately the form of both fore and hind wings, the 
pattern and coloration of all, entering into many very interesting 
details, and elucidating the different points by the aid of simple 
but sufficient illustrations, which our readers will find well worth 
examining. 
PROGRESS OF ORNITHOLOGY IN THE UNITED STATES 
DURING THE LAST CENTURY. 
BY J. A. ALLEN. 
EARLY PAPERS. 
RIOR to the year 1808, when the first volume of Alexander 
Wilson’s great work was published, little had been written on 
American birds by Americans. A few lists of the birds of lim- 
ited portions of the United States that appeared during the last 
d our whole 
ornithological literature at that date. The first of these was 4 
list of about one hundred and twenty species, i i 
Thomas Jefferson in 1787, in his celebrated Notes on Viger 
This is a catalogue of the species described by Catesby, with the 
addition, in parallel columns, of the Linnzean and common names, 
and of the popular names of a few species not described by 
Catesby, — merely a nominal list of no special importance. 
