278 Mackay, Zhe Terns of Pentkese Island, Mass. fay 
case with a normal bilaterally symmetrical color pattern. On 
the distal primary the spot is very indistinct and nearly confined 
to the inner web where it occupies a space 3 mm. long (measured 
at the shaft) and 4 mm. from the tip of the feather. Toward the 
inner margin of the web the spot narrows rapidly and disappears 
without reaching the edge of the feather. On the outer web there 
is the faintest possible suggestion of a grayish trace close to the 
shaft and opposite the spot on the inner web. On the second and 
third primaries the spots become more distinct and extend nearly 
to the margin of the inner web. On the third primary the spot is 
5 mm. long and 5 mm. from the tip of the feather. Onthe fourth 
primary in each wing the spot appears distinctly on the outer web, 
and from here on the portion of the spot on the outer web becomes 
larger and more conspicuous, that on the inner web at the same 
time diminishing until on the proximal true flight feather there is 
no mark at all on the inner web. The penultimate feather shows 
a trace of white on the inner web in the right wing, but.none in the 
left, and the last spot is slightly larger in the right wing than in 
the left, otherwise the markings are exactly alike on the opposite 
wings. 
‘While these markings have all the characteristics of a normal 
color pattern there is no known relative of the Cedar Bird with 
wings spotted in an analogous manner. 
THE TERNS OF PENIKESE ISLAND,' MASSA-— 
CHUSETTS. 
BY GEORGE H. MACKAY. 
“Tn the lap of sheltering seas 
Rests the isle of Penikese.” 
The Prayer of Agassiz, 
Joun G. WHITTIER. 
Ir THE reader will glance at the southern portion of a map of 
New England, it will be seen that there is a string of sixteen 
