78 BREWSTER—A RACE OF HENSLOW’S SPARROW. 
easily distinguishable from the Ohio Valley one, and well worth 
recognizing as a distinct subspecies, which may be named and 
characterized as follows: — 
Passerherbulus henslowi susurrans, subsp. nov. 
EASTERN HENSLOW’sS SPARROW. 
Type, from Falls Church, Fairfax County, Virginia, adult male, no. 5260, 
coll. William Brewster, taken July 12, 1879, by Pierre L. Jouy. 
Measurements (in inches and their hundredths — the good old-fashioned 
standard).! Adult male, type: wing, 2.16; tail, 1.80; tarsus, .70; exposed 
culmen, .50; depth of bill at base, .32. 
Subspecific characters. — Somewhat larger than henslowi verus, with rela- 
tively stouter, deeper bill, and much more reddish back and wings, whereon 
this color — inclining to bright chestnut — is almost always conspicuously 
present and sometimes so widespread that the dull black central areas of the 
feathers are thereby narrowed and otherwise obscured. Ohio Valley birds 
possess at most comparatively little chestnut coloring, and sometimes none 
whatever. As if to compensate for such lack of adornment, their dorsal 
markings are commonly broader and blacker than those of Eastern birds. 
The last-named difference is not quite constant, however, and therefore 
should not be regarded as more than an ‘ average character,’ so-called. 
Of adult birds taken in late spring or early summer, presum- 
ably on their breeding grounds, I have fifteen specimens of susur- 
rans from Fairfax County, Virginia, near Washington, D.C., and 
ten from Middlesex County, Massachusetts. All these are much 
alike as regards the essential characters above attributed to the 
Eastern subspecies, but in other respects they exhibit more or 
less individual variation. 
Typical henslowi, of the Ohio River Valley, is correspondingly 
represented, with similar general uniformity, by two specimens 
from Quincy, Illinois; one from Grand Crossing and two from 
the Kankakee Marshes, Indiana; two from Walworth County, 
Wisconsin. The two Kankakee birds are less typical than the 
1 Wing, 55; tail, 46; tarsus, 18; exposed culmen, 13; depth of bill at base, 8 mm.— Eb. 
