Red-backed Junco 381 
This form combines the dark, sooty back of J. hyemalis with the lower- 
parts of J. shufeldti, the flanks being slightly tinged with pink, and 
sometimes ashy as well. It is far from uncommon near Colorado 
Springs during spring, and is represented in the Aiken collection by 
a good series obtained in March and April. 
Junco montanus = J. shufeldti x J. mearnst. 
Junco montanus, Ridgway, Auk, XV., p. 321 (1898). 
In this form the head and chest are dark slate instead of black as 
in typical J. shufeldtz, or pale grey-slate as in J. mearnsi, while the pink 
on the flanks is usually more developed than in J. shufeldti and less than 
in J. mearnsi. As the breeding range of this form is more or less inter- 
mediate between that of the more northern J. shufeldti and the more 
southern J. mearnsi, it is perhaps most logical to consider it as an 
intergrade rather than as a hybrid. There is a considerable series 
of this form in the Aiken collection, collected chiefly in the months 
of March and April when it is a common constituent of Junco flocks. 
Junco annectens = J. caniceps x J. mearnst. 
Junco annectens Baird, in Cooper’s Orn. Cal., p. 564 (1870). 
This form combines the chestnut back-patch of J. caniceps with the 
pink flanks of J. mearnsi. An example was obtained by McGregor 
(‘‘Auk, X.,”? 1893, p. 205) near Boulder, on November 25th, 1892, ina 
mixed flock, and was identified as J. ridgwayi, which was subsequently 
shown to be asynonym of J. annectens. The only example in the Aiken 
collection is a male from Salt Lake City, taken by Aiken, April 16th, 
1894. Aiken informs me that this is the prevailing form of Junco 
in the Utah plains during the migration season, and that it breeds in 
the Uintah Mountains. 
Genus AMPHISPIZA. 
Medium-sized or small terrestrial, Sparrow-like birds with small, 
conical bills and moderately long and pointed wings ; the ninth (outer) 
primary shorter than the fourth, longer than the third; the eighth 
and seventh the longest ; primaries exceeding the secondaries by less 
than the length of the tarsus ; tail slightly shorter than (about -90 of) 
the wing, and slightly rounded or double rounded. Plumage plain 
greyish-brown with or without streaks on the back; tail blackish 
with a white or pale-coloured edging on the outer web of the outer 
feathers, and sometimes a white spot as well. 
