Tin-: Condor 
Vol. XIII 
l.SO 
head. Side,s of neck like nape; lower neck, chest and fore breast nearly pure 
dark ash, or slate-gray: passing on lower breast into white, the feathers narrowly 
edged with black; more posteriorly the borders becoming broader and mixed with 
chestnut, and the white markings laterally assuming the form of large round spots; 
sides like back, but with some huffy edgings above, forming a narrow indistinct 
stripe, and with large conspicuous v-shaped spots of chestnut, the borders of which 
are not sharply defined; abdomen mainly pale grayish buff; crissum rich cinnamon 
l-'ig. 41. IIVUKID OU.4II.: RKSl'I.T OK THE CROSSING OK THE MOUXTAIX .AXD V.ALEEV OU.AILS 
buff, the feathers with black mesial stripes. The plumes of the crest are two, nar- 
row, broadening gradually toward the tips, moderately recurved, hi mm. in length. 
The bill and feet are essentially like those of O. p. plioui/crus, except that the 
former is le.ss robust and the curve of the tomia is more gradual. The measure- 
ments are: length, 28S; wing, 132; culmen, 12; tarsus, .il; middle toe and claw, 41. 
If this hybrid be compared point by point with the two parent forms, there 
