1917.] Chapman, Distribution of Bird-life in Colombia. 331 



Found by us only in the Temperate Zone of the Central Andes. 

 Almaguer, 1; Laguneta, 2; Santa Isabel, 4. 



(1540) Andigena nigrirostris nigrirostris (Waterk). 



Pteroglossus nigrirostris Watbbh., P. Z. S., 1839, p. Ill (No locality; Brabourne 

 and Chubb give "Colombia"; I suggest adding Subia, near La Mesa). 

 Andigena nigrirostris Wyatt, Ibis, 1871, p. 379 (Portrerras) . 



This bird appears to be restricted to the Subtropical Zone of the Eastern 

 Andes. Our four specimens were all collected by Gonzales at Subia, west 

 of Bogota. In addition to the lack of red in the bill, this form apparently 

 has the black of the nape extending somewhat further on to the back, and 

 the chestnut of the thighs slightly deeper than in spilorhynchus. Since, 

 however, the last-named race is intermediate between nigrirostris and occi- 

 dentalis, it seems not improbable that nigrirostris may intergrade with 

 s-pilorhynchus. One of our specimens shows a faint indication of red at the 

 base of the maxilla both near the nostril and at the side. 



Subia, 4. 



(1541) Andigena nigrirostris spilorhynchus Gould. 



Andigena spilorhynchus Gotild, P, Z. S., 1858, p. 149 "(Forest of Baeza on the 

 eastern side of the Cordillera, Ecuador"); Sol. &Salv. P. Z. S., 1879, p. 537 ("Reme- 

 dios,'' possibly came from above Salmon's station). 



Three specimens from the Central Andes while, in a measure interme- 

 diate, are evidently to be referred to this form rather than to the one from 

 the Western Andes, for which I have proposed the name occidentalis. While 

 all three have more red on the upper mandible than in a specimen from 

 Ecuador, two have only the faintest indication of red at the base of the lower 

 mandible, while in a third this mark is but slightly more evident. 



True spilorhynchus, so far as I can learn, has no red on the lower mandible 

 while the red on the maxilla is comparatively restricted. An Ecuador speci- 

 men in our collection is so colored, and in his description of the race Gould 

 (I. c.) states that it differs from nigrirostris in the bill being shorter and 

 broader and much more robust, and colored with obscure brownish red at 

 the base of the upper mandible. The differences in size and form do not 

 hold, but the absence of red on the lower mandible is apparently a distinctive 

 character oi spilorhynchus. Sclater (P. Z. S., 1858, p. 75) writes that "Napo, 

 specimens have an obsolete orange band at the base of the upper mandible 

 which extends rather more forward in front of the nostrils." 



