56 NE son, Wew Birds from Mexico and Guatemala. [igen 
Description.— Back greenish blue with a grayish shade, the blue much 
lighter or brighter than in true formosa. A slightly more intense shade 
of this color extends over the exposed parts of the folded wings. The 
top of head, back and sides of neck are richer, brighter blue than the 
back. The crown feathers are white at base and usually have the distal 
half blue. 
In some specimens a black area is interposed between the basal 
white and the blue of the tip, but not one of the twenty Central 
American specimens before me has the crown wholly black on 
the surface. Of twelve specimens of true formosa, six have the 
crown wholly black and six have the crown black and blue, with 
the black predominating in several. A black malar patch is 
present on most of the specimens of formosa but is exceptional in 
azurea. Among the latter it is common to find the forehead and 
basal half of the crest bluish white, which is exceptional in formosa. 
In azurea the chin, cheeks and neck down to the black pectoral 
crescent are white, washed with a light shade of blue that rests on 
the feathers like a delicate bloom varying in intensity as the bird is 
turned at different angles in the light. True formosa has the back 
dull grayish blue, the throat and adjoining part of the neck white. 
The crest of azurea appears to be larger than that of formosa. In 
size the two forms are about the same. 
Fight specimens of this bird taken by us at Huehuetan, 
Chiapas, agree with numerous specimens in the National Museum 
from various Central American localities, in being bluer than those 
from the Pacific slope of Mexico between Tehuantepec and Colima. 
In the ‘ Biologia Centrali-Americana,’ Aves, Vol. I, p. 509, the 
authors call attention to this difference but express the opinion 
that it is not a constant character. Having before me thirty-four 
specimens from various parts of Mexico and Central America, I 
find no difficulty in distinguishing the Central American bird from 
its Mexican relative. 
Cissolopha pulchra, new species. ACAPULCO JAY. 
Type, No. 144794, U. S. Nat. Museum, Dept. Agric. coll., ¢, Acapulco, 
Guerrero, Mexico, January 13, 1895. Collected by E. W. Nelson and E. A. 
Goldman (Orig. No. 2481). 
Distribution.— Rather common along the coast near Acapulco. 
Description.— Head, neck and entire lower part of body black; 
shoulders, back, rump (with upper tail-coverts) cyanine blue becoming 
