782 BIRDS OP CENTRAL MEXICO — JOUY. 



esq., ill 183G, and labeled siuiply ''ilfea^jco," was taken in the moun- 

 tains, 25 miles west of Oliarcas, San Luis Potosi, November 13. It 

 was found tolerably abundant in small flocks among- the live oaks at an 

 elevation of 7,000 to 8,000 feet. Found in rather open sparsely-covered 

 situations, it seemed to spend much of its time on the ground feeding 

 on fallen acorns, its habits resembling the Arizona jay, and, like that 

 sijecies, it also has a rather weak voice. 



53. Calocitta coUiei (Vig.). 



Only seen at the Barranca Ibarra, where specimens were collected 

 March 9. This noisy, showy species was found in the lower sides of 

 the barranca in small flocks of four or five. Very shy and wary and 

 constantly on the Aving, flying from place to place, they make the air 

 ring with their loud, harsh cries. 



There seems to be considerable difterence in size between the sexes 

 of this bird, the male being larger in every way. The crest of the 

 male also differs from the female's in being longer, recurved, and 

 tipped with white, while the female's is straight and tipped with blue. 



54. Corvus mexicanus Gui. 



This species, long supposed to be restricted to the west coast of 

 Mexico, notably at San Bias and Mazatlan,* was taken near the gulf 

 coast at Tampico, October 15, thus apparently extending the range of 

 the bird clear across tlie country. Several sx)ecimens were seen in 

 company with grackles {Quiscalus macrourus) feeding in a plowed 

 field. Seen frcnn a distance their glossy plumage corresponded so 

 closely with that of the grackles that, at first sight, it was difficult to 

 tell thettwo birds apart; of course closer inspection revealed their 

 different pro])ortions, but I believe that this circumstance, if it is a 

 constant habit, of tlie crows being found in company with the grackles 

 may have led to their being overlooked by collectors. 



I did not observe this bird elsewhere, but I have no doubt that fur- 

 ther investigations will show that the species has a much larger range 

 than has been credited to it heretofore. 



Family TYRANNID^E. 



55. Sayornis nigricans (Swaius.). 



Very common in state of Jalisco in summer. 



56. Pitangus derbianus (Kaiip). 



Abundant in the cottonwood trees in the outsku'ts of Guadalajara; 

 its noisy, querulous notes were constantly heard. Taken at Agua 

 Azul, Guadalajara, February 4. 



Iris dark brown. 



Biologia Centrali-Aiiiericana, Aves, Vol. I, p. 488. 



