98 BULLETIN 17 9, UNITED STATES NATIONAL MUSEUM 



East to Guiana (Cayenne) ; eastern Brazil (Goyaz) ; Paraguay 

 (Sapucay ) ; and Uruguay (Rio Negro and Minas) . South to southern 

 Uruguay (Minas, Montevideo, San Jose, and Colonia) ; and central 

 Argentina (Isla San Martin, Buenos Aires, and Venado Tuerto). 

 West to east-central Argentina (Venado Tuerto and Santa Elena) ; 

 Bolivia (Montes) ; Ecuador (Rio Suno and Rio Coca) ; western Co- 

 lombia (Rio Frio and Bogota) ; Costa Rica (Puntarenas and Puerto 

 Humo) ; El Salvador (San Salvador and Santa Ana) ; Oaxaca 

 (Tapariatepec and Chivela) ; Nayarit (Tepic and San Bias) ; Sinaloa 

 (Escuinapa and Mazatlan) ; and Sonora (Agiabampo and Alamos). 



The range as outlined is for the entire species, which has been 

 separated into several races. All but one of these are confined to 

 South and Central America. The form occurring in the United 

 States {Pitangus sulphuratus derbianus) ranges southward from the 

 lower Rio Grande Valley in Texas to western Panama. 



Casual records. — A specimen was collected at Inglewood, Calif., on 

 September 4, 1926, and one was taken at Chenier au Tigre, La., on 

 May 23, 1930. 



Egg datcf?. — British Honduras: 4 records. May 7 to 24. 



Mexico : 23 records, March 28 to July 13 ; 12 records, May 1 to 17, 

 indicating the height of the season. 



Texas : 12 records, March 27 to June 23 ; 6 records. May 12 to 28. 



MYIODYNASTES LUTEIVENTRIS SWARTHI van Rossem 

 ARIZONA SULPHUR-BELLIED FLYCATCHER 



Plate 9 



HABITS 



The above name was bestowed on the northwestern race of the 

 sulphur-bellied iSycatcher, which breeds in the high mountains of 

 southern Arizona and probably adjacent parts of Mexico, by A. J. 

 van Rossem (1927). He describes it as similar to the typical race 

 of southern Mexico and Central America, "but under parts paler 

 yellow; streaking of under parts less conspicuous and averaging 

 narrower, particularly on flanks; upper parts paler with edgings 

 of feathers grayer (less yellowish) buff; edgings on wing coverts 

 whiter and unusually broader; cinnamon rufous of lower rump, upper 

 tail coverts, and tail paler." 



We had been in the Huachuca Mountains, Ariz., for nearly a 

 month before we saw and collected my first pair of sulphur-bellied 

 flycatchers. I had been told to expect them about the middle of 

 May, their usual time of arrival, but it was not until May 29 that 

 we found them in Miller Canyon. We heard their peculiar notes 

 when we reached the heavy sycamore timber in the upper part of 



