PKOCEEDI^GS or UNITED STATES NATIONAL MUSEUM. 125 



44. Progne subis, (Linn.) 



Occurs during the migrations. I have seen them as early as Janu- 

 ary 20.— {P. purpurea, Deesser, Ibis, 1865, 479.) 



45. Petrochelidon lunifrons, (Say.) 



Very common from early in April until the latter part of August. It 

 is one of the most abundant of the summer visitors, and is the only Swal- 

 low that breeds here. I have not been able to detect P. swainsoni, Scl., 

 of Mexico. — (Sennett,B. Eio Grande, 15. — Hiruvdo /., Deesser, Ibis, 

 1865, 479.) 



46. Hin^ido erythrogaster var. horreorum, Barton. 



The latest Swallow to arrive in the spring and the earliest to return 

 in the autumn ; first seen about April 12, or earlier, and August 9. — 

 {H. horreorum, Deesser, Ibis, 1865, 479. — Sennett, B, Eio Grande, 15.) 



47. Tachycineta bicolor, (Vieill.) 



Common during the migrations. Some of this species must pass the 

 winter at no great distance from here, as I have frequently seen small 

 flocks in November, December, and January, after a few warm days. — 

 (Sennett, B. Rio Grande, 15.) 



48. Cotyle riparia, (Linn.) 



Not rare during the migrations. One of the latest Swallows to return 

 in the autumn. — (Deesser, Ibis, 1865, 479.) 



49. Vireosylvia olivacea, (Liun.) 



May. — ( Vireo o.. Deessee, Ibis, 1865, 480.— Sennett, B. Rio Grande, 

 16.) 



50. Vireosylvia flavoviridis, Cassin. 



Vireosylvia flavoviridis, Cassix, Fr. Phila. Acad. V, Feb. 1851, 152 ; VI, pi. ii 

 (Panama).— Scl., P. Z. S. 1856, 298 (Cordova); 1859, 375 (Oaxaca ; 

 April); Catal. 1862, 44, No. 264 (Guatemala).— Scl. & Salv., Ibis, I, 

 1859, 12(Guatemala') ; -Norn. Neotr. 1873, 11, No. 3 (Mexico to Panama).— 

 Baird, Review, May, 1866, 336 (Monterey, Mazatlan, and Rosario, near 

 Colima, Mexico ; San Jos^, Costa Rica ; Isth. Panama). — Sumichrast, 

 Mem. Boston Soc. I, 1869, 547 (Orizaba ; Alpine Reg.).— Boucard, Cat. 

 1876, 215, No. 6665 (" N. America ")• 

 Vireo flavoviridis, Baird, B. N. Am. 1858, 332. 

 Phyllomanes flavoviridis, Caban., Journ. 1861, 93 (Costa Rica). 



A single specimen, a male, taken within the fort, August 23, 1877. 



51. Vireosylvia gilva, (Vieill.) 



October 2, 1877.— (Ftreo gilvus, Deessee, Ibis, 1865, 480.) 



52. Lanivireo solitarius, (Wils.) 



August 23, 1877.— (Fireo s., Deesser, Ibis, 1865, 481.) 



53. "Vireo noveboracensis, (Gmel.) 



A common resident, breeding abundantly. — (Dresser, Ibis, 1865, 

 481.— Sennett, B. Rio Grande, 16.) 



