126 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



54. Vireo belli, Aud. 



A single specimen taken.— (Dresser, Ibis, 1865, 481.— Sennett, B. 

 Eio Grande, 16.) 



55. Ampelis cedrorum, (Vieill.) 



Seen in small flocks during the migrations ; doubtless pass the winter 

 here. — (Dresser, Ibis, 1865, 480.— Sennett, B. Eio Grande, 16.) 



56. Collurio ludovicianus var. excubitoroides, (Swains.) 



Abundant from about the first of September until April. I do not 

 think that any remain to breed. — (C. ludovicianus excubitorides, Sen- 

 nett, B. Rio Grande, 16. — Collyrio ludovicianus, Dresser, Ibis, 1865, 

 480.) 



57. *Pyranga aestiva, (GmeL) 



Not rare during the migrations ; a few remain here all summer. — 

 (Dresser, Ibis, 1865,479. — Sennett, B Rio Grande, 14.) 



58. Chrysomitris tristis, (Linn.) 



Not rare during the winter months. — (Dresser, Ibis, 1865, 479.) 



59. Passerculus savanna var. alaudinus, Bon. 



February. — (P. alaudinus. Dresser, Ibis, 1865, 487.) 



60. Pooecetes gramineus var. confinis, Baiid. 



Spring and autumn. — (P. gramineus, Dresser, Ibis, 1865, 487 — P. 

 gramineus confinis, Sennett, B. Rio Grande, 17.) 



61. Coturniculus passerinus, (Wils.) 

 January. — (Dresser, Ibis, 1865, 487.) 



62. Chondestes grammica, (Say.) 



This species is most abundant during the migrations in April and 

 September; but a few pass the winter, and some remain to breed. In 

 this vicinity, they appear to build indifferently on the ground or in 

 bushes. When in the latter situation, the nest externally is rather 

 bulky, but is neatly fiuished inside with hairs and rootlets. — (Dresser, 

 Ibis, 1865, 488 —Sennett, B. Rio Grande, 19.) 



63. Zonotrichia leucophrys, (Forst.) 



Abundant during the colder months. — (Sennett, B. Rio Grande, 19.) 



64. Zonotrichia intermedia, Ridg. 



This variety seems to be about as common during winter as the pre- 

 ceding.— [Z. gambeli, Dresser, Ibis, 1865, 488.) 



65. Zonotrichia albicollis, (Bon.) 



Ou May 11, 1877, 1 heard the unmistakable song of this species within 

 the fort. 



