MUSEUM OF COMPARATIVE ZOOLOGY. 151 



52. Contopus virens, var. Richardsoni. Tolerably frequent. 



53. Sayornis Sayus. A single individual shot near Colorado City, 

 and one other seen. 



54. Empidonax obscurus. More or less frequent in the bushes along 

 the streams. 



ALCEDINIDJE. 



55. Ceryle alcyon. Seen occasionally along most of the creeks. 



CAPRIMULGID^l. 



56. Antrostomus Nuttallii. Heard great numbers at our camp near 

 the Garden of the Gods. 



57. Chordeiles popetue. The paler form, called " Henryi" of this 

 species was everywhere common. 



CYPSELIDiE. 



58. Panyptila melanoleuca. Observed only at the Garden of the 

 Gods, where many pairs were breeding, though sought for at Castle Rocks 

 and other similar places. They breed in holes and crevices in the rocks, 

 usually far above gun-shot. They seemed very shy, and flew mostly near 

 the tops of the highest rocks. Upon ascending the rocks most frequented 

 by them they moved to other points, and thus managed to keep generally 

 out of range. By spending a considerable part of two days, we procured only 

 four specimens, though several others were killed, which fell in inaccessible 

 places. They fly with great velocity and are very tenacious of life. As 

 they swoop down to enter their nests, the rushing sound produced by their 

 winois can be heard to a considerable distance. Hirundo lhalassina was 

 also breeding here in similar situations. 



TROCHILIDJE. 



50. Selasphorus platycercus. Common and quite generally dis- 

 tributed. 



PICIDJ3. 



CO. Picus villosus, var. Harrisii. Shot a single specimen at the (Jar- 

 den of the God s. 



61. Melanerpes erythrocephalus. Common at Denver, and fre- 

 quent southward along Plum Creek and elsewhere where there were many 

 trees. 



G2. Melanerpes torquatus. First seen at Monument Park. Common 

 in the timber along Plum ('reek. 



C3. Colaptes mexicanus. Common. 



STRIGIDJE. 



64. Athene hypogeea. Common near Denver, and also seen near 

 !!hke's Mills, on Plum Creek. 



