130 EXPLORATIONS AND SURVEYS WEST OF 100TH MERIDIAN. 



these birds enter crevices in the rocks with food for their young. In 

 approaching the nests, they flew with scarcely abated speed, till just at 

 the entrance, when their wings were closed, and they glided in with 

 scarcely a perceptible stop, it almost appearing as though they literally 

 flew in. 



TROCHILID^E (the Hummingbirds). 



120. Stellula calliope, Gld. The Oalliope-Hummingbird. 



Though not nearly so abundant as either Eufous-backed or Broad- 

 tailed Hummers, this diminutive species was still by no means rare. 

 At Inscription Bock, N. Mex., where it was first seen, perhaps half a 

 dozen were found in a two-days' stay. At Apache, during the latter 

 part of August and 1st of September, it was rather common ; but in the 

 higher portions of the White Mountains, it was most abundant, and 

 here, I doubt not, it finds its summer-home. At Camp Grant, the 27th 

 of August, it was still present, though in small numbers. 



121. Trochilus alexandrij Bourc. & Muls. Black-chinned Hummingbird. 

 Two specimens of this hummer were taken at Apache in August, 

 and a third at Camp Grant in September. It is thus apparently rare 

 in this portion of Arizona, in which Territory it has not hitherto been 

 detected. 



122. Calypte annce, (Lesson.) Anna Hummingbird. 



As this species has been found within our borders only in the coast- 

 region of California, its detection at Camp Grant, Ariz., has widely 

 extended its distribution. It is likely that it inhabits the intermediate 

 region in greater or less numbers. At the point where it was found it 

 is by no means rare, as I saw in the neighborhood of twenty during the 

 four days spent in collecting in this vicinity. They were always seen 



