312 Thayer and Bangs, Another Hybrid Hummingbird. [Aii^ 



band, however, is very narrow, and many Panaman examples are pre- 

 cisely like these Rio Grande specimens. 



The bird of eastern Costa Rica is S. magnoides medianus Ridgw. ; not 

 usually so extreme as more northern specimens, but clearly to be referred 

 to that form. 



Saltator striatipectus isthmicus (Sclater). Forty-six specimens, both 

 sexes, Boruca and Lagato, April-July. 



ANOTHER HYBRID HUMMINGBIRD — SELASPHORUS 



RUFUS + AT THIS CALLIOPE — -FROM 



CALIFORNIA. 



BY JOHN E. THAYER AND OUTRAM BANGS. 



Shortly after the death of Walter E. Bryant his collection of 

 beautifully mounted Californian Hummingbirds came into the 

 possession of Thayer and is now in the Thayer Museum at Lan- 

 caster, Mass. In this collection we found, while identifying the 

 species, a remarkable hybrid apparently of Selasphorus rufus and 

 Atthis calliope. It was shot at Oakland, California, May 8, 1896, 

 while feeding on locust blossoms. 



In color this example, which is a fully adult male, is somewhat 

 intermediate between adult males of the two species of which it is 

 probably a hybrid. 



The back is green, duller and more coppery than in Atthis calliope, 

 the upper tail coverts and rectrices are edged with rufous, the 

 rufous edging reaching nearly to the tips of the feathers on the 

 inner webs of the rectrices and about to the middle on the outer 

 webs; the cheeks, sides of body and under tail coverts are all 

 clouded with rufous ; the gorget, composed of feathers more pointed 

 and narrower than in Selasphorus rufus, with the white bases show- 

 ing slightly through, is of the most gorgeous ruby red, different 

 from that of either Selasphorus rufus or Atthis calliope; the shape 

 of the rectrices corresponds rather better with male examples of 

 Selasphorus rufus, the outer rectrices being narrower and pointed, 

 but the tail is short and more nearly square as in Atthis calliope. 



