i886.] Henshaw oti Birds observed in Ncxv Mexico. 7 5 



42. Passerina amcena. Lazuli Finch.— Shot ;i single individinil Aug. 

 8, the only one seen. 



43. Scolscophagus cyanocephalus. Brewer's Blackbird. —A few 

 made their appearance dnri ng the fall migration. 



44. Corvus corax carnivorus. Raven. — Rather common; undoubt- 

 edly breeds in the higher parts of the mountains. 



45. Corvus frugivorus. Common Crow. — A few were seen in Octo- 

 ber; apparently does not breed. 



46. Picicorvus columbianus. Clarke's Crow. — It is doubtfLil if this 

 species breeds as low as the elevation of our camp, 7S00 feet. It unques- 

 tionabl}', however, breeds on the high ridges and mountain sides, and 

 becomes numerous at lower altitudes among the pines, early in the fall. 



47. Gymnocitta cyanocephala. Maximilian's Jay.— This species ap- 

 pears never to get up among the pine woods. It is, however, abundant in 

 the pinon groves about fifteen miles down the river, where it is a con- 

 stant resident. 



48. Cyanocitta stelleri macrolopha. Long-crested Jay. — This Jay 

 is extremelv numerous all through the pine region, Where it is a constant 

 resident. 



49. Perisoreus canadensis capitalis. Whitk-headed Jay. — Up to 

 October 27 this bird had not descended to the altitude of our camp, about 

 8000 feet. It breeds high up in the mountains in the spruce timber, and 

 does not descend lower until heavy snows compel it to wander in search 

 of food. It is very common. 



50. Contopus borealis. Olive-sided Flycatcher. — Rather common 

 as a summer resident. Were it not for its loud, piercing note this species 

 wouI\l easily be overlooked, as it frequents the higher stubs and does all its 

 insect hunting from them. 



51. Contopus richarisoni. Western Wood Pewee. — Numerous all 

 through the pine region. 



52. Empidonax flaviventris difficilis. Yellow-bellied Flycatcher. 

 — Rather common in the brush along the water-courses. Nests on ledges 

 of rock. Saw the young accompanied by the parents July 19. 



53. Empidonax obscurus. Wright's Flycatcher. — Not common. 

 Occurs as a summer resident. 



54. Selasphorus platycercus. Broad-tailed Hummer. — Extremely 

 numerous; young birds were noticed August i, and by the loth they 

 became common. By August i the males of this species began to get 

 less numerous, and by the loth there were none; in fact, I saw very 

 few after that date. This is an extremely interesting fact. Wherever I have 

 been in the West, and for that matter in the East also, I have always been 

 led to wonder at the apparent absence of males early in fall in localities 

 where the females and young were very numerous. The observations I was 

 able to make here solved the problem to my satisfaction. The truth 

 appears to be that immediately upon the young leaving the nest the males 

 abandon their summer limits and at once set out for their winter quarters, 

 leaving the females and young to follow at their convenience. 



