64 THE CONDOR Vol. XXIII 
barely two feet away. After feeding she carried away excrement exactly as though the 
young were in the nest. The young were able to climb up and down the steepest rock 
surfaces with no difficulty whatever. When placed in the open, they became more alert 
and after a minute or so clambered away toward shelter. The heat of the sun, though 
apparently mild, affected them severely so that they panted heavily and closed their 
eyes seeming almost overpowered; it is probable that never before had they felt its 
rays. The call note for food was a faint tsee tsee. 
Two specimens secured at Williams in 1907 were identified in my previous paper 
as Catherpes m. polioptilus, after comparison with the very inadequate series of other 
Canyon Wrens at hand in my collection and in that of the Museum of the University of 
Kansas. Further study of these two birds, however, seem to indicate that they are in- 
termediate between C. m. conspersus and C. m. polioptilus (the latter apparently being 
in itself a somewhat indefinite, poorly characterized series of intermediate groups). The 
birds in question are a female taken March 4, and a male March 21, 1907, both secured 
in the canyon south of Williams. The male is slightly darker above than the female, in 
this verging slightly toward polioptilus. It is large enough alsc to be included in the 
lower range of measurements of that form. The female, paler in color, agrees with 
conspersus, and is too small to come within the range of measurements of polioptilus. 
Viewed from above both specimens have the head almost imperceptibly darker than in 
conspersus. On the other hand the back is distinctly paler than in polioptilus. After 
careful consideration it has seemed that the two are slightly nearer conspersus and they 
are placed with that form. 
37. Troglodytes aedon parkmani Audubon. Western House Wren. Fairly coi- 
mon. Nearly fledged young were found in a hole in an oak stub on July 11. 
38. Sitta carolinensis nelsoni Mearns. Rocky Mountain Nuthatch. Common on 
the slopes and around the base of Bill Williams Mountain. A brood of fully grown 
young was seen July 8. The notes of this form are slurred and are given less clearly 
and sharply than the calls of the eastern subspecies. 
39. Sitta pygmaea pygmaea Vigors. Pygmy Nuthatch. Common. A brood of 
young out of the nest was noted on July 10. 
40. Penthestes gambeli gambeli (Ridgway). Mountain Chickadee. Common on 
Bill Williams Mountain. 
41. Hylocichla guttata auduboni (Baird). Rocky Mountain Hermit Thrush. One 
was heard singing cn July 14 high up on Bill Williams Mountain. 
42. Planesticus migratorius propinquus (Ridgway). Western Robin. Robins 
were common in the town of Williams and in the surrounding region. Young just from 
the nest were seen on July 11 and 12. 
43. Sialia mexicana bairdi Ridgway. Chestnut-backed Bluebird. Common. A 
few pairs were seen in the streets of town;. and in the country this was the most com- 
mon bluebird. Young fully grown but still in juvenal plumage were noted from July 10 
to 14. On the latter date young were very common. 
44. Sialia currucoides (Bechstein). Mountain Bluebird. Fairly common. 
Biological Survey, Washington, D. C., May 26, 1920. 
FROM FIELD AND STUDY 
Late Fall Occurrence of the Lutescent Warbler at Berkeley.—A notable feature cf 
bird life in the San Francisco Bay region during the current fall and winter season has 
been the loitering of Orange-crowned or Lutescent warblers (perhaps both) For a col- 
siderable period beyond their usual dates of disappearance. 
On October 31, I found a bird dying in Faculty Glade on the University of Cali- 
fornia Campus, which was identified by Dr. Grinnell as a Lutescent Warbler (Vermivora 
celata lutescens). The specimen, now no. 39703, is preserved in the California Museum 
of Vertebrate Zoology. This postdates the previous record for this location by some 36 
days. 
On October 14, November 1, and November 15, and on intermediate dates not re- 
