90 
THri CONDOR 
I Vol. IV 
slightly greater. 
Type — ^ ad.; No. 2926 Coll. J. G. ; Camp Chile©, Sierra San Gabriel, Los Angeles County, 
California; July 6, 1897; collected by J. Grinnell. 
R.\nge — The Southern Sierras of California (Transition and lower Boreal Zones) from the 
Tejon Mountains (probably,) south to the Cuyamaca Mountains. 
Remarks — The differences between A', albolarvatus and AJ giavirostris are 
slight, and apparently exist only in dimensions, chiefl}^ those of the bill, as shown 
in the accompanying drawings. The relative extent of white and black areas in 
the two forms seems to be identical. The size of the bill in the two cases is re- 
markably constant, but in two instances at hand individual variation brings an 
overlapping of characters. In a specimen from Red Point, Placer County, the 
bill is as long as the average from the San Bernardino Mountains, but at the same 
time it is slenderer so that the total bulk is conspicuously less. The bird from 
the San Bernardino Mountains with the shortest bill is in this dimension equal to 
the average of albolarvatus, but the thickness is much greater than in any of the 
latter. The drawings are from selected average examples, not extremes. 
The material at hand does not justify subspecific treatment of these two forms. 
Geographical continuity of ranges possibly exists; but it seems quite as likely 
that there is a broad hiatus in the vicinity of Tehachapi Pass, whence I can find 
no record of the white-headed woodpecker. The following adult specimens from 
California have been examined; 
A', albolarvatus — Kernville 4 (probabl}^ neighboring mountains); Big Trees, 
Calaveras Co., 2; Cisco, Placer Co. 2; Snow Mt., Colusa Co. 2; Echo, El Dorado Co. 
4; PJagle Lake, Lassen Co. 5; Lights Canyon, Plumas Co. i; Red Point, Placer Co. 
3; Horse Creek, Siskiyou Mts. 3. — Total, 26. 
X. gravirostris — San Bernardino Mts., San Bernardino Co. 13; San Gabriel 
Mts., Los Angeles Co. 3. — Total 16. 
<*• > 
cL 
Figs. A and B— A', albolarvatus, 5 , No. 5108 Coll. J. G., Horse Creek, Siskiyou Mts. 
F'igs. C and D — X. gravirostris, ^ , T34)e, No. 2926 Coll. J. G., Sierra Sau Gabriel, Los 
.\ngeles Co. 
