BIRDS OF NORTH AND MIDDLE AMERICA. 503 



j. Darker, with under parts more densely spotted and black 

 streaks on back broader; adult male averaging, wing 84, tail 

 78, exposed culmen 23.2, tarsus 28.5. (Pacific coast, from San 

 Diego County, California, to San Quentin, Lower California. ) 

 Heleodytes brnnneioapillua bryauti (p. 519) 

 jj. Paler, with under parts less densely spotted and black streaks 

 on back narrower; adult male averaging, wing 85.3, tail 77.5, 

 exposed culmen 23.5, tarsus 29. (Cape district of Lower 



California.) Heleodytes brunneioapillus affinis (p. 520) 



hh. Tail less banded, the inner web of lateral rectrices marked with 

 white only toward ends, or very rarely barred for greater part 

 of its length; brown of pileum duller (usually more nearly sepia 

 than chestnut) ; back more irregularly and less conspicuously 

 streaked. 

 i. Smaller (adult male averaging, wing 85.1, tail 76.4, exposed cul- 

 men 19.5, tarsus 27.2; adult female, wing 80.3, tail 74.1, exposed 

 culmen 22. 2, tarsus 26. 1 ) . ( Central portion of Mexican plateau. ) 

 Heleodytes brnuneicapillas obscnrus (p. 521) 

 ii. Larger (adult male averaging, wing 86.7, tail 80.7, exposed cul- 

 men 23.3, tarsus 28.3; adult female, wing 83.3, tail 78.7, 

 exposed culmen 22.1, tarsus 27.6). (Northern portion of 

 Mexican plateau and contiguous portion of United States, from 

 Texas to southern California, southern Nevada, and southern 



Utah. ) Heleodytes brenneicapillns conesi (p. 522) 



ff. Throat immaculate white; back variegated with small guttate, tri- 

 angular, or diamond-shaped spots of whitish and larger, more or 

 less transverse, spots of black. 

 g. Pileum dusky, the feathers narrowly margined with grayish brown; 

 postocular stripe dusky; posterior under parts whitish, the under 

 tail-coverts broadly barred with black; inner web of lateral rectrix 

 mostly plain dusky. (Southeastern Mexico.) 



Heleodytes jocosus, adults (p. 524) 

 gg. Pileum brown (mummy brown to dull seal brown), the feathers 

 dusky centrally; postocular stripe brown; posterior under parts 

 cirmamon-buff, the under tail-coverts without black bars (rarely 

 with a few small black spots). (West-central Mexico, north to 

 southern Chihuahua.) Heleodytes gularis (p. 526) 



HELEODYTES ALBOBRUNNEUS Lawrence. 

 ■WHITE-HEADED CACTUS WltEN, 



Adult mxile. — Head, neck, and under parts, including axillars and 

 under wing-coverts, immaculate white, the axillars and under wing- 

 coverts sometimes clouded or indistinctly streaked with light grayish 

 brown; outer side of thighs partly grayish brown; under tail-coverts 

 brownish white or pale brownish buff, more or less spotted, streaked, 

 or clouded with grayish brown; upper parts (except' pileum and hind- 

 neck) uniform sooty brown (deep sepia); bill horn color, with paler 

 tomia; legs and feet horn color (in dried skins); length (skins), 175-190 

 (183,8); wing, 79-88 (83,7); tail, 72-84 (77.4); exposed culmen, 19-23 

 (20.6); tarsus, 25-26.5 (25.5); middle toe, 15.5-17.5 (16.7).« 



Adult female. — Similar to the adult male, but pileum and hindneck 



« Six specimens. 



