BIRDS OF NORTH AND MIDDLK AMERICA. 673 



According to this view of their relationships their nouienclature would 

 1)0 as follows: 



1 . Leucolepis thoracicus. 



a. fji'iit'()h'/)i,'< flionictfiis thoracicus. 

 1). Jj-iicolt'jiis thorucictis dichrons. 



2. Leucolepis phaeocephalus. 



a. Leucolepis jyhivocephalus plireocephalus. 



b. Leucolepis phxocephalus brunnescens. 



c. Leucolepis phxocephalus lawrencii. 

 'i\. Leucolepis modulator. 



4. Leucolepis salvini, 



LEUCOLEPIS LAWRENCII (Sclater). 

 LAWRENCE' S MUSICIAN WREN. 



Adult male. — Pilenni, hindneck, back, scapulars, rump, and upper 

 tail-coverts plain rich warm-sepia brown, sometimes with very indis- 

 tinct narrow bars of dusky, especially on back; wings and tail rather 

 lighter or clearer brown (the secondaries sometimes decidedly more 

 rufescent), the remiges and rectrices distin(;tly barred with black, the 

 greater wing-coverts more narrowly (sometimes very indistinctl}-) 

 barred with dusky; auricular, suborbital, and malar regions, throat, 

 chest, and anterior portion of sides of neck, uniform bright chestnut 

 or ferruginous-chestnut, the whole chin '^^and supraloral region some- 

 times also of this color;* sides of neck (except near auricular region) 

 and sides of chest and breast lighter brown than upper parts, becom- 

 ing darker and richer (nearly mumm}- brown) on flanks; median 

 portion of breast and abdomen bi-ownish gray; under tail-coverts deep 

 russet or russet-brown, sometimes with darker bars and paler tips; 

 bill black or dusk\^, the under side of mandible more or less exten- 

 sively light colored; iris brown; legs and feet dark brownish; length 

 (skins), 105-128 (135.6); wing, 62.5-67.5 (65.2); tail, 29.5-33.5 (31.3); 

 culmen, from base, 18.5-20.5 (10.6); tarsus, 22.5-25.5 (21.2); middle 

 toe, 15.5-18.5 (17.2).^' 



Adult female. — Similar to the male, and not alwa3's distinguishable, 

 but averaging .slightly lighter brown above and with median under 

 parts paler (sometimes pale buti'y gra}^ or grayish buff); length (skins), 

 110.5-222 (113.6); wing, 59-66 (62.1); tail, 26.5-33 (29.7); culmen, 



" l^sually, Imt by no means alwaygi, the chin is dusky, at least laterally, as are 

 also the anterior portion of the malar region and the anterior margin of the auricular 

 region. 



* Sometimes the chestnut not only occupies the supraloral region, but extends, 

 narrowly, over the eyes, and sometimes the forehead is more or less strongly tinged 

 ■with chestnut. 



(^ Six specimens. 



10384— VOL 3—03 43 



