42 Nelson North American Mainland Myiarchus. 



and often outer pair of tail feathers broadly edged with well defined 

 band of cinnamon buff. 



Description of fresh plumage. Crown bistre brown with or without a 

 slight olivaceous shade; back olive; upper tail coverts hair brown with 

 or without slight edging of russet; tail feathers edged externally on 

 basal half with drab, sometimes thinly bordered with dull rusty; pri 

 maries (except outer pair) and part of secondaries distinctly edged with 

 rusty rufous; wing coverts broadly tipped with drab or broccoli brown; 

 tertials broadly edged with grayish white; chin, throat and breast rather 

 dark ash gray; abdomen and under tail coverts straw yellow; outer web 

 of outer tail feather drab, varying in shade but usually much lighter 

 than inner web and sometimes edged with whitish; inner webs of all 

 but outer and middle pair of tail feathers with a well defined border 

 of cinnamon buffy covering from one-third to one-half the web; inner 

 web of outer tail feather sometimes plain dusky but more often slightly 

 and sometimes distinctly bordered with cinnamon buffy. 



Measurements. Averages of four adult males: Wing, 84.7 (83-87); tail, 

 84(81-85); culmen, 17.5(17-18); tarsus, 21.8(21-22.5). 



Averages of two adult females: Wing, 78.5 (78-79); tail, 79 (78-80); 

 culmen, 17; tarsus, 21.7(21.5-21.7). 



General notes. As already noted by Mr. Sclater (Cat. Bds. Brit. Mus. 

 XIV, p. 260), the present species appears to be most nearly related to 

 the Myiarchus stolidus group of the West Indies. On the mainland it 

 has no close relative nearer than northern South America. 



The proportions of wing and tail vary considerably, and in the series 

 of seventeen specimens examined (mostly not sexed) nine had the tail 

 equalling or longer than the wing and eight had the tail shorter than the 

 wing. 



Subgenus Onychopterus Reichenbach. 



1850. Onychopterus Reichenbach, Av. Syst. Nat., t. Ixv. Type Tyran- 

 nus tuber culifer D'Orbigny and Lafresnaye. 



This group is characterized by a flattened and proportionately broad 

 bill; the depth at the angle of the gonys being decidedly less than its 

 width at same place. The species in the present paper belonging to 

 this subgenus are M. lawrencei with its subspecies and M. nigriceps. 



Myiarchus lawrencei (Giraud). 

 LAWRENCE'S FLYCATCHER. 



1841. Muscicapa lawrencei Giraud, Sixteen Birds of Texas, t. 2, f. 1. 



Type locality. "Texas. " The type, No. 47,690 U. S. National Museum, 

 agrees in size and other characters with birds of northeastern Mexico, 

 whence it probably came. 



Breeding range. From near Monterey, Nuevo Leon, in northeastern 



