Nelson — North American Mainland Myiarchvs. 49 



Myiarchus lawrencei tresmariae subsp. nov. 



TRES MARIAS FLYCATCHER. 



Ty])e. — No. 156,810, adult male, U. S. National Museum, Biolofj-ical 

 Survey Collection. From JlariaMadre Island, Tepic, Mexico. Collected 

 May 5, 1897, by E. W. Nelson and E. A. Goldman. 



Breeding range. — Tres Marias Islands, Tepic Ty., Mexico. Not mi- 

 gratory. 



Zonal distribution. — Arid Tropical. 



Subspecific characters. — Palest and grayest of the forms of lawrencei, 

 with slight bulTy borders on inner webs of inner tail feathers; bill pro- 

 portionately longer and broader than in olindficens. 



Description of slightly worn plionage. — Upperparts hair brown, only 

 slightly darker on crown; upper tail coverts drab thinly edged with pale 

 cinnamon; tail feathers thinly edged externally with same: inner pri- 

 maries and secondaries very finely edged externally with same; wing 

 coverts tipped with drab; chin, throat and breast dingy ash gray, duller 

 than in olivascens; abdomen and under tail coverts straw yellow; inner 

 Webs of inner tail feathers usually with narrow border of buff y ; bill 

 larger and broader than in olivascens. 



Measurements.— \(\n\\, male (type); Wing, 79; tail, 75; culmen, 18; 

 width of culmen, 9; tarsus, 21. 



Average of seven adult females: Wing, 76.1 (73-30); tail, 74.4 (70-79). 

 culmen, 16.8(16-18); width of culmen, 9.1 (9-9.5); tarsus, 19.6(19-20.5); 



General notes. — The present form only needs comparison with olivas- 

 cens, from which it is easily distinguished by the characters mentioned. 



# 

 Myiarchus nigriceps Sclater. 



BLACK CROWNED FLYCATCHER. 



1860. MyiarcMis nigriceps Sclater, Proc. Zool. Soc. London, I860, p. 68. 



Type locality.— F&W2ii?Lng?i, Ecuador. Type in British Museum. 



Breeding range.— Over a large part of northern South America from 

 the valley of the Amazon to Panama (including San Miguel Island). 

 Not migratory. 



Zonal distribution. — Mainly Humid Tropical but ranging above this 

 to 9500 feet in Peru (Biologia Cent. -Am., II, p. 96). 



Specific characters. — Crown slaty black: back olive greenish; wings 

 and tail of adult without rufous edgings. 



Description of fresh plumage.— Crown slaty black; back olive greenish; 

 upper tail coverts hair brown sligiitly edged with tawny olive; tail 

 feathers edged externally with hair brown varying to Isabella color; 

 outer web of outer feather drab, paler than inner web: inner webs plain 

 dusky; outer primaries without external edging; inner primaries with 



