BIRDS OF NORTH AND MIDDLE AMERICA. 



649 



MYIARCHUS LAWRENCEII TRESMARI.^ Nelson. 

 TRES MARIAS FLYCATCHER. 



Similar to M. I. olivascens, but smaller, bill laro;er and relatively 

 broader, and color of upper parts averaging slightly grader. 



Adult male. — Length (skin), 159; wing, 78. 5; tail, 73; exposed 

 culmen, 18; tarsus, 20.5; middle toe, 10. " 



Adultfemale. — Length (skins), 150-162 (157) ; wing, 72.5-77.5 (74.7); 

 tail, 67.5-74 (71.8); exposed culmen, 16.5 18 (17. ;i); tarsus, 18. .5-20 

 (19..3); middle toe, 9-10 (9-6).^ 



Tres Marias Islands, Territory of Tepic, western Mexico. 



Myiarchus laivrencii (not Muscicapa laiurenceii Giraudi T.awren'ce. Mem. Bost. 



Soe. N. IL, ii, 1874, 288, part (Tres Marias Islands). 

 Myiarchus lawrencei olivascens (not of Ridgway) Nelson, North Am. Fauna, 



no. 14, 1899, 48 (Tres Marias; crit. ). 

 Myiarchus lawrencei tresmariir Nel.son, Proc Biol. Soc. Wash., xvii, Mar. 10, 



1904, 49 (Maria Madre Island, Tres Marias group. Territory of Tepic, western 



Mexiro; coll. V. S. Nat. Mus. i. 



MYIARCHUS LAWRENCEII OLIVASCENS Ridgway. 

 OLIVACEOUS FLYCATCHER. 



Similar to M. I. querulus, but decidedly smaller; olive of upper parts 

 paler and grayer; rectrices with cinnamomeous edgings much less 

 distinct, usually wanting on either web; edgings to remiges paler, 

 inclining to pale cinnamon only on inner primaries and yellow of 

 under parts paler (primrose). 



Adult waZe.— Length (skins), 150-172 (160); wing, 7.5-85 (81.3); 

 tail, 70-81 (76.2); exposed culmen, 16-18.5 (17.9); tarsus, 18-19.5 

 (18.6); middle toe, 9-10.5 (g.g).*^ 



Adultfemale.— hength (skins), 146-168 (153); wing, 74.5-79 (76.1); 

 tail, 67.5-76.5 (71.4); exposed culmen, 16-18.5 (17.1); tarsus, 16-19 

 (17.9); middle toe, 9-10.5 (9.5).'' 



a One specimen. 

 '» Six specimens, 

 c Fifteen specimens. 

 <* Thirteen specimens. 



Locality. 



MALES. 



Nine adult males from Arizona 



Six adult males from Sinaloa and Tepic 



FEMALES. 



Nine adult females from Arizona 



Four adult females from Sinaloa and Tepic 



Middle 

 toe. 



10.4 



9.."? 



