Nelson New Birds from Southern Mexico. 155 



Measurements of Aphelocoma guerrerensis and A. unicolor. 



Remarks. The distribution of color in Aphelocoma guerrerensis and A. 

 unicolcr is the same, but the differences in size, proportions, and intensity 

 of color between our series of the two forms are very constant. This 

 being the case and in view of the isolation of the habitat of A. guerreren- 

 $is, it appears best to treat this form as a distinct species although evi 

 dently derived from A. unicolor. 



A. guerrerensis is based upon a series of 11 specimens. 



Vireolanius melitophrys goldmani, subsp. nov. 

 Goldman's Shrike Vireo. 



.^Q. 186,309, 9 ad., U. 8. Nat. Mus., Biological Survey Coll. 

 From Huitzilac, Morelos, Mexico. Collected June 10, 1903, by E. W. 

 Nelson and E. A. Goldman. 



Distribution. Oak forest on south slope of the mountains bordering 

 south side of Valley of Mexico, in States of Mexico and Morelos (7,000 to 

 9,000 feet). 



tfubspecific characters. Larger and generally paler than typical V. 

 melitophrys with heavier black stripe on sides of throat?: chestnut-rufous 

 band across breast only, this color replaced along sides by wash of dull 

 buffy. 



Description of type. Forehead dingy gray shading back into darker 

 more slate gray on nape, back and sides of neck; gray of neck shading 

 into color of back on shoulders without any definite limit between two 

 areas; back, top of wings and rump light olive green; tail, slate gray 

 washed above with color of rump; superciliary stripe lemon yellow be 

 coming white posteriorly; broad stripe extending through eye and back 

 over ear coverts, dark slate gray; broad white malar stripe extends back 

 across cheeks to unite with area of same color covering chin, throat and 

 underside of neck; this area overlaid with a faint wash of buffy. Well 

 defined black stripe (heavier than in true melitophrys}, extends from 

 angle of lower mandible back along sides of chin and throat, thus out 

 lining white malar stripe; band across forepart of breast light ferrugin 

 ous chestnut; sides of body dull grayish; middle of breast, abdomen and 



