20 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 60 



Specific characters. — Close to II. Havicollis but smaller with yellow 

 areas a rich dark cadmium yellow. 



Description of type. — Top and sides of head, including ear coverts, 

 top and sides of neck, anterior half of back, top of wings and upper 

 tail coverts dull black, of a more intense or less sooty shade than in 

 typical flavicoUis; chin, sides of head up to lower border of eyes, 

 fore neck, under tail coverts and posterior half of back, includ- 

 ing rump, rich dark cadmium yellow ; under side of body white, 

 nearly pure along middle and grayer on sides ; indistinct and partly 

 hidden black bars on whitish feathers immediately back of yellow 

 area on upper breast ; axillars and basal part of inner webs of pri- 

 maries and secondaries pure white. 



Measurements of type. — Wing, 66; tail, 48; culmen about 1 1.5 

 (broken) ; tarsus, 16.5. 



Remarks. — A nearly mature male collected by Goldman at Cana, 

 eastern Panama, May 22, 19 12, agrees with the type in the intense 

 cadmium color of the yellow areas except the under tail coverts 

 which are mainly lemon yellow but contain new cadmium colored 

 feathers showing the paler color to be a mark of immaturity. Two 

 specimens of this subspecies examined. 



VIREOLANIUS EXIMIUS MUTABILIS, subsp. nov. 



Panama Shrike Vireo 



Type. — No. 238507, adult female, U. S. National Museum, Bio- 

 logical Survey Collection, from Cana (at 3,000 feet altitude), eastern 

 Panama; collected June 11, 1912, by E. A. Goldman (collector's 

 number 15893). 



Distribution. — Known from type locality only. 



Siibspccific characters. — Similar to typical eximius but supraloral 

 part of superciliary yellow stripe broader and a tinge of yellowish 

 green suffuses and nearly replaces the blue on forehead back to 

 about middle of orbits, the posterior part of crown and nape being 

 clearest blue, whereas the forehead and front of crown are most 

 clearly blue in the type of eximius ; ear coverts bordered posteriorly 

 with blue like that of crown ; chin and throat clear bright canary 

 yellow changing rather abruptly into, and contrasting with, the yel- 

 lowish green of lower neck and breast (in eximius the chin is more 

 greenish yellow and shades thence gradually over throat to green of 

 breast) ; green of under parts paler and more yellowish becoming 

 pale olive yellow on middle of abdomen ; under tail coverts canary 



