IO SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 60 



median line and darker and more olive on sides ; sexes alike except ab- 

 sence of concealed orange rufous spot on back of female ; size about 

 as in saturatus. 



Remarks. — A series of sixteen T. a. saturatus from various Costa 

 Rican localities, including the type, agree in having the crown and 

 back of practically the same color and in having the under parts of 

 neck and body nearly uniform. Five specimens from Calobre (Ver- 

 agua), the Canal Zone, and Cana near the Colombian border, agree 

 in having the crown distinctly more rufous than back and the under 

 side of neck and fore breast ochraceous buffy contrasting with re- 

 mainder of lower parts. The specimen from Calobre, Veragua, 

 western Panama, in the U. S. National Museum is evidently the 

 basis for the statement by Mr. Ridgway that in T. a. saturatus the 

 pileum is sometimes deep russet. As stated above this specimen 

 belongs to the present subspecies and is even darker and more 

 strongly marked than any of the other examples, including the type. 



DYSITHAMNUS MENTALIS SUFFUSUS, subsp. nov. 



Olive-sided Antvireo 



Type. — No. 238043, adult male, U. S. National Museum, Biologi- 

 cal Survey Collection, from Mount Pirri (at 4,000 feet altitude), 

 eastern Panama; collected May 6, 1912, by E. A. Goldman (collec- 

 tor's number 15676.) 



Distribution. — Known from upper slopes of Mount Pirri only. 



SubspeciHc characters. — Males most like typical mentalis but much 

 less yellow below, more as in septcntrionalis, pale grayish white 

 of under side of neck extending farther back (over front of breast) ; 

 sides, breast and body much, more extensively olive green, limiting 

 the yellow mainly to abdomen ; flanks dull olive green ; under tail 

 coverts dull yellow or yellowish buffy ; the female most like that of 

 semicinercus from Bogota but top of head rather duller rusty and 

 rest of upper parts more greenish olive (less tinged with brownish) ; 

 breast and sides of body dingy brownish olive-greenish, becoming 

 browner on flanks and buffy on under tail coverts ; abdomen light 

 yellow washed with brownish olive from sides ; size large. 



Measurements of type. — Wing, 62; tail, 40; culmen, 16; tarsus, 



19-5- 



Remarks.- — The type of D. m. septcntrionalis from Vera Paz, 

 Guatemala, is a much paler and grayer bird than the large series 

 from Costa Rica and western Panama which have been referred to 

 it. Should more material from Guatemala show that this difference 



