670 BULLETIN 50, UNITED STATES ISrATIONAL MUSEUM. 



length (skin), 112; wing, 5T.5; tail (much worn), 16.5; exposed cul- 

 men, 17.5; tarsus, 22; middle toe, 16.5.« 



Young female. — Similar to adults, but brown of upper parts rather 

 lighter and duller; dusky margins to feathers of pileum more disinct; 

 scapulars and interscapulars also with narrow terminal margins of 

 dusky; middle and greater wing-coverts with very small terminal 

 spots of light buffy brown; brown of flanks, etc., lighter than in 

 adults and indistinctly barred with dusky; gray of breast, etc., paler 

 and broken by light- ))rown tips to the feathers. 



Isthmus of Panama, from Panama Railroad to Chiriqui (Bq^uete), 

 Veragua (Santa Fe; Santiago), and southwestern Costa Kica (Boruca). 



Ciiphorinus hamhla? {not Formicarius hamhla Boddaert) Lawrence, Ann. Lye. 

 N. Y., vii, 1861, 320 (Lion Hill, Panama R. R.). 



C'i/2j}iorinus jjJiiloineln (not of Salvin) Lawrence, Ann. T,yc. IST. Y., vii, 1862, 467 

 (Lion Hill, Panama R. R. ). 



Microcerculus philomela Bairt), Review Am. Birds, 1864, 114, part (Panama R. R. ). 



Microcerculus luscinia Salvin, Proc. Zool. Soc. Lond., 1866, 69, 71; 1867, 134 

 (Santa Fe and Santiago, Veragua). — Salvin and Godman, Biol. Centr.-Am., 

 Aves, 1, 1880, 77, pi. 5, fig. 4.— Sharpe, Cat. Birds Brit. Mus., vi, 1881, 298.— 

 RiDGWAY, Proc. U. S. Nat. Mus., xvi, 1893, 609 ("Burica," (. e., Boruca, 

 s. w. Costa Rica; descr. female; crit. ). — Cherrie, Expl. Zool. Merid. Costa 

 Rica, 1893, 6 (Boruca; descr.); Expl. Zool. Val. RioNaranjo, 1893, 9 (Boruca; 

 descriptions). 



{Microcerculus'] luscinia Sclater and Salvin, Nom. Av. Neotr. , 1873, 6. 



Microcerculus acentetus Bangs, Proc. New Engl. Zool. Club, iii, Jan. 30, 1902, 56 

 (Boquete, south slope Volcan de Chiriqui, 5,000 ft. alt.; coll. E. A. and 0. 

 Bangs). 



Genus LEUCOLEPIS Reichenbach. 



Cyphorhmus^ (not Cyphorhina Lesson, 1843 c) Cabanis, in Wiegmann's Archiv. 



fiir Naturg., x, pt. i, 1844, 282. (Type, C. thoracicus Tschudi.) 

 Cyphorinus (emendation) Sclater, Cat. Am. Birds, 1862, 19. 

 Leucolepis Reichenbach, Avium Syst. Nat., 1850, pi. 57 (type, Formicarius 



musicus Boddaert). 

 Leucolepia (typographical error) Richmond, Auk, xix, Jan., 1902, 92, in text. 



Small or medium sized Troglodytidse (wing, 58-70 mm.) with 

 wedge-shaped compressed bill, the mesorhinium strongly elevated and 

 arched; mandibular rami equal to or longer than gonys, strongly bent 

 and deflexed basally; nostril small, circular, rimmed, opening through 

 center of nasal fossa, and tail little, if any, more than half as long as 

 wing. 



Bill nearly as long as head, wedge-shaped, compressed, its depth at 

 latero-frontal antiae equal to much more than one-third (sometimes 



« One specimen, from Panama, 

 ^"^•uipojgibba, £zV nasus." 



<' Cyphorhina Lesson, L'Echo dii Monde Savant, ser. 2, vii, June 15, 1843, col. 1068. 

 (Type, Podargus papuensis Quoy and Gaimard.) 



