4:C)'2 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Young. — Essentially like adults but streaks on throat and chest 

 obsolete and yellow of abdomen, etc., duller (more buffy). 



Costa Rica (Barranca; Dota; San Mateo; Buena Vista; Naranjo; 

 Azahar deCartago; Cariblanco de Sarapi(|ue; Las Cuadras de Mojon; 

 Carillo), and Panama (Loma del Leon; Panama City; Boquete; Calo- 

 vevora; Chitra; Yolcan de Chiricjui). 



Mioncctes stiiaticollis (not Muscicapa striaticollis D'Orbigny and Lafresnaye) Law- 

 rence, Ann. Lye. N. Y., viii, 1862, 328 (Lion Hill, Panama R. R.). — Sclater 

 and Salvin, Proc. Zool. Soc. Lond., 1864, 358 (Lion Hill; crit.). 



Mioncctes olivaceus Lawrence, Ann. Lye. Nat. Hist. N. Y., ix, 1868 (pub. Mar., 

 1869), 111 (Barranca and Dota, Costa Rica; coll. U. S. Nat. Mus.).— Frant- 

 zius, Journ. fur Orn., 1869, 307 (Costa Riea).— Salvin, Ibis, 1869, 314, in text 

 (crit.); Proc. Zool. Soc. Lond., 1870, 196 (Calovevora, Chitra, Boquete de 

 Chitra, and Volcan de Chiriqui, Panama). — Boucard, Proc. Zool. Soc. Lond., 

 1878, 63 (San Mateo, Costa Rica).— Ridgway, Proc. U. S. Nat. Mus., vi, 1883, 

 414 (Costa Rica). —Sclater, Cat. Birds Brit. Mus., xiv, 1888, 112 (Buena Vista 

 and Barranca, Costa Rica; Chitra, Calovevora, Volcan de Chiriqui, and Lion 

 Hill, Panama). — Salvin and Godman, Biol. Centr.-Am., Aves, it, 1888, 22, 

 part (Costa Rica and Panama localities and references). — Bangs, Proc. New 

 Engl. Zool. Club, iii, 1902, 35 (Boquete, Panama, 4,000 to 5,800 ft.). 



[Mioncctes] olivaceus Sclater and Salvin, Nom. Av. Neotr., 1873, 47, part. — 

 Sharpe, Hand-list, iii, 1901, 114, part. 



Genus LEPTOPOGON Cabanis. 



Lcptopogon Cab.\m.s, Wiegmann's Archiv. fiir Naturg., 1844, pt. i, 275. (Type, 

 L. supcrcUiaris Cabanis.) 



Small Tyrannida> (wing about 53-71 mm.) with rather long and very 

 narrow bill (its width at anterior end of nostrils equal to not more than 

 half the distance from nostril t(i tip of maxilla, and but little more than 

 its depth at same point), conspicuous rictal bristles, and tail equal to or 

 longer than distance from bend of wing to end of secondaries. 



Bill nearly as long as head, its upper and lower outlines approxi- 

 mately parallel, its lateral outlines straight and converging gradually 

 (the vertical profile narrowly wedge-shaped), its width at anterior end 

 of nostrils eciual to not more than half the distance from nostril to tip 

 of maxilla and but slightl}" exceeding its depth at same point; exposed 

 culmen decided^ longer than middle toe without claw, indistinctly 

 ridged, straight to near tip, where rather abruptly decurved, the tip of 

 maxilla distinctly uncinate; gonys much longer than mandibular rami, 

 straight or very slightly convex; maxillary tomium straight, dis- 

 tinctly notched subterminally. Nostril mostly exposed, longitudi- 

 nally linear or narrowly elliptical, distinctly operculate. Rictal bristles 

 well developed, about half as long as bill, the feathers of chin and 

 frontal antiae with distinct though slender bristle-like points. Wing 

 rather long and pointed, the longest primaries exceeding secondaries 



