4 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



cc. Interorbital septum wanting; postorbital process wanting; maxillo-palatine 

 long, narrow, angulated, continued backward to the level of the median 

 descending plate of the palatine; intrinsic muscles wanting; sterno- 

 trachealis not attached to processus vocal es ; palate schizognathous ; mesor- 

 hinium normal; nostrils not conspicuously operculate; tarsal envelope 



exaspidean Conopophagidse (extralimital) .« 



hh. Metasternum 2-notched; tensor patagii brevis tendon normally passerine. & 



Formicariidae (p. 8). 



aa. Two pairs of tracheo-bronchial muscles; metasternum 2-notched; tarsal envelope 



endaspidean. 



h. Nares schizorhinal; maxillo-palatines long and slender, continued backward to 



or beyond level of the free end of the median descending plate of the palatine; 



interorbital septum perforate; palate schizognathous; outer toe decidedly 



(usually much) shorter than middle toe and not conspicuously longer than 



inner toe (except in Sclerurus and Pygarrhicus) and united to middle toe for 



not more (usually less) than whole length of basal phalanx of the latter; hallux 



(without claw) as long as inner toe (without claw) or longer, much stouter. 



Furnariidae (p. 157). 

 bb. Nares holorhinal; maxillo-palatines short and broad, crossing posterior end of 

 olfactory fossa and terminating immediately in front of the descending plate 

 of the palatine; interorbital septum imperforate; palate segithognathous or 

 semi-desmognathous; outer toe as long as middle toe, much longer than inner 

 toe, united to middle toe for more than whole length of basal phalanx of the 

 latter; hallux (without claw) shorter than inner toe (without claw), little, if 

 any, stouter Dendrocolaptidae (p. 224). 



Family PTEROPTOCHID^. 



THE TAPACTJLOS.e 



=Rhinomydxse D'Orbigny Voy. Am. Merid., iv, part 3, 1839, 192. 

 '^Pteroptochidae Cabanis and Heine, Mus. Hein., ii, 1860, 20 (includes 



Menuridse). 

 =Pteroptochid3e Sclater, Cat. Am. Birds, 1862, 168. — Carui?, Handb. der Zool., 



1863, 268.— Garrod, Proc. Zool. Soc. Lond., 1877, 452.— Stejneger, Stand. 



Nat. Hist., iv, 1885, 476. — Salvin and Godman Biol. Centr.-Am., Aves, ii, 



1892, 246. 

 =Pteroptochinae Cabanis and Heine, Mus. Hein., ii, 1860, 20. — Gadow, Bronn's 



Thier-Reichs, Vog., ii, 1891, 277. 

 =Scytalopodidx Huxley, Proc. Zool. Soc. Lond., 1867, 471, in text. 

 =Scytalopodinx Sundevall, Met. Nat. Av. Disp. Tent., ii, 1872, 65 (English 



translation, 1889, 134). 



Tracheophone Mesomyodian Passeres with the metasternum 

 4-notched; interorbital septum perforate; postorbital processes small, 



a = Conopophaginie Sclater and Salvin, Nom. Av. Neotr., 1873, 41; Gadow, Bronn's 

 Thier-Reichs, Vog., ii, 1891, 277 . = Conopophagid% Garrod, Proc. Zool. Soc. Lond., 

 1877, 452; Forbes, Proc. Zool. Soc. Lond., 1881, 436, 438; Stejneger, Stand. Nat. 

 Hist., iv, 1885, 476; Cope, Am. Nat., xxiii, 1889, 873; Salvin and Godman, Biol. 

 Centr.-Am., Aves, ii, 1892, 245. 



A small group of two genera and about sixteen species, peculiar to South America, 

 from Colombia to Guiana, southeastern Brazil, Bolivia, and Peru. 



ft The returning portion not concealed by the muscular fiber at the origin of the 

 extensor metacarpi muscle, but the two tendons of this portion clearly exposed to 

 view. (See Stejneger, Standard Nat. Hist., Birds, p. 459 and fig. A on p. 458.") 



c A Spanish (Chilean) vernacular name, from the characteristic habit of the various 

 species of this group of carrying the tail conspicuously elevated and thrown forward. 



