BIRDS OF NORTH AND MIDDLE AMERICA. 655 



throat, the chest obsoletely streaked with ohve. (All the species 

 with a concealed patch of yellow on crown, exce])t in young, a whitish 

 or pale dull bully superciliary stripe and, except in M. hairdi, a similar 

 malar stripe, and a dusky loral stri}>e extendini^; to and includino; the 

 latero-fnmtal antia?.) 



Xul if cation. — Xest (t)f .1/. luteiventris) in lioles of trees, composed 

 of small twiujs, dry leaf-stems, etc. Es;gs huffy, blotched and spotted, 

 chiefly roimd larger end, with deep purplish brown, lavender, etc. 



Range. — Southwestern border of Ignited ^States (Arizona) to Peru, 

 Paraguay, southeastern Brazil, etc. (About six species and sub- 

 species.) 



Notwithstanding the great ditl'erence in form of the bill between 

 M. cJirysocephalus and 21. hemichrysus on the one hand and M. hairdi 

 and M. lutewentris on the other, the difference is so nearl}^ bridged 

 over b}'" tlie intermediate structure of the bill in M. solitarius and M. 

 maculatus that, in the absence of other characters, I am not able to 

 recognize a genus Hypennitres Cabanis. The only alternative, in fact, 

 would be to have four genera instead of one. 



KEY TO THE SPECIES AND SUBSPECIES OF MYIODYXASTES. 



a. Under jiarts conspicuously streaked. 



b. Tail dusky, the rectrices edged with cinnainon-rufous. (Paraguay and Argentina 



to northern Brazil and Cayenne.) Myiodynastes solitarius (extraliniital) « 



bb. Tail cinnamon-rufous, the rectrices with a median stripe (broad only on middle 

 pair) of dusky. 

 c. Superciliary stripe pale yellowish; chin and sides of throat white, narrowly 

 streaked with dusky; under parts of body white, more or less suffused with 

 pale yellow. {Myiodynastes maculatus. ) 

 d. Darker, with streaks on chest, etc., broader. (Venezuela, Trinidad, and 

 Tobago to Amazon Valley.) 



Myiodynastes maculatus maculatus (extraliuutal)& 

 dd. Paler, with streaks on chest, etc., narrower. 



(^Tyrannus solitarius YieiWot, Nouv. Diet. d'Hist. Nat., xxv, 1817, 88 (Paraguay; 

 l)ased on Suiriri chorreado todo Azara, Apunt. Parag., ii, 145, no. 196).— Myiodynastes 

 solitarius Sclater, Proc. Zool. Soc. Lcmd., 1859, 43; Cat. Birds Brit. Mus., xiv, 1888, 

 185. — [Pitangus] solitarius Gray, Hand-list, i, 1869, 357, no. 5432. — Tyrannus audax 

 (not Muscicapa audax Gmelin) Maximilian, Beitr. Xaturg. Bras., iii, pt. ii, 1831. 889; 

 D'Orbigny, Voy. Amer. Merid., Ois., 1839, 149. — Scaphorhynchus audax Tschudi, Fauna 

 Peruana, Aves, 1845, 149; Burmeister, Syst. Ueb. Th. Bras., ii, 1856, 459. 



b Muscicapa inaculata Miiller, Syst. Nat. Suppl., 1776,. 169 (Cayenne; based on 

 Gobc-mouche tachctee de Cayenne Daubenton, PI. Enl., pi. 453, tig. 2). — Myiodynastes 

 maculatus Cassin, Proc. Ac. Nat. Sci. Phila., 1864, 255. — [Pitangus] maculatus Gray, 

 Hand-list, i. 1869, 357, no. 5433. — [Muscicapa] audax Gmelin, Syst. Nat., i, 1788, 

 934 (Cayenne; based on Gobe-mouche tacfietee de Cayenne Daubenton, PI. Enl., pi. 

 453, fig. 2.) — Tyrannus audax Vieillot, Enc. Meth., 1823, 846. — Scaphorhynchus audax 

 Cabanis, in Schomburgk's Reise Brit. Guiana, iii, 1848, 699. — Meqarhynchus audax 

 Heine, Journ. fur Orn., 1859, 342. — Myiodynastes auda.r. Sclater, Proc. Zool. Soc. 

 Lond., 1859, 45; Cat. Birds Brit. Mus., xiv, 1888, \S5.-~Megarynchus regius Thun- 

 berg, Dissert, p. Schaerst., 1824, no. 4 (see Heine, Jour, fur Oni., 1859, 341). 



