(2 <cj 7 ~Ljl. r im 
2a ClM^2 _ /i^j do v (92<yi2-^2i-eA. , 
^-cn_ y-M. •**-* ^-*-v - ^TB^e-U -, , 
Horizopus, 1 nom. nov. 
Syrickta Bonaparte, Ann. Sci. Nat. sSr. 4, Zool. I, 1854, 133 (nec 
Syrichtus Boisduval). 
Cotilopus Cabanis, Journ. f. Orn. 1855, 479 (nec Contipus de Marseul). 
Type, Muscicapa virens Lin me us. 
Chars, gen. — Similar to Empidonax, but tarsi much shorter, wings 
longer and much more pointed. 
Geographic Distribution. — North America, except the most northerly 
portions; Mexico; Central America; northern and western South Amer- 
ica as far south as the Province of Tucuman, Argentine Republic. 
Horizopus pertinax (Cabanis). 
Contopus pertinax Cabanis, Mus. Hein. II, 1859, 72. 
Geog. Dist. — Guatemala and southern Mexico. 
Horizopus pertinax pallidiventris (Chapman). 
Contopus pertinax pallidiventris Chapman, Auk, XIV, 1897, 311. 
Geog. Dist. — Mountainous areas of northern Mexico, central and south- 
ern Arizona. 
1 opitm, limito; n-ovs, pes. 
Agrees with lugubris, in having the wings relatively shorter 
than in the other species . 1 
Horizopus virens ( Linnaeus ). 
Muscicapa virens Linnaeus, Syst. Nat. ed. 12, I, 1766, 327. 
Muscicapa querula Vieillot, Ois. Am. Sept., I, 1807, 68, pi. 39 (nec 
Wilson). 
Muscicapa rapax Wilson, Am. Orn. II, 1810, 81, pi. xiii, fig. 5. 
Contopus albicollis Lawrence, Ann. N. Y. Acad. Sci. Ill, 1885, 156. 
Geog. Dist. — Eastern North America, north to southern Canada and 
Newfoundland, west to the Plains; south in winter through eastern 
Mexico, Central America and Colombia to Ecuador. 
1 Contopus plebeius Cabanis, Mus. Hein. II, 1859, 71, possibly belongs in 
this vicinity, but it has not been possible satisfactorily to indentify the species. 
