321._Pseudocolaptes_ 1 | Columbia to Peru | 322. _Homorus_ | 3 | Brazil, Bolivia, and | | | La Plata | 323. _Thripadectes_| 1 | Columbia | 324. _Ancistrops_ | 1 | Upper Amazon | 325. _Automolus_ | 9 | Mexico to Amazonia | 326. _Philydor_ | 14 |Tropical South America| | | | 327. _Heliobletus_ | 1 | Brazil | 328. _Anabatoides_ | 1 | Brazil | 329. _Anabazenops_ | 5 | Mexico to Brazil | 330. _Xenops_ | 3 | Trop. North and South| | | America | 331. _Sittasomus_ | 3 | Mexico to Ecuador and| | | Brazil | 332. _Margarornis_ | 4 | Costa Rica to Peru | | | and Bolivia | 333._Glyphorhynchus_ 1 | Trop. North and South| | | America | 334. _Pygarrhicus_ | 1 | Chili | 335. _Dendrocincla_| 10 | Mexico to Venezuela | | | and Brazil | 336._Dendrocolaptes_ 7 | Guatemala to Peru and| | | Brazil | 337. _Nasica_ | 1 | Guiana | 338. _Drymornis_ | 1 | La Plata | 339._Xiphocolaptes_| 5 | Mexico to Bolivia and| | | Paraguay | 340._Dendrexetastes_ 2 | Guiana | 341. _Dendrornis_ | 14 | Mexico, W. Ecuador | | | and Brazil | 342. _Dendroplex_ | 2 | Columbia & Venezuela | | | to Brazil | 343. _Picolaptes_ | 14 | Mexico to Bolivia and| | | La Plata | 344._Xiphorhynchus_| 4 | Veragua to Brazil | | | | FORMICARIIDÆ. | | | 345. _Cymbilanius_ | 1 | Amazonia and Guiana | 346. _Batara_ | 1 | S. Brazil | 347. _Thamnophilus_| 47 | Trop. North and South| | | America | 348. _Biatas_ | 1 | Brazil | 349. _Thamnistes_ | 2 | Central America and | | | Ecuador | 350. _Pygoptila_ | 2 | Amazonia | 351. _Neoctantes_ | 1 | Amazonia | 352. _Clytoctantes_| 1 | Eastern Ecuador | 353. _Dysithamnus_ | 12 | Mexico to Bolivia and| | | Brazil | 354. _Thamnomanes_ | 2 | Ecuador, Guiana, and | | | Brazil | 355._Herpsilochmus_| 4 | Venezuela to Brazil | | | and Bolivia | 356. _Myrmotherula_| 21 | Tropical S. America | 357.