670 THE GENUS FOKMICARIUS RIDGWAY. 



/; '. Forehead 1)ri,i:;lit tawny or nilescont, like crown, etc. (Brazil. ).l. F. carjancnsis. 



h '-. Forehead hhick or dusky. (Amazon Valley. ) 2. F. u'lfirifrons. 



a^. Top of head dull hrowniah, not con.spieuously dili'erent IVoui color of back or 

 else black; outer web of exterior feather of alula grayish brown. 

 b '. Chest black or some shade of grayish or grayish brown. 

 c K Sides of neck similar in color to hind neck, uot rufesceut or cinnamonieous. 

 (IK Top of head brown, like back, with only centers of feathers blackish; 

 chest slate-gray, in contrast with black of throat; smaller. (I'pper 



Amazon Valley, Bolivia to northeastern Peru.) 3. F. analin. 



dK To]) of head, also chest, black; larger. (Pacific coast district, from west- 

 ern Ecuador to Costa Rica. ) 4. F. riifiricapiUtis. 



c'-. Sides of neck rufesceut or cinnamonieous. 



fZ', Tinder tail coverts wholly tawny, rusty, or chestnut, 

 c'. Forehead concolor with crown, — not rufesceut. 

 /'.Whit*' loral spot large, consi)icuous; under parts clear brownish gray, 

 becoming nearly white on belly; under tail coverts clear tawny. 



(British Guiana.) o. F\ crinsalis, 



/-. White loral spot snuiU, sometimes obsolete; under parts nearly uni- 

 form deep brownish gray; under tail coverts rufous-tawny. (Trini- 

 dad, Venezuela, and coast of Colombia.) 6. F. satiiraius. 



e^. Forehead distinctly rufesceut, different from crown. (Under tail coverts, 

 as in /'". crissalis; general color of under i)arts much browner than in 

 either /''. crissalix or F. saturatus.) (Isthmus of Panama, north to 



western Costa Rica.) 7. /'. hoffmanni. 



d'^. Under tail coverts only partly (if at all) tawny, rusty, or chestnut, the 

 longer (jtosterior) feathers being dusky margined with brown, 

 e^ No rusty collar across fore neck. (Eastern Costa Rica and Nicara- 

 gua. ) 8. F. ion hrosiis. 



e^. A distinct rusty collar across foi-e neck. 



f . Darker; rusty brown above, the pileum much darker. (Eastern Mex- 

 ico, Guatemala, and British Honduras.) 9. F. monilujer. 



/^. Paler ; light grayish brown above, the top of head not darker. (Yuca- 

 tan.) 10. /•'. paJlidiifi. 



h ■^. Chest rufous or chestnut, 

 c'. Top of head rusty brown; chest chestnut-rufous. (N'eragua; Ecua- 

 dor. ) II- i' ■ riifipccins. 



c^. Top of head black; chest <lark rufous or chestnut. (Eastern Ecuador.) 

 12. F\ thoriudcus. 



Formicarius cayanensis Boddaert. 



Formicarius cayanensin Bodd., Tabl. P. E., 1783, 50 (based on Le Tetema, de Cayenne 

 Bull., P Enl., 821).— (JRAY, (ien. B., i, 211; IIand-1. i., 1869, 298, No. 4418.— ScL., 

 P. Z. S., 18r>7, 46 (Guiana; Brazil); 1858,277 (Cayenne; Brit, (hiiana; north 

 and southeast Brazil). 

 Formicarius caneimcnsix ScL., Catal. 1862, 190 (Brazil).— Salv., P. Z. S., 1866, 74 (Gui- 

 ana; Cayenne; Brazil).— Pki-Z., Orn. Bras., ii, 1868, 168 (Brazil).— SCL. and 

 Salv., Nom. Neotr., 1873, 75. 

 Mjirmornis caijennensis Cab. and IIkin'k, Mus. lleiu., ii, 1859, 7 (Brazil). 

 Ttmlns colma Gmkl. S. N., i, 1788, 827. 

 Myrmothera colma Vieili., Enc. Me'th., 1723, 681, 683. 

 Mlliothera colma Cab. in Schomb. Guiana, in, 1848, 686., Bonap.- Cousp., i,1850, 



205(s. Brazil). 

 Formicarius colma i^CU, Cat. B. Brit. Mus., xv, 1890, 302 (Sao Paulo, Bahia, and 

 Boutheast Brazil; I'eruif) 



