( 60) 



the many specimens examined possess the characteristic while dorsal patch, which 

 is altogether wanting in the 3 3 of T. c. caesius, T. c. hoffmarmsi, and T. e. 

 persimilis. 



Material : 3 <?(?, 2 ? ? , Cayenne ; 2 3 3, 2 ? ? , Snrinam ; 3 ? , Brit. Guiana ; 

 4 33, 3 ? ?, Orinoco ; 11 33, 10 ? ?, Caura River; 7 <?d\ 5 ? ?, Rio Negro ; 

 <? ?, Rio Nap i, Ecuador ; 3 ¥ , Bogota ; 1 3 ad., 1 c? juv., 3 ? ? , Pebas ; 2 cJ c? ad., 

 1 3 juv., Yuracares, Bolivia (D'Orbiguy coll. — Paris Museum). 



Obs. Whether the ? from Santarern, recorded supra, p. 17, belongs to this 

 or to the preceding form cannot be decided until adult males come to hand. 



59. Myrmelastes fortis (Scl. & Salv.) 



Percnostola forth Sclater & Salvin, /\<?.S. 1867. p. 980 (Pebas and Chyavetas, E. Peru). 



Nos. 781, 883. 3 3 ad., 8, 23. vi. 06. "Iris red or red-brown, feet and bill 

 black, bare skin behind the eye light blue." — Wing 83, 84 ; tail 70, O'J ; bill 23, 22; 

 tarsus 32, 331 mm. 



No. 884. ? ad. 23., vi. 06. " Iris red-brown," soft parts as above. — Wing 82 ; 

 tail 07 ; bill 23 ; tarsus 32 mm. 



These skins are exactly similar to others from N.E. Peru ; perhaps the wings 

 average slightly shorter. One of the males has the first primary narrowly edged 

 with white. 



About the systematic position of the species cfr. Meuegaux and Hellmayr, Bull. 

 Soc. Pkilomat. Paris, 1906, p. 32. 



Prof. von. Ihering has lately recorded a specimen from the Rio Jnruil.* 



60. Cercomacra sclateri Hellm. 



Ctrcomacra sclateii Hellmayr, Not. Zool. xii. p. 288 (Chyavetas, Peru). 



No. 850. 3 ad., Teffe, 17. vi. 00. " Iris grey, feet blue-grey, bill black." 

 Agrees in the 2>»leness of the coloration with the examples from Para and 

 Santarem, but has slightly longer wings. 



61. Formicivora bicolor Pelz. 



Cfr. Nov. Zool. supra p. 17. 



No. 851. ? ad., 17. vi. 06. " Iris brown, feet bluish grey, bill black." — Wing 

 63; tail 50; bill 14 mm. 



Agrees perfectly with the females from Santarem, in being uniform chestnut 

 below, and iu having the apical half of the three outer tail feathers white. 



62. Rhamphocaenus melanurus amazonum n. snbsp. 



Rhamjjhocaenus melanurus (nee Vieillot !) Sclater & Salvin, P.Z.S. 1867. p. 751 (Chyavetas, Peru). 

 R. albiventrit Sclater, Jbis. 1883, p. 95 (part. : Chyavetas ; but not the diagnosis !) : Taczanowski, 



Orn. IVr.u, ii.(lH84) p. 53 (part.: Tarimaguas); Sclater, Cat Birds Brit. Mas. xv. (1890) p. 260 



(p.-trt. : spec. /', g from Chyavetas and Santa Cruz, Peru). 



No. 863. 3 ad., 20. vii. 06. "Iris brown, feet bluish grey, bill black, below 

 pale grey." — Wing 52 ; tail 53 ; bill 23 mm. — Type of the subspecies. 



Resembles /.'. m. albiventris Scl. of Surinam and British Guiana, in having the 

 cheeks and ear-coverts pale brownish streaked with whitish, but is slightly larger, 



• Revitt. 3fus. Pautift. vi. 1904 (publ. 1905). p. 412. 



