( 342 ) 



No. 911. ? ad., Marnins, 7. vi. 1908.— Wing 68; tail 57J -. bill ITi mm. 



" Iris brown, feet plumbeous, bill black." 



Agreeing well with examples from Para aud Maranhfio. T. amazonicus and 

 T. cinereiceps Pelz.,* from the Upper Orinoco and Rio Negro, are so very nearly 

 allied (the females differ merely in size) that one would naturally expect them to be 

 geographical representatives, but both are said to occur in French Guiana.f All the 

 examples I have examined from this country were, however, clearly referable to 

 T. amazonicus, and the record of T. cinereiceps appears to be open to doubt. 



205. Thamnophilus doliatus subradiatus Berl. 



l^Lanius <io/««/KS Linnaeus, iltis. Adotphi Frid. II. Prodrnm. p. 12 (17tj4. — loc. iga. ; we substitute 



Surinam).'] 

 ThamiophilKi stibralintiis Bsriepsch, Jouni.f. Orn. 1887. p. 17 (Upper Amazinia : the typeinMus. 



H. V. B. is from Iquitos, N.E. Peru). 

 T. doliatus subradidti-i Hellmayr, Nov. Zool. xiv. 1907. p. 370 (Humaytha). 



No. 430. S ad., Calama, 19. viii. 1907.— Wing 74 ; tail 65 ; bill 19 mm. 



No. 820. S juv., Marmellos, 17. xii. 1907. 



Nos. 621, 670. ? ? ad., S. Isabel, Rio Preto, 4, 16. x. 1907.— Wing 71, 74 ; 

 tail 58, 60 ; bill 18^, 19 mm. 



"Iris yellowish white or pale yellow, feet light plumbeous, bill black (:?), 

 dark grey ( ? )." 



This form ranges from Northern Peru through Western Brazil to the Rio 

 Madeira, where it is found on both sides. 



206. Dysithamnus schistaceus schistaceus (D'Orb.). 



Thamnophilus schistaceus D'Orbigny, ]'vi/a!je, (Jisauu: p. 17U (1838. — Yuracares, Bolivia) ; Pelzeln, 



Zur Oni. Bras. ii. 1868. p. 77 (.Salto do Girao, Borba). 

 Dysithamnus s. schistaceus Hellmayr, Nov. Zool. xiv. 1907. p 370 (Humaytha, Borba). 

 D. capitalis (nee Sclater) Snethlage, Journ. f. Orn. 1908. p. 510 (Villa Braga, Tapajdz — $ , examined 



by me). 



Nos. 22, 41, .52, 199. SS ad., Calama, 11, 14, 16. vi., 10. vii. 1907.— Wing 

 62— 65; tail 51—54 ; bill 16—17 mm. 



No. 353. c? imm., Calama, 8. viii. 1907. — Wing 63 ; tail 55 ; bill 17 mm. 



Nos. 634, 714. ^S ad., S. Isabel, Rio Preto, 7, 17. x. 1907.— Wing 65, 62; 

 tail 54, 50 ; bill 17 mm. 



No. 871. 6 ad., Marmellos, 26. xii. 1907.— Wing 63; tail 50 ; bill 17 mm. 



No. 633. ? ad., S. Isabel, 7. x. 1907.— Wmg 64 ; tail 54 ; bill 16^ mm. 



No. 10.53. ? ad,, Maruins, Machados, 22. vii. 1908.— Wing 65 ; tail 55 ; bill 

 17 mm. 



" Iris red, feet plumbeous, bill black, below grey." 



The series agrees with specimens from the Rio Puriis and Tapajoz. Some of 

 the adult males are uniform cinereous below, others have the middle of the belly 

 variegated with whitish. In most of them the pileum is uniform slate-grey ; bnt 

 two specimens (Nos. 22, 52) approach the newly described />. capitalis sgi/amosus 

 Suethl.,J from the left bank of the Toi;antius, in having the feathers of the cap 

 distinctly centred with black, though to a lesser degree than in the type kindly lent 

 by Miss Snethlage. This form is, of course, more nearly related to D. s. schistaceus 



• Zur Orn. Bras. ii. p. 145 (1868. — Marabitanas and Rio Uaup^, Rio Negro). 



t Ct. ('at. Birds Brit. Mul. xv. pp. 193, 201. 



X Ornith. Monatster. xv. Oct. 1907, p. 1G2 (Alcoba5a, left bank of Tocantins). 



