( 64 ) 



No. 810. i ad., 12. vi. 00. " Iris light brown, feet greyish brown, bill black."— 

 Wing 69; tail 49; bill 17 mm. 



No. 735. ? ad., 1. vi. 06. "Iris dark brown, bill black, below grey." — Wiug 

 73^ ; tail 55 ; bill 17 mm. 



These birds represent typical 1). ardesiacus. .No. 810 has the throat feathers 

 black, broadly margined with schistaceous at the tips, jnst as specimens from East 

 Ecuador and Northern Peru. In No. 730 the throat is almost uuiform schistaceous, 

 except a few blackish dots here and there. No. Sill shows a small concealed white 

 dorsal spot, which is altogether wanting in the two other skins. 



Cfr. Hellmayr, Verkandl. zool. hot. Gesellsch. Wien, 1903, pp. 215— 216. 



New to the Brazilian fauna. 



58. Thamnomanes caesius persimilis subsp. nov. 



Nos. 074, 772. <?<? ad., 21. v., 7. vi. 00. "Iris brown."— Wing 09, 70; tail 

 61,04; bill 17, 18 mm. 



No. 099. (? fere ad., 24. v. 06. " Iris brown."— Wing 09 ; tail 001 ; bill 18 mm. 



Nos. 672, 688, 773. ? ? ad., imm. "Iris brown."— Wiug 71; tail 01, 631, 

 65; bill 17, 17i mm. 



S ad. Very much like T. c. kqffmannsi Hellm., of Para, but differs in the 

 darker bine-grey colour of the plumage ; by lacking the white streaks on the throat 

 and ear-coverts, and by having the edge of the wing dark bluish slate-grey (instead 

 of white). T. c. caesius (Temm.), of Bahia, which agrees in the two last-named 

 characters, is of a much darker, dull blackish slate-grey colour throughout. 



? ad. Indistinguishable from that of T. c. glaucus Gab., but very different 

 from the females of T. c. caesius and T. c. hofmannsi by having the breast and 

 abdomen deep ferruginous, only the throat and foreneck being brownish mixed 

 with buff 



Type of the subspecies : c? ad. Teffe, 21. v. 06, No. 074 in the Tring Museum. 



The three cTcT sent by Mr. Hoffmanns present very little variation. 



In the type (No. 074) the general colour is an intense bluish grey, the axillaries 

 and under wing-coverts are cinereous, chin and throat quite uniform without any 

 pale streaks. The two other c?c? have white axillaries and under wing-coverts ; a 

 few narrow whitish lines on the chin, and the plumage of a rather lighter blue-Tey. 

 In none of the three specimens is there any trace of a white dorsal spot. In the 

 type the entire bill is deep black, while the others have the lower mandible pale 

 brown. 



The three females agree in every respect with a large series of T. c. glaucus, 

 and have a large concealed white patch in the middle of the back. The upper parts 

 are perhaps somewhat less rnfesceut. 



In the followiug lines I append a short resume of the characters and ranges of 

 the four known forms of Thamnomanes, which I hope will prove to be useful to the 

 students of this rather difficult group. I may remark that the females of all 

 these forms possess a distinct white interscapular blotch. 



a. T. caesius caesius (Temm.) 



'' '/'" catiia Tc-mminck, Sec. PI. col. livr. ;!. tab. 17. tig. 1, 2 (Oct. 1820.— South-east Brazil ; cfr. 



-Voi'. Z-mI . xii. p. 285). 



Hob. South-eastern Brazil : Bahia (Wied, Wucherer, Kammerlacher) ; Rio 

 Iritiba and Villa Nova de Beuevente, Espiritu Santo (Wied;. 



