( 285 ) 



latter genus than into Thamnophilus. At any rate they must be placed close 

 together, as they agree perfectly in structure and style of coloration. 



/>. i/iccrtus seems to be strictly confined to the vicinity of Para. T. htoniatnH 

 Ridgw.,* from Sautarem, is evidently the same as D. schistaceus. Of the latter 

 species I compared specimens from Borba, which I cannot distinguish from Bolivian 

 skins. What the so-called Tliamnopliilas simplex '[ from Santarem may be, I 

 cannot say, but it is certainly not D. liimplex, which never gets a black head. 



37. * Thamnomanes caesius (Temm.). 



Mn.n,„ii„ r„emi Temminck, Rfr. PI. r„l. livr. :! (October 1820) tab. 17. f5g. 1 (S)- 2 (?) [■ au 

 Rrusil et a la Guiane." — Temminck got his birds from the Prince of WieJ, and therefore we 

 may regard .S'"«///-«(s/(')-« BnixilX as the typical locality. Moreover, the description suits the 

 Brazilian form much better, as there is no mention of a white interscapular patch]. 



Latiius caesiun Lichtenstein, Verz. Diibl. Berltiin- Mits. (1823) p. 46 descr. (J part ; J . 



One immature <S and one ? from Igarape-Assii, 50 m. elevation. 



The male shows still some remains of the young plumage in having the greater 

 series of the upper wing-coverts olive-brown with rusty edges and the secondaries 

 mostly brownish. On the back there are some olive-brown feathers, and the middle 

 line ot^the abdomen is rnsty. Otherwise it agrees with adult males of T. caesius, 

 from S.E. Brazil, and presents no trace of the white interscapular patch which is 

 so prominent in the allied T. glaucus Cab. 



The female of T. caesius differs from that of the latter species in the following 

 particulars : the upper surface is of a clear olive-brown, much less rufous ; the 

 abdomen and under tail-coverts are of a much paler ferruginous, the whole breast 

 being dirty brownish buff, whereas in T. glaucus the deep ferruginous colour of the 

 abdomen reaches as far as the fore-neck. 



I may remark that, while the male of T. caesius possesses no wliite dorsal 

 blotch, it is very well developed in the female, ([uite as large as in 7". gUuicus ; in 

 tiie hitter species both se.xes have the white dorsal patch. 



It is very interesting to find T. caesius at Para instead of T. glaucus, which 

 one wonki have expected to occur there. It may be remembered, however, tiiat the 

 former species has already been collected by Natterer on the Rio Madeira, and lately 

 I saw specimens which were procured on tlie Rio Jnrua in N.W. Brazil. 



No. 11)19. 6 jr., Jaunary 20, 1U04. Al. 71 ; caud. (i6 : rostr. 17 mm. 



No. 104s. ?, .January 27, 1904. AI. 72 ; caud. (i4^, ; rostr. 17 mm. 



38. Myrmotherula spec. 



ihji-mi.thrnila lunrxwelli Sclater & .Salvin. /'. Z. N. 18C,7. p. 570 (Capim River— one female). 



One ?, April 5, 1904. No. 2033. Al. 52 ; caud. 23 ; rostr. 15 mm. 



It agrees in colour and size with the specimen collected by Wallace on the 

 Cajiim River, near Para. They are much like the female of M. haujivelli, bur 

 ditfer at once by lacking the white interscajmlar blotch, which is always very well 

 developed in the latter bird. Jlost likely they represent a new form, but it is liot 

 advisable to name it without knowing the male. 



• Proe. U. S. Nat. Mtis. x. 1887 (18S.S). p. 522. 



f Riker .t Chapman, Auk 1K!)1. p. 28. 



\ '• Icli crhiclt ihn zuerst sUilUch am FIu.ssc Iritibii, iu den Waldungen von Villa Xova de Bcnevente 

 [buth in Espiritu Santo], spiiter auoh im Sertong der Provinz Bahii."— Wied, Jicltriige yatiinj. Brasil- 

 :t. ii. (1831) p. 82S f. 



