161) NOVITATES ZOOLOGICAE XXI. 1014 



Museum, that from S. Francisco (No. 2) has a few distinct strijjes, while the other 

 (No. 3), like the type of '). colondria, has the sides of the body devoid of dnsky 

 markings. The same variatiim may be observed in the series from Paraguay and 

 N.W. Argentine. 



From what I have said in the preceding lines it will be seen tliat the inhabitants 

 of the sources of the Rio Pilcomayo are in every respect identical with the birds 

 from Tnrumiin and Corrientes. M. herrmanni becomes, therefore, a synonym of 

 O. calaiulrid. which was not even mentioned by Dr. Reichenow when describing his 

 sujiposeil novelty. 



Birds from the lower stretches of the Rio de la Plata (provinces of Buenos 

 Aires and Entrerios, Uruguay), which are to be considered as typical J/, m. modulator, 

 are generally larger, and have a much stronger, heavier bill, so that the recognition 

 of a northern race, 217. modulator calandria (Lafr. & Orb.) seems desirable. Thus 

 we have : 



{a) Mimus modulator modulator (Gould). 



Southern Brazil : Rio Grande do Sul ; Uruguay (Montevideo, Maldonado, 

 C'oncepcion, Paysandu) ; Eastern Argentine: i)rovinces of Buenos Aires (Flores, 

 Zaraora, Espartillar, etc.), and Entrerios (La Soledad). 



(i SS from Buenos Aires . . AVing 118-121 ; tail ll.j-122 ; bill 2(I-2U mm. 

 1 <? from Entrerios . . . Wing 117; taill22 ; bill 2it mm. 



(b) Mimics modulator calandria (Lafr. & Orb.). 



Paraguay (Paragnari, Asuncion, etc.) ; Central and Western Argentine : 

 Corrientes, Cordova, Salta, Tucuman ; S.E. Bolivia : sources of the Rio Pilcomayo 

 (Caiza, S. Francisco). 



1 tS from Corrientes (type of 



0. calandria) . . . Wing 111 ; tail 114; bill 18^ mm. 



(i cJ <^ from Tncumtin . . . Wing llu -118 ; tail 1 15-128; hill 18-19 mm. 



: (J from Salta .... Wing 115; tail 119; bill I8i mm. 



3 cJ (J from Paraguay . . . Wing 1 1(1-117 ; tail 112-125 ; bill 1 TA-l!) mm. 



2 (Jc? from S.E. Bolivia (to])0- 



types of J/, herrmanui) . Wing 114, 117 ; tail 125, TJCi; bill l^i, 1'.) mm. 



74. Myiodioctes meridionalis Pelz. should be Basileuterus nigrocristatus 



meridionalis (Pel/,.). 



Miliddioeles iiLfriiUuimliD Pelzeln, Verhdl. Ziiul. Bot. Got. Wiin 32, p. 441"! (1S82. — Ecuador; Salis- 

 Seewis coll.); Sharpe, Cut. B. Bril. .l/».v. 10, 1885, p. 4.37 (e.\ Pelzeln); Ridgway, Bull. U.S. 

 Mux. :)0, ii. 1902, p. 704, footnote (ex Pclzcln). 



■■ Mij'mUncIeK pusillun'f" Pelzeln, Verhdl. Zool. Bui. Ges. Wien 2(j, 187(1, p. 7(j!l (Ecuador). 



No. 1. Vienna Museum, No. : " 1883. v. 15. 



Mijiodioctes meridioiKilis Pelz. n. sp. Ti/pi\ 



Von Graf Salis-Seewis in Tauscli. I<]cuador," 



Adult Wing 59* ; tail 55; bill 12 mm. 



No. 2. Vienna Museum, No. : " 1870. xvii.24(28). 



Myiod. meridionalis Pelz. Von Prof. T. 



Frigerio in Tausch. Ecuador," Adult . . Wing 58; tail 57 ; bill 12 mm. 



The type of Mi/iodioctes meridionalis, on examinatiim, jiroves to be widely 

 diti'ereut from the members of the genus Wilsonia (olim Mi/iodioctes), which is not 



