FAM. REGULIDZ 15 
10. Polioptila dumicola dumicola (Vieillot) 1). 
Syluia dumicola Vieillot, Nouv. Dict. (nouv. ed.), Vol. 11, p. 170 (1817) (based on Azara no. 158 : Paraguay). 
Culicivora boliviana Sclater, Proc. Zool. Soc. Lond. Vol. 20, 1852, p. 34 (Dec. 1853) (Bolivia; type in Brit. Mus. 
examined ; part. : the specimens obtained by d’Orbigny belong to the next form). 
Fig. Proc. Zool. Soc. Lond. 1852, pl. 47 (type of C. boliviana Sclater). 
Hab, Paraguay ; Argentine Republic, south to Buenos Aires, west to Cordova, Tucuman, Salta; south- 
western and central parts of Bolivia (Caiza, Bolivian Chaco, S. José, Samaipata, Santa Cruz de la 
Sierra); S. W. Matto Grosso (Corumba); Uruguay; South Brazil, State of Rio Grande do Sul (Sad 
Lourengo). 
11. Polioptila dumicola berlepschi Hellmayr. 
Polioptila berlepschi Hellmayr, Novit. Zool. Vol. 8, p. 356 (1901) (Interior of Brazil : northern Sao Paulo, Goyaz, 
Matto Grosso; type locality : Rio das Pedras, on the Rio Parana, northern S. Paulo). 
Hab. Campos-districts of the interior of Brazil : in states of Goyaz (City of Goyaz, Leopoldina), N. W. 
Minas Geraés (Agua Suja), northern S. Paulo (Rio Parana: Rio das Pedras, Itapura), northern 
Matto Grosso (Cuyaba, Chapada, Caxoeirinha, Engenho do Gama); westwards to plains of eastern 
Bolivia (Chiquitos, Moxos). 
12. Polioptila lactea Sharpe 2). 
Polioptila lactea Sharpe, Cat. Birds Brit. Mus. Vol. 10, p. 453 (1885) (« South America », the type is a skin of the 
well-known Rio-make). 
Polioptila melanocephala Bertoni, Anal. Cientif. Paraguayos (Aves Nuev. del Paraguay), p. 143 (1901) (Paraguay : 
interior of primeval forest at 25°40! south lat.). 
Hab. South-eastern Brazil : in states of Rio de Janeiro (Rio) and S. Paulo (Rio Feio, between Ypanema 
and Rio Paranapanema); and Paraguay (Sapucay etc.). : 
13. Polioptila bilineata bilineata (Bonaparte) 3). 
Culicivora bilineata Bonaparte, Consp. Gen. Avium, Vol. 1, p. 316 (1850) (Cartagena, Colombia; types in Berlin 
Mus. examined). 
1) The type of C. boliviana in the Brit. Mus., exact locality unknown, and a single male from Santa Cruz (Central 
Bolivia) in Coll. H. v. Berlepsch differ from a large series of P. dumicola dumicola (Paraguay, Argentine, Western Bolivia 
|San José, Samaipata]) in having the upper throat and middle of the abdomen rather whitish, and the silvery-white malar 
stripe broader and more distinct. ‘wo males from Argentine, one from Buenos Aires, the other from Espartillar (south of 
Buenos Aires), however, also agree in these respects with the type of C. boliviana. A good series is required to settle the 
status of the Central Bolivian form. . 
2) Cfr. Hellmayr, Novit. Zool. Vol. 13, 1906, pp. 316, 317. 
3) Mr. Ridgway, in his admirable work : Birds of North and Middle America, Vol. 3, 1904, pp. 726-729, attempted to 
discriminate between P. bilineata (« from Veragua *) to Carribean Coast of Province of Santa Marta, Colombia ») and 
P. superciliaris (from the « Isthmus of Panama to Guatemala»). P. bilimeatais said to have the under parts pure white, with 
the flanks only washed with pale bluish grey, and to be larger (3 males from Santa Marta: wing 48-50, tail 42-44; 3 females 
from Santa Marta : wing 45,5-47, tail 42-43,5 mm.); P. superciliaris to have the chest and sides of the body strongly shaded 
with bluish grey and to be of smaller size (7 males : wing 45-47,5, tail 38-41; 10 females : wing 41,5-44, tail 36,5-39,5 mm.). 
Having once more gone into the question, I am — much to my regret — unable to concur with Mr. Ridgway’s view. Besides 
the types of C. bilimeata O 2 ad. from Cartagena, Berlin Museum, kindly forwarded by Dr. Reichenow, and two topotypical 
males of P. superciliayss from Lion Hill, Panama R. R., obtained by McLeannan and received from Mr. Geo. N. Lawrence, 
which have been obligingly lent me by Count Berlepsch and Mons. A. Ménégaux respectively, I have before me forty-two 
specimens. As to the supposed differences in size it will be seen from the table given below that they have no real existence, 
while the colour characters do not prove to be constant either. It is only just to mention that the types of C. bilineata Bonaparte 
fully bear out the characters assigned to this form by Mr. Ridgway, viz. under parts pure white, with the flanks only pale 
bluish grey and the chest very faintly shaded with the same etc., while the two topotypes of P. superciliavts have the whole 
breast and sides much darker and more strongly washed with bluish grey. The grey of the back is by no means darker than 
in the types of C. bilineata and many other specimens from Ecuador and Peru. The large majority of my examples from 
Costa Rica and Guatemala agree in coloration of the under parts with the two adult males from Lion Hill, but the grey of 
the back is either pale as in the latter, or darker more slaty. Nevertheless, I should have admitted the distinctness of the two 
*) Mr. Ridgway includes Veragua in the range of the southern P. bilineata, apparently on the strength of Salvin’s 
record and without having seen a specimen. One of Arce’s examples from Chitra, Veragua, an adult male, is in the Tring 
Museum. It presents all the characters of superciliavis, viz. chest and sides strongly washed with bluish grey etc., and, if 
two forms be distinguished, it should undoubtedly go with the Central American race. The range of P. bilineata would, 
consequently, become restricted to N. W. South America. 
