OPOEOENIS. 149 



Dota Mountains (Carmiol^); Panama, Chiriqui, Santa Fe (ArcS^% Lion Hill 

 (M'Leannan ^ ^), Chepo (Arce).—CvBA ^^ 



This species appears to be of rare occurrence in Mexico, as only two instances are 

 recorded of its having been observed in that country ^ 7. j^ Guatemala, however, 

 during the winter months it is far from uncommon, and is generally distributed from 

 an elevation of 1200 feet up to 7000 feet above the sea, frequenting both the forests 

 of the lowlands and the second-growth woods of higher altitudes. Southwards of 

 Guatemala it probably occurs everywhere in winter as far as Chepo in the isthmus of 

 Panama, though our records only establish its presence in Costa Eica, the adjoining 

 part of Veragua, and a little beyond the line of the Panama raUway. In Cuba it is, 

 accordmg to Dr. Gundlach, a very rare bird ^^. Hence we may conclude that the line 

 of the migration of this species from the Eastern States to Central America is rather 

 a narrow one, extending from the State of Vera Cruz to the eastern coast of 

 Yucatan. 



In its summer range Oporornis formosa occupies the eastern portion of the United 

 States, and goes as far north as Washington and Chicago, and westwards to the Kansas 

 river ^^. In Texas, where Mr. Dresser observed it near San Antonio ^, it is migratory, 

 passing through the country in spring and autumn. 



Tlie nest is described by Brewer ^^ as a clumsily-made structure, placed on the 

 ground, consisting outwardly of dead leaves, and lined inwardly with fine roots. 



The eggs are white, sprinkled all over with fine dots of red and reddish brown, espe- 

 cially at the larger end. 



The song of this species is described by Mr. Eidgway as a very pretty fine whistle, 

 resembling that of Cardinalis virginianus, but finer in tone, though not so powerful. 



To Dr. Cones we are indebted for a full list of the references to the literature of 

 this bird ". 



GEOTHLYPIS. 



Geothlypis, Cabanis, Arch. f. Naturg. i. pp. 316, 349 (1847) ; Baird, Brew. & Ridgw. N. Am. B. i. 



p. 395. 

 Trichas, Swainson, Zool. Joum. iii. p. 167 (nec*€rloger} . 



Twelve species and races are now recognized of this genus, whereof eight oc(iur 

 within the limits of the Central- American fauna. Of these, three spend the winter in 

 the country as migrants from the north, three are peculiar to Mexico, one is found 

 in Guatemala and Costa Eica, and one is peculiar to the district of Chiriqui. Of the 

 extra-limital species, G. rostrata is peculiar to the Bahamas ; G. semiflava, G. cequi- 

 noctialis, and G. velata are found respectively in Ecuador, inGuiana and Amazonia, 

 and in Brazil, 



All the members of the genus have very short rounded wings. The rictal bristles 



