438 Mr. P. L. Sclater on the Genus Grallaria. 



tions have been made since the puUication of my '' Synopsis 

 of the American Ant-birds" in 1858*. 



The genus Grallaria f — one of the best-marked forms 

 amongst the Formicariidae^ and offering many points of ex- 

 ternal resemblance to the Pittce of the Old-World tropics — 

 may be conveniently divided into four sections^ as follows : — 



a. Squamigerae, containing the two species G. squamigera 

 and G. gigantea, which are easily distinguishable from the 

 rest of their congeners by their large size and strong thick 

 bill. 



b. Reges, containing the seven representative forms of the 

 G. rex sive varia, some of which are well defined, while others 

 scarcely deserve specific separation. These I take geogra- 

 phically from north to south. 



c. Uniformes, those with the plumage generally of a uni- 

 form character, without flammulations upon the breast and 

 belly. This group consists exclusively of high-ranging Andean 

 species. 



d. Flammulatie, containing the remaining nine species, 

 all of which have the under surface more or less flammulated, 

 and lead us on to the group of diminutive species which I 

 have separated under the name GrallariculaX. 



The genus Grallaria therefore, as thus arranged, contains 

 twenty-seven species known to me. The diagnoses added under 

 each head are taken from examples in my own collection and 

 that of Messrs. Salvin and Godman, in which are to be found 



* " Synopsis of the Americau Ant-birds," pts. i., ii., iii., P. Z. S. 1858, 

 pp. 202, 232, 272. See also supplement, P. Z. S. 1868, p. 671. 



t The genus Grallaria was founded by Vieillot in 1816, on Buffon's 

 " J2oi des FourmilUers " (= G. varia). According to my views it is equi- 

 valent to, or should comprehend the following generic terms : — 



3Iyioturdus, Boie, Isis, 1820, p. 972, Type G. varia. 



Myiotrichas, Boie, Isis, 1831, p. r)42 = My ioturdus, 



Colohathris, Gloger, Hand. u. Ililfsb. d. Nat. p. 304 (1842). Type G. 

 varia. 



Codonistris, Gloger, Hand. u. Hilfsb. d. Nat. p. 303 (1842). Type G. 

 hrcvicatida. 



Iti/psibcmon, Cabanis, Wicgm. Archiv, 1847, pt. i., p. 217. Type G. 

 ruficapilla. 



t P. Z. S. 1858, p. 283. 



