( 255 ) 



The first author to use the adjective pavoninus in combination with 

 Pteroglossus was apparently Wagler ; * but his excellent description taken from 

 a single bird from Valle Real, Mexico, in the Berlin Museum leaves no doubt 

 as to its being referable to Aulacorhynchus prasinus auct. In fact, Gould, four 

 years later, founded his Pteroglossus prasinus (Lichtenstein MS.) f on the very 

 same specimen in the Berlin Collection ! 



However, in spite of its undoubted priority, pavoninus (1829) cannot replace 

 prasinus (1833), for Wagler evidently had no intention of creating a new name 

 of his own, but merely employed Gmelin's old term, t 



Ramphastos pavoninus Gmelin is described as " R. viridis, pennis rubris et 

 pavoninis hinc inde inter spersis," and refers, no doubt, to some artefact. 

 Consequently, this name should be altogether disregarded. The nomenclature 

 of the two green Mexican Toucans stands, therefore, as follows : 



(a) Aulacorhynchus prasinus prasinus (Gould). 



Pteroglossus pavoninus (nee Gmelin) Wagler, fsis, 1829, p. 507 (Mexico, Valle Real : specimen 



in Museo Berolin. decembri occisum). 

 Pteroglossus prasinus (ex Lichtenstein MS.) Gould, Monogr. Ramph. (1st edit.), part i, plate 



(1833. spec, unicum in Mus. Berolin.). 



(#) Aulacorhynchus prasinus luagleri (Sturm). 



Pteroglossus pavoninus (nee Wagler) Gould, Monogr. Ramph. (1st edit.), part iii, plate (1835. 

 specimen in Mus. Monacense) ; idem, P.Z.S. 1835, p. 158 (Mus. Munich). 



Pteroglossus wagleri Sturm, Monogr. Rhamph. Heft 2, tab. [6] (1841. Mexico : Mus Monac.). 



Aulacorhamphm wagleri Sclater, P.Z.S. 1859. p. 388 (Xacatepec, Oaxaca, S.W. Mexico) ; idem, 

 Cat. B. Brit. Mus. xix. 1891. p. 157. 



Aulacorhamphus pavoninus (errore) Salvin & Godman, Ibis, 1889, p. 240 (Amula, Sierra Madre 

 del Sul, Guerrero, Western Mexico). 



This western form differs from A. p. prasinus in its dull yellowish frontal 

 band and oily-green crown ; by lacking the narrow, pale bluish green superciliary 

 streak ; and by having the black patch at the base of the culmen confluent with 

 the black stripe along the maxillary tomium. Besides the type, the Zoological 

 Museum at Munich possesses a second adnlt specimen, both without any further 

 indication than " Mexico." The wing measures 128-129, the tail 125-127, the 

 bill 75 77 mm. 



A. p. wagleri appears to be very rare in collections. The late A. Boucard 

 obtained an example at Xacatepec in Oaxaca, Mrs. H. H. Smith another in the 

 Sierra Madre del Sal, state of Guerrero. Additional specimens doubtless exist 

 in American museums. 



The following species are discussed in Part II. of this paper : 



T. coraya and its races ............ p. 227 



T, ridgwayi Berl. "\ 



T, coraya berlepschi Brab. & Chubb 



T. oyapocensis ituribisciensis Brab. & H Thr l/ othorlls y" griseigul* (Lawr.) . p. 229 

 Chubb 



* Ms, 1829, p. 507. 



f Monogr. Ramph. (1st ed.), Part i. 1833. 

 \ See Wagler's remark: " Ramphastos pavoninus auct or." 



Syst. Nat. 1, i. p. 353 (1788. ex " Le Toucan verd du Mexique," Brisson, Urn. iv. p. 423: ex 

 " Xochitenacatl," Fernandez, Hist. nov. Hisj). p. 51, tab. clxxxvii.). 



