482 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



any other of the species of this genus with which I have been able 

 to compare it, Tyrannus luggeri is, nevertheless, so very distinct as not 

 to need any special comparison. In size and general form it corresponds 

 almost exactly with T. caroUnensis, while the biU is much more like 

 that of the latter si^ecies in size and shape than that of any of the 

 yellow-bellied group. The totally different coloration, however, allies it 

 more closely to the group represented by T. melcmchoUcuSj while the 

 broad-tipped primaries constitute a feature entirely unique in this genus. 

 Although it seems rather strange that a new species of this genus 

 should be found in a district so well explored ornithologically as the 

 habitat of the present bird, I have nevertheless been unable to find a 

 description at all applicable to it. 



13.— TYRANNUS AURANTIO-ATROCRISTATUS. 



Tijranmts ■mi7'aniio-airocristatus, IjAFXi. & D'Orb., Mag. tie Zool. 18i7, 45 (Bolivia). — 

 D'OuB., Voy. Ois. 1839,312 (Corrieutes, Paraguay; Vallo Graude, Bolivia). — 

 BuuM., Reise La Plata, II, 1861, 453.— Scl. «fe Salv.,P. Z. S. 186G, 190 (Ucay- 

 ali, E. Peru); Norn. Ncotr.,1873, 53.— Hudson, P. Z. S. 1870, 113 (Biienos 

 Ayres, rare ; Entre Rios). 



Tyrannus ynca, Licht., Nomencl. 1854, 16 (Brazil; Guiana). 



Tyrannus hica, Scl., P. Z. S. Nov. 26, 1861, 383 (Bolivia ; Mus. P. L. S. et Berol. ; 

 ex " Licht. iu Mus. Berol.") ; Catal. 1861, 237, No. 1453 (Bolivia).— Pelz., Orn. 

 Bras. 1871, 118 (Goiaz, Rio Vermellio, Serrado, aud Cuyaba). 



f Tyrannus aurijknnma, BuRJi., J. f. O. July, 1800, 240 (Moudoza). 



Sp. Cil— Wing, 3.50-4.00; tail, 3.10-3.30; bill, from nostril, .40, 

 width at base .30, depth .20 ; tarsus, .GO ; middle toe, .42. Tail even, or 

 (apparently) very slightly emarginated. Extreme end of outer i^rimary 

 iittenuated.* Above dull smoky slate, the wings and tail witli narrow 

 paler edgings. Below mouse-gray, becoming paler and (in young at 

 least) somewhat tinged with pale sulphur-yellow posteriorly. Bill and 

 feet blackish. Adult: Entire pileum black, with a central concealed 

 patch of clear lemon-yellow. Young: Pileum smoky brownish slate, 

 like the back. 



Hab. — Bolivia (Lafr. & D'Orb.); Paraguay (D'Orb.); Buenos Ayres 

 (Hudson); Brazil (Pelzelu); Pebas, Peru (Mus. Vassar College). 



Eemarks. — This very strongly marked species is so very different 

 from the other Tyranni iu both coloration and the details of external 

 form as to suggest strong doubts of its behig properly referable to 

 this genus at all. It surely presents a very great contrast to T. may- 

 oiirostris. There are, however, such variations of form among the spe- 



*Dr. Sclater, iu liis description of Tyrannus inca (1. c), says that "the external pri- 

 maries are acuniiuated towards the points, the first three being also deeply emarginated 

 0.4 inch from their extremities." This is very different from the shape of the quills in 

 the single specimen I have been able to examine (an immature female, belonging to the 

 Museum of Vassar College), in which all the quills except the first are very broad at 

 the ends, the first only being emarginated and attenuated at the tip. This discrepancy 

 may, however, be owing to diffei'eucc of sex or age. 



