190 



Bangs Descriptions of New American Birds. 



Remarks. This new form of the vermilion tyrant-bird occupies Yuca- 

 tan, British Honduras and parts of Guatemala. The specimens which I 

 have examined are conspicuously different from the more northern race. 

 Its characters were fully pointed out by Ridgway in Birds of North and 

 Middle America, but it was not given a name by that distinguished orni- 

 thologist. 



Leistes superciliaris petilus subsp. nov. 



Type from Concepcion del Uruguay, adult 6"', no. 31,023, Mus. Comp. 

 Zool. Collected November 27, 1880, by W. B. Barrows. 



Characters. Similar to true L. superciliaris Bp. of Brazil in color, but 

 decidedly smaller, with a shorter bill, wing in adult cT about 98 (in adult 

 c? of L. superciliaris superciliaris about 105) ; culmen in adult cJ 1 about 

 19.5 (in adult cT of L. superciliaris superciliaris about 22.5). 



Measurements. 



Tarsus, Culmeu. 



31 

 30 



29.5 



30 



30.5 



19.5 



19 



19 



20 



19 



Remarks. I would also suggest the necessity of subdividing Leistes 

 militaris (Linn.) and recognizing Leistes militaris militaris (Linn.), 

 Guiana and eastern Peru north to Panama, smaller, with a shorter bill, 

 wing in adult <? about 93, culmen about 20, and Leistes militaris eryth- 

 rothorax Pelzeln, Lower Amazon Valley, larger, with a longer bill, wing 

 in adult c? about 100, culmen about 22.5. 



