NATURAL SCIENCES OF PHILADELPHIA. 235 



cept the primaries, conspicuously margined with dull white; throat 

 grayish-white ; lower part of neck in front and upper part of breast 

 light cinereous; breast, abdomen, under tail coverts, and under 

 wing coverts pale yellow ; inner margins of quills grayish-white; 

 entire bill black; tarsi and toes brownish-black. 



Length (skin), 5^ inches ; wing, 2§; tail, 2|; bill, ^\ ; tarsi, \}r. 



Habitat. Venezuela? Collected by Mr. C. Wood. 



Type in my collection. 



Remarks. — The nearest ally of this species seems to be E. tra- 

 illii^ but the plumage above is l)rowner, with scarcely a tinge of 

 olive-green ; the margins of the wing coverts and quills are whitei-, 

 besides, the gray front and supercilliary stripe do not exist in E. 

 traillii; in the new species the yellow of the abdomen is much 

 brighter, but the smaller jet black bill is the most striking cha- 

 racteristic difference. 



4. Myiarclius yucatanensis. 



Myiarclius mexicanus. Lawr. Ann. Lj'c. X. Y., vol. IX., p. 203. 



Soon after suggesting that this bird might be Tgrannula mexi- 

 cnna, Kaup, on account of its short wings, and contending for 

 the integrity of my 31. ciner'ascens (generally referred to mexi- 

 canus) on account of its longer wings, I found from an examina- 

 tion of many examples of cinerascens tliat the measurement of 

 the wings was not a reliable character in this genus. This caused 

 me to question the probability of the Yucatan bird being Kaup's 

 mexicanus, and I concluded the true status of that species could 

 only be determined by an inspection of the tj'pe. Consequently 

 I solicited the aid of Mr. Sclater, sending him my specimen of the 

 Yucatan bird, and about the same time Prof. Baird sent the 

 Smithsonian specimen, with the request that he would endeavor to 

 get a view of Dr. Kaup's type. He recently wrote Prof Baird 

 that on application to Dr. Kaup, he sent the t^'pe of his T. mexi- 

 cana for examination, which, to his surprise, proved to be 31. 

 cooperi., Baird. 



The species now described, therefore, required to be named. 



Its length is 1j inches ; wing, 3f ; tail, 3|; tarsi, |. 



It is allied to 31. cinerascens, mexicanus, and lawrencii, but is 

 smaller than the first two, and rather larger than the last ; the 

 bill is not so depressed as in laiorencii, the culmen being more 

 rounded. It differs from all the above-named species iu being 

 18T1.J 



