NJiW NORTH AMERICAN BIRDS. !)1 



the British Museum, .... but in that of Darmstadt, whence I ob- 

 tained the loan of it in 1871. I cannot do this again, but I have 

 a specimen in my own collection which, on that occasion, I com- 

 pared with Kaup's type and found to be similai, except as regards 

 the abraded plumage of my specimen. This specimen certainly 

 agrees best with the smaller or eastern race, .... that is with AT. 

 cooperi of Baird, .... but is smaller in dimensions than Baird's 

 type, and, therefore, much smaller than the large western form of 



the same species What Tyrannula cooperi of Kaup was, 



it is now, as I believe, impossible to ascertain ; because, if the 

 specimen so described is in the British Museum, as Kaup affirms, it 

 is not marked, and is, consequently, unrecognizable." 



It will thus be seen that the large western race is unnamed, 

 which is my excuse for providing it with a name as above. 



5. Myiarchus lawrencei olivascens, new subspecies. 



SuBSPECiFic Characters. — Differing from true Al. lawrencei of 

 Eastern Mexico, in very much paler colors: Pileum light hair- 

 brown, instead of dark sooty brown ; back light grayish olive, in- 

 stead of dark brownish olive ; remiges and rectrices edged with 

 dull ochraceous-rufous, instead of rusty rufous. Wing, 2.90-3.25; 

 tail, 3.00--3.25 ; culmen,- .65-. 70; widtli of bill at base, .30-.35 ; 

 tarsus, .ye-. 75. Hab. Western Mexico, north to southern Ari- 

 zona ; in winter, western and southern Mexico, and Yucatan. 



Type, No. 57,655, $ ad., Sta. Efigenia, Tehuantepec, Dec. 25, 

 1868 ; F. Sumichrast. 



I have carefully examined the type of Musicapa lawrencii Giraud, 

 and find that it corresponds exactly with specimens from eastern 

 Mexico, which are, without exception, (so far as the National Mu- 

 seum series are concerned,) much darker colored than those from 

 western Mexico. 



In Hist. N. Am. B. (ii, p. 2>?)3)> -^■^- Iciwreticei olivascens was 

 erroneously considered to be the true M. lawrencei, the dark 

 eastern race (true M. lawrencei) being referred to M. nigricapilliis 

 Caban. The latter is similar, but still darker, having the piieum 

 nearly black, (whence the name). It reaches its extreme develop- 



