PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 15 



6. PERISOEEUS CANADENSIS NIGEICAPILLUS. 



Ch. — Similar to P. canadensis fumifrons in darkuessof coloration, but 

 forehead, lores, chin, throat, and sides of neck distinctly white, in marked 

 and abrupt contrast with the dark color of adjacent parts ; crown, occi- 

 put, and upper part of auricular region decidedly black, with little or no 

 admixture of slaty anteriorly. Differing from true canadensis in much 

 darker coloration throughout, much blacker crown, black auriculars, 

 less extensive white area on forehead, and more marked contrast of the 

 white portions of head and neck, with adjacent darker colors. 



$ adult : (No. 85950, U. S. Nat. Mus. Labrador, Apr. 2, 1880; " Schnei- 

 der"; presented by Dr. L. Stejneger.) Whole forehead (back to about 

 .75 of an inch from the anterior points of the nasal tufts), lores, malar 

 region, chin, throat, and sides of neck soiled white, many of the feathers 

 of the chin and throat having black shafts; crown and occiput, with 

 upi)er and posterior j^ortions of auricular region, deep black, somewhat 

 mixed with slaty anteriorly and posteriorly. Upper parts dark dull slate, 

 lighter and more grayish on the nape, and changing to plumbeous on 

 the secondaries and tail-feathers, all of which are narrowly bordered at 

 .ends with white, which is about .25 of an inch wide on lateral rectrices; 

 X^rimaries edged with grayish white beyond their sinuations. Lower 

 parts dark bi'ownish gray, quite abrupth^ defined against the soiled 

 white of the jugulum. Bill and leet deep black. Wing, 5.40; the pri- 

 maries 1.10 longer than secondaries; tail, 5.30, its gradation only .75; 

 culmen, .85 ; tarsus, 1.40 ; middle toe, .05. 



It is only after very careful comparison with numerous specimens of 

 the true P. canadensis from Maine, Nova Scotia, New Brunswick, Min- 

 nesota, and various localities in the interior of British America, and of 

 an even larger series of P. canadensis fumifrons from Alaska, that I have 

 concluded to base a new geographical race of this species upon the 

 single specimen described above. That I am fully justified in doing 

 so is evident from the fact that not one specimen among nearly 100 adult 

 birds of this genus resembles very closely the specimen in question. In 

 all probability the form to which the present specimen belongs inhabits 

 the coast -district of Labrador, and would thus represent on the- Atlantic 

 side the littoral race of Alaska, called P. canadensis fumifrons. 



SYIVOPSIS OF THE WKST IIVUBAIV MYAWESTES. 

 By I.E01VHARD STEJIVEGER. 



Having had occasion to examine the various species of Myadestes* in 

 connection with a study of the genera of Turdidie, certain differences in 

 the wing-structure among species of the West Indian group, typified by 



* So tlie name is origiuallj' spelt by Swaixson, and as /.ivain found besides /nultx, I 

 have preferred the older form to Agassiz's restoration. 



