33. TEOGLODTTES. 251 



ences in the proportions of the primaries appear to be so constant as 

 to demand a separation into races ; and at present I regard them as 

 four subspecies, distinguished by the characters pointed out by Pro- 

 fessor iJaird. Tiie size and proportions of the quills play so important; 

 a part in the classification of some of the Old-World Warblers, that 

 the}' should not be neglected in a study of the Xcw-World Wrens. 

 In T. domesticus the first primary is more than half the length of the 

 second, and is generally half the length of the longest 4 uills, -whereas 

 in T. p(i)-l-manni it is half the second. However, on the -whole, 

 the diii'erences are by no means so marked in these Wrens as in 

 some of the -western and eastern races of Northern American birds. 

 Mr. Salvin states also that the proportions of the first and second 

 primaries are not constant, but so far I have found them to be so. 



The Western House-Wren inhabits the Western and Middle 

 "United States, and ranges from Western Canada south-wards to 

 California. 



a. Ad. sk. Ann Arbor, Michigan. Prof. J. B. Steere [P.]. 



b. 5 ad. sk. Fort Dufferin, Manitoba X. A. BoundarvComm. 



(G. Dcncson). [P.! 



c. Ad. sk. 49th Parallel, June 24, N. A. Bonndarj-Comm. 



1874 (G. Dawson). [P.]. 



d. e. (S ad. sk. Vancouver Island, May. A. Forrer [C.]. 

 /. S pull- sk. VaucoTiver Island, Jane A. Forrer [C.J. 



2(!. 

 9,h. ^,i. 2 a.^-sk. AVpst side of Eocky J. K. Lord, Esq. [P.]. 



Moim tains. 

 li, I, m. Ad. sk. California. Purchased. 



Subsp. /3. Troglodjrtes aztecus. 



TrDglodytes aedon, var. nztecus, Baiid, Bevicw Ainei: B. p. 139. 

 Troglodytes aedon, Salcin ^- Godman, Biol. Centr.-Amer., Aves, i. 

 p. 98. 



Similar to T. domesticus but very much paler. It has, however, 

 the same shaped Aving, the first primary being more than half the 

 second. Total length 5 inches, culmen 0-55, -wing 2, tail 1-8, 

 tarsus 0"7. 



The Mexican House-Wren seems to be confined to the eastern part 

 of Mexico. 



a. Ad. sk. Mexico. John Gould, Esq. 



b. Ad, sk. Mexico (J. Gotdd). Eyton Collection. 



Subsp. y. Troglodytes insularis. 



Troglodytes insularis, Later. Ann. Lijc X. York, x. p. 3 (e.v Baird, 

 MS.); id. Mem. Bost. Soc. Xnt. 'jli.it. ii. p. L>(i8 ; Grai/son, Pr. 

 Bout. Sur. Nat. JIi.st. xiv. p. 299 ; Sahin <»(• Godm. Biol. Centr.- 

 Amer., Aves, i. p. 99. 



General colour above greyish mouse-bro-wn, the back slightly 

 •waved -with dusky : -wings and tail banded across -with dusky black ; 

 underneath whitish, the vent slightly marked with dusky ; eye- 



