142 



Mearns, Cactus Wrois. of the United States. 



TAuk 

 LApr. 



agrees exactly with a specimen from Guaymas, Sonora (No. 89908, 

 U. S. Nat. Mus., Dec. 11, 1882, L. Belding), and in the coloration 

 of the under parts in general it is practically identical with four 

 specimens from the same locality, though three of these being ob- 

 tained late in March and therefore in worn plumage have the 

 ochraceous-buff color somewhat paler. The coloration of the up- 

 per parts is not materially different from that of another Guaymas 

 specimen (No. 90081, March 26), and far more like it than any 

 two of the Guaymas specimens resemble one another. On the 

 whole, I have very little doubt that Lafresnaye's type came from 

 some part of northwestern Mexico, perhaps from Guaymas. 



'' Measurements of the type and the four Guaymas specimens 

 are as follows : — 



" Measurements. 



It appears from the foregoing that Lafresnaye's h-nJiiieicapillHS 

 is a Mexican form, which, subspecifically restricted, does not enter 

 the United States. The forms pertaining to the region covered 

 by the A. O. U. Check-List should stand as follows : — 



Heleodytes brunneicapillus affinis {Xantus). 

 St. Lucas Cactus Wren. 



Campylorhynchus affinis Xantus, Proc. Acad. Nat. Sci. Phila., 1859 

 p. 298. 



Heleodytes brunneicapillus affinis Anthony, Auk, Vol. XII, No. 3, July, 

 1895, p. 280. 



Geographical distribution. — -Southern Lower California. 



i"The tip of the maxilla is broken off in Lafresnaye's type; consequently I 

 have substituted for length of culmen in all the specimens the length of the 

 mandible measured from tip to malar apex." 



