1903.] NATURAL SCIENCES OF PHILADELPHIA. 29 



Dendroica auduboni (Towns.). 



One secured April IS, Laluz Canon. 

 Helminthophila virginiae (Baird). 



One shot in Dry Cafion, April 29. 

 Wilsonia pusilla pileolata (Pall.). 



Two obtained in Dry Canon, April 24 and 29. 

 Mimus polyglottos leucopterus (Vig.). 



"Abundant about the mouth of the canon, May 8-21." 

 Toxostoma crissalis Henry. 



"Very retiring in habits and always frequenting the mouth of the 

 caiion, April 7 to May 16." 



Heleodytes brunneicapillus couesi Mearns. 



" Noticed in the foothills in small flocks, April 9." 



The specimen secured seems to be unquestionably this form, although 

 two from Pecos in the Academy's collection approach anthonyi some- 

 what in the broadening of the marks on the back. 

 Salpinctes obsoletus (Say). 



"Noticed continuously, April 7 to May 21, in the canons only." 



Tbryomanes bewickii leucogaster (Baird). 

 Two secured in Dry Canon, April 25 and May 6. 



Catherpes mexicanus conspersus Ridgw. 



"Found in the deeper parts of the canon, where the junipers begin 

 and the greasewood stops, April 8 to May 17." 



The wear on the plumage of the back of these birds causes a striking 

 difference in their appearance. First the white borders to the spots are 

 lost and then the spots themselves, leaving the back almost uniform 

 and very different in appearance from the perfect postnuptial plumage. 



Auriparus fiaviceps (Sundcv.). 



"Noticed several times in the cailon, April 18 and Mav 9." A nest 

 and set of eggs were secured. 



Polioptila caerulea obscura Ridgw. 



"Found almost entirely in the canon, April 24 to May 13." 



REPTILE3S. 



Sixteen species of reptiles were obtained, many of them represented 

 by good series of specimens. These are about equally divided between 

 forms which range over the central Lower Sonoran area of Texas and 

 those which are characteristic of the desert region of Arizona to the 



