NO. 1153. RE VISION OF THE GEXUS TUR TOMANES—ORERHOLSER. 449 



biowuisli white, chin almost pure white, the throat and breast with 

 faint spots of gray; sides and flanks strongly tinged with brownish 

 gray; crissum washed with ochraceous and finely barred with blackish. 



The very short tail of Thryomanes hrevicaudus Avill serve readily to 

 distinguish this species from any of its congeners excepting insularis. 

 It has, furthermore, ran(;h shorter wings and a decidedly longer ciilinen 

 than charienturufi, as well as more narrowly marked lower tail-coverts. 

 Compared with leucophrys it is darker and appreciably browner on the 

 upper surface; the wings and tarsus are shorter; the bill of greater 

 length. It has a decidedly shorter wing, longer bill, somewhat shorter 

 tarsus, and rather less heavily barred crissum than nesophilus, from 

 which, in color above, it is not consincuously different. The characters 

 which sei)arate it from iusiilaris consist in shorter tarsus, somewhat 

 shorter tail, longer bill, more extensive superciliary stripe, barred 

 crissum, ochraceous wash below, and black tail broadly tipped with 

 whitish. One of the three adult specimens examined is very much 

 grayer throughout than the type, being also, from abrasion, somewhat 

 paler. 



The third specimen is intermediate in color between the type and the 

 one just mentioned. The single young bird is darker than the young 

 of leucoplirys, but can apparently not be distinguished from some 

 examples of charienturus. 



Four specimens examined, all from Guadalupe Island, Lower Cali- 

 fornia. 



The present investigation has been ba.sed primarily on the collection 

 of the U. S. National Museum, together with that of the liiological 

 Survey of the Department of Agriculture. The writer wishes here to 

 thank Mr. Kidgway for access to the former and Dr. C. Hart Merriam 

 for i)ermission to make use of the latter. He is also under obligation to 

 Mr. Josci)h Grinnell, of Pasadena, California, whose generous loan of 

 series of California birds has in large measure contributed to the 

 elucidation of the various western forms. 

 Proc. ]^. M. vol. xxi 29 



