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 128 THE CONDOR ] Vol. II variable. Five out of twenty specimens of stelleri in my collection from Sitka are boldly barred with black; in six skins the barring is of a medium intensity, while in nine the barrings are quite indistinct. In the Sierra and Southern California specimens, six have boldly barred wings and tail; in five the markings are of medium extent; and in four they are indistinct. There appears to be an average sexual difference in this respect, more males being heavily barred than females. Out of 58 skins at hand, including stelleri, carbonacea and frontalis, 32 are males and 26 are females. Of the males 18, or 56 per cent. are heavily barred; 8, or 25 per cent. medium, and 6, or x 9 per cent. indistinct. Of the 26 females, 11, or 4 2 per cent. are heavily barred; 6, or 23 per cent. are medium, and 9, or 35 per cent. are indistinct. There is also an average disparity in the dimensions of the females, especially as to the length of tail and crest. The accompanying table of measurements also shows the geographical variation in size of these jays. The measurements.increase toward the north along with the darkening of the colors, while the length of the crest and amount of the blue on its front, conversely, increase toward the south. Depth of Wing Tail [Tarsus [ Crest I Culmem Bill C. stelleri (Sitka, Alaska). Average of 12 c c 5.88 5.84 1.81 2.45 1.20 -45 .... 89 9 5.71 5.62 1.73 2.37 1.14 -43 C. s. carbonacea (Oregon and Coast of California). Average of 8c c 5.81 5.82 1.78 2.58 1.16 -45 .... lO9 9 5.43 5.40 1.72 2.49 i. Ii .42 C. s. frontalis (Sierras of Central and Southern California). Average of 9c c 5.65 5.5 1.65 2.67 1.16 .39 .... 69 9 5.4 5.26 1.64 2.46 I.II .37 . BLACK-HEADED GROSBEAK. amelotlia melanoeephala mierorhyneha new subspecies. Xubs. Char.--In both sexes, as compared with Z. melanocephala from southern Arizona, bill much smaller and differently proportioned: wings and tail somewhat shorter; c with fore parts, rump, sides and crissum darker brown, almost the tawny or Ridgway's Nomenclature of Colors; white tipping ot' median wing coverts broader. Type-- ad., No. 2987 Coll. J. G.; Buckhorn Canyon, Sierra San Gabriel, Los Angeles County, California; July, 18, 1897; collected by Joseph Grinnell. Habital--Pacific Coast region of the United States, including California, Oregon aud Washington.