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 Mar., 1910 STATUS OF THE CALIFORNIA BICOLORED BLACKBIRD 67 (nos. 1 and 2) are from Stanislaus County (interiof valley region) while no.. 3, quite heavily markt, comes from Marin County (central coast region) tho it is sup- posed to be A. g. californicts, and should have but little or no streaking. In fact it is a late spring bird with the feathers badly worn, and must have been much more heavily markt earlier in the season. The fourth bird from the left (no. 4) is from Stanislaus County also, and is nearly as heavily streakt as are the next two, one of which is from Riverside County, southern California (no. 5) and the other from South Carolina (no. 65. This streakt specimen from Stanislaus County is about an average of the females taken there and is indistinguishable from the majority of females from southern California, while the first specimen on the left, (no. 1)without streaking, is rather Fig. 22. SERIES OF FEMALES OF2AGELAIUX ARRANGED TO SHOW THE GRADATION OF STREAKING ON THE VENTRAL SURFACE rare among the' Stanislaus birds but is about the average in the San Francisco Bay region. (See Fig. 22.) In the photograph of the middle wing coverts of three males the idea was to show the coverts alone. I found this a difficult matter, as it was a delicate operation to part the feathers in such manner as to get the results without damaging speci- mens which were only loaned. But while the result is rather rough looking the idea itself seems to be carried out sufficiently for the purpose of demonstration. The bird on the left, (no. 1) supposedly A. guberator cahfornicus, showing only black middle wing coverts is from the San Francisco Bay (central coast) region, the center one (no. 2), showing the innermost coverts entirely black and the rest with a decided black tipping is an average bird from Stanislaus County (interior valley region) while the one on the right (no. 3)is from southern California,