Toward the southern part of its range where _noveboracensis_ meets _M. f. olivacea_ there is a marked increase in yellowness of the underparts. This coloration of the underparts, since it is not so well marked in the northern part of the range of _noveboracensis_, might be regarded as showing intergradation with _olivacea_ and _primulina_, each of which has far more intensely colored underparts than does _noveboracensis_. Excepting this increase of yellow on the underparts, however, there are few if any characters of _noveboracensis_ which undergo marked change as approach to the range of _olivacea_ is made. Indeed, the characters of _noveboracensis_ remain constant to within a relatively short distance of the geographic range of _olivacea_. Notwithstanding the state of affairs described above, intergradation seems to take place. Three specimens referred to _noveboracensis_ but which at the same time are regarded as intergrades with _olivacea_ are as follows: No. 28.300, Charleston Museum, from five miles east of York, South Carolina, is an adult female with a badly crushed skull. In external measurements the specimen agrees with _noveboracensis_. The underparts, as regards color and width, are intermediate. The general proportions of the skull and tympanic bullae agree with those of _noveboracensis_ but the skull is larger than in any female of true _noveboracensis_ and approaches that of _olivacea_. The same can be said of a young female, no. 80, Ohio State Museum, from Roswell, Georgia.