_a._ Inner webs of primaries barred entirely across, with white and dusky; “mustache” across the cheeks conspicuous; no conspicuous superciliary stripe of white. 1. =T. sparverius.=[61] Crown bluish, with or without a patch of rufous. ♂. Wings and upper part of head slaty, or ashy-blue; scapulars, back, rump, and tail reddish-rufous; primaries, basal half of the secondaries, and a broad subterminal zone across the tail, black. ♀. The bluish, except that of the head, replaced by rufous, which is everywhere barred with blackish, and of a less reddish cast. _Hab._ Entire continent of America, also Lesser Antilles, north to St. Thomas. _b._ Inner webs of primaries white, merely serrated along the shaft with dusky; “mustache” obsolete or wanting; a conspicuous superciliary stripe of white. 2. =T. leucophrys.=[62] Similar to _sparverius_, except as characterized above. _Hab._ Cuba and Hayti. =B.= Back rufous only in the ♀. Lower parts deep ferruginous-rufous; front and auriculars dusky. 3. =T. sparveroides.=[63] ♂. Above, except the tail, entirely dark plumbeous, with a blackish nuchal collar; primaries and edges and subterminal portion of tail-feathers, black. Beneath deep rufous (like the back of _sparverius_ and _leucophrys_), with a wash of plumbeous across the jugulum; throat grayish-white. Inner webs of primaries slaty, with transverse cloudings of darker. ♀. Differing from that of the above species in dark rufous lower parts and dusky, mottled inner webs of primaries. Second and third quills longest; first shorter than or equal to fourth. _Hab._ Cuba (only?). The distinguishing characters of _F. sparverius_ having been given in the foregoing synopsis, I will here consider this species in regard to the modifications it experiences in the different regions of its geographical distribution.