. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 3. Plumage patterns and bill shapes of species comprising the Todirostrum capitate lineage. Both capitate and Taeniotriccus andrei are sexually dimorphic. Crowns of all but male capitate are rich rufous (heavy dots). Yellow on the breast (light dots) is most pronounced in Poecilotriccus ruficeps, but present in all forms. The hidden white stripe in the wing of capitate males (left) further reflects the probable af- finities of this species with andrei (right). The bill of ruficeps (bottom) approaches the typica
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 3. Plumage patterns and bill shapes of species comprising the Todirostrum capitate lineage. Both capitate and Taeniotriccus andrei are sexually dimorphic. Crowns of all but male capitate are rich rufous (heavy dots). Yellow on the breast (light dots) is most pronounced in Poecilotriccus ruficeps, but present in all forms. The hidden white stripe in the wing of capitate males (left) further reflects the probable af- finities of this species with andrei (right). The bill of ruficeps (bottom) approaches the typical Todirostrum shape most closely, while the much heavier bills of capitate (middle) and andrei (top) have diverged con- siderably from those of all other Euscarthmine species. This may be associated with their long isolation as relict species within their rapidly diversifying tyrannid lineage. The throat of andrei is light tawny, fading through light grey into a wash of yellow on the belly, but broken by a broad, black pectoral band. This pattern is precisely repeated in ruficeps, though the breast band is rather faint and the yellow below quite rich. Furthermore, nominate capitate shows a broken black breast band, and the relict form to the south even retains a complete one (Figure in Berla, 1946). 4) The striking yellow wing stripe in andrei appears at the outset to be unique, but even this character is present, if reduced, in capitate; the outer webbings of capitale specimens' innermost remiges are broadly edged with yellow. When the full wing. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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