468 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



6. Tail slightly rounded. Bill small, much shorter than tarsus (measuring from nostril 

 to tip). Tail sharply tipped tvith white (_=^Tyrannus, as sometimes restricted). 



4. Wing, 4.45-4.75; tail, 3.40-3.75; bill, from nostril, .50-.57, depth .24-27, 



width .37-40; tarsus, .70-.78; middle toe, ..55-. GO. Dark plurabeoui- 

 above, the head and tail black. Hub. — Eastern North America; south to 



Panama T. carolinensis. 



B. Yellow beneath, grayish or whitish anteriorly. 



a. Und of outer primaries more or less attenuated {=^ Laphycd s and SateUux, Reicb- 

 enbach, and Melitta7xh us, Cabauis, part). 



5. Bill excessively stont, all its outlines convex. Tail even or faintly emar- 



ginate. Wing, 5.00-5.50; tail, 4.00-4.50; biU, from nostril, .75-.81, 

 breadth .53-. CO, depth .38-.43; tarsus, .72-78; middle toe, .63-.68.. 

 Above olivaceous-gray, the wings and tail browner, the head darker;, 

 crown-patch lemon-yellow ; malar region, chin, and throat white, the 

 jugulum faintly ashy ; rest of lower parts sulphur-yellow. Hal). — Mexico. 



T. CRASSmOSTRIS. 



6. Tail decidedly emarginate. Wing, 4.25-4. ^5; tail, 3.70-4.50; bill, from 



nostril, .(;0-.77, breadth .40-.52, depth .24-.35; tarsus, .60-.80; middle 

 toe, .56-.C0. Head light ash-gray, lighter beneath, the throat sometimes 

 quite white; back, etc., greenish gray; Avings and tail dusky, with 

 lighter edgings; lower parts, iucluiling breast, rich lemon- or gamboge- 

 yellow, the breast tinged with olive. Hah. — The whole of Tropical 

 America, except West Imlies T. melaxcholicus. 



7. Tail decidedly emarginate. Wing, 4.00; tail, 3.42; eulmen, .60; middle 



toe, .50. Similar to melanelioUcus, but cheeks and throat pure white, the 

 wing-edgings whitish green, instead of light cinerrous. Hah. — Northern 

 forest-region of Brazil T. albigularis. 



8. Tail decidedly emarginate; Aving, 4.00; tail, 3.65; cnlmeu, .65; tarsus. 



.60 ; middle toe, .50. Above brown, washed with olive-gray, the back 

 iudistinctlj^ spotted with darker. Head cinereous, the feathers of the 

 bright yellow crown-patch tipped with black. Wings and tail brown, 

 the remiges edged Avith whitish, the outer tail-feathers with rusty. 

 Throat cinereous ; breast and belly sulphur-yellow. Hah. °? 



T. ArOLlTES. 



9. Tail ? Wing, 4.10; tail, 3.10. Above cinereous, the back suifnsed 



with olive ; crown-patch yellow ; wings and tail black, edged with Avhit- 

 ish ; upper tail-coverts black, edged with olive. Beneath pale yellow, the 

 throat and fore-neck pure white, the breast washed with gray. Hah. — 

 Ecuador T. xiveigularis. 



10. Tail CA-en. Wing, 4.75-5.25; tail, 3.65-4.00; bill, from nostril, .50-.55, 

 width .35-.38, depth .25-28; tarsus, .68-.77; middle toe, .55-.58. Head, 

 breast, and back cinereous, paler beneath, the chin nearly white, the back 

 washed with light oliA'e-green. Wings brownish dusky, indistinctly 

 edged with paler; upper tail-coA^erts and tail black, the outer pair of rec- 

 trices with their outer webs white, in marked contrast. Abdomen, anal 

 region, and crissum sulphur-yellow ; lining of Aviug light grayish yellow. 

 Crown-patch deep orange-red. Hah. — Western United States and Western 

 Mexico T. verticalis. 



11. Tail even. Wing, 5.00-5.40; tail, 3.70-4.20; bill, from nostril, .5.-5-.60, 

 width .35-. 45, depth .27; tarsus, .72-.78; middle toe, .55-.60. Hea<l and 

 jugulum deep cinereous, the chin whitish ; back and breast olivaceous-gray, 

 lighter beneath. Wings light broAvnish-gray, with paler edgings. Tpper 

 tail-coAcrts and tail black, the tip of the latter and the outer Avel.s uf the 

 lateral rectrices pale grayish, sometimes ueai'ly Avhite. Abdomen, anal 

 region, and crissum sulphur-yellow ; lining of the wing sulphur-yellow. 



