468 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



o. Tail slightly rounded. Bill small, much shorter than tarsus {measuring from nostril 

 to tip). Tail sharply tipped with 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-.60. Dark plumbeous 

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



Panama T. CAROL1NEN8I8. 



B. Yellow beneath, grayish or whitish anteriorly. 



a. End of outer primaries more or less attenuated {=■ Laphyctes and Saiell its, Reich- 

 eubach, and Alelittarchus, Cabanis, part). 



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



ginate. Wing, 5.00-5.50; tail, 4.00-4.50; bill, from uostril, .75-81, 

 breadth .53-. 60, 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. Hah. — Mexico. 



T. CRASSIROSTRIS. 



b\ Tail decidedly emarginate. Wing, 4.25-4.85; tail, 3.70-4.50; bill, from 

 nostril, .C0-.77, breadth .40-.52, depth .24-/35; tarsus, .G0-.80; middle 

 toe, .56-.G0. Head light ash-gray, lighter beneath, the throat sometimes 

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

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

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

 America, except West Indies T. ME LANCHOL1CUS. 



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



toe, .50. Similar to melaneholicus, bu1 cheeks and throat pure white, the 

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

 forest-region of Brazil T. alrigularis. 



8. Tail decidedly emarginate; wing, 4.00; tail, 3.G5 ; cnlmen, .05; tarsus, 



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

 indistinctly spotted with darker. Head cinereous, the feathers of the 

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

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

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



T. APOLITES. 



9. Tail f Wing, 4.10; tail, 3.10. Above cinereous, the back suffused 



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

 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. niveigulaeis. 



10. Tail even. W r ing, 4.75-5.25; tail, 3.65-4.00; bill, from nostril, .50-.55, 

 Avidth .35-.38, depth .25-.28; tarsus, .68-. 77; middle toe, .55-.5S. Head, 

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

 washed with light olive-green. Wings brownish dusky, indistinctly 

 edged with paler; upper tail-coverts and tail black, the outer pair of rec- 

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

 region, and crissum sulphur-yellow ; lining of wing 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, .55-.60, 

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

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

 lighter beneath. Wings light brownish-gray, with paler edgings. Upper 

 tail-coverts and tail black, the tip of the latter and the outer webs of tho 

 Lateral rectrices pale grayish, sometimes nearly white. Abdomen, anal 

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



