NEW BIRDS FKOM COZUMEL ISLAND. 23 



10. Attila cozumelce, sp. nov. 

 Specific Characters. — Most like A. citreopygia (Bonap.), but 

 lower parts grayish white, the throat and jugulum very indistinctly 

 streaked with darker. Type, No. 102,767, U. S. Nat. Mus.; Cozu- 

 mel, Jan. 29. 



11. Lampornis thalassinus, sp. nov. 



Specific Characters. — Most like L. prevosti (Less.), but upper 

 parts less bronzy or more of a grass-green, the black on the throat 

 much more extended, and the breast greenish-blue. Type, No. 

 102,796, $ , U. S. Nat. Mus.; Cozumel, Jan. 24. 



12. Chlorostilbon forficatus, sp. nov. 

 Specific Characters. — Most like C. caniveti (Less.), but tail 

 much longer (1.90 inches, forked for 1.15). Type, No. 102,812, 

 $ , U. S. Nat. Mus.; Cozumel, Jan. 23. 



13. Empidonax gracilis, sp. nov. 



Specific Characters. — Above ash-gray, more brownish, but 

 still decidedly gray, on lower back, rump, and upper tail-coverts ; 

 a distinct orbital ring, two broad wing-bands, and broad edges to 

 tertials, grayish-white ; sides of head, light ash-gray, fading to 

 grayish-white on throat ; jugulum and sides of breast, light brownish- 

 gray ; rest of lower parts, white. Wing, 2.50; tail, 2.20; culmen, 

 .55 ; bill, from nostril, .25 ; width of bill at base, .23 ; tarsus, .60 ; 

 middle toe, .30. Type, No. 102,737, 0. (?), U. S. Nat. Mus ; Coz- 

 umel, Jan. 22. 



14. Myiarchus platyrhynchus, sp. nov. 



Specific Characters. — Above dull brown, without olive tinge, 

 darker on pileum ; upper tail-coverts and edges of rec.trices, rem- 

 iges, and greater wing-coverts, rusty. Chin, throat, and jugulum, 

 pale ash-gray ; rest of lower parts, very pale sulphur yellow. Wing, 

 3.00 ; tail, 2.00 ; culmen, .85 ; bill, from nostril, .50 ; width at 

 base, .33; tarsus, .80; middle toe, .42. Type, No. 102,738, 9 (?), 

 U. S. Nat. Mus.; Cozumel, Jan. 22. 



