THAYER, BANGS : AVES FROM SAVANNA OF PANAMA. 215 



10. Diplopterus naevius (Linne). 

 Five adults, both sexes. May 19 to 25. 



11. Crotophaga ani Linne. 

 One 9 , May 2. 



PSITTACIDAB. 

 12. Brotogerys jugularis Mulleb. 



Twenty- three, adults of both sexes, May 12 to 26. 



MOMOTIDAE. 

 13- Momotus conexus, sp. nov. 



Six adults, both sexes, May 6 to 26. 



Type. — Coll. E. A. and 0. Bangs, No. 14,054, adult 9 , Savanna of Panama, 

 Panama, May 6, 1904. 



Characters. — A very distinct form at once distinguished from M. lessoni 

 Less, of Central America by its much smaller size and smaller bill, as well as 

 different coloration, — the throat in M. lessoni being always green to base of 

 bill, without a hazel chin-spot. From M. subrufescens Scl. of northern South 

 America, the Panama bird differs in darker general coloration ; the back is 

 uniform dark green, becoming chestnut only on nape just below the blue 

 of back of crown (in M. subrufescens the neck and mantle are pale tawny more 

 or less suffused with light green) ; under parts much darker, — hazel or chest- 

 nut (tawny ochraceous-rufous in M. subrufescens), the throat and upper brea.st 

 strongly suffused with dark green ; a conspicuous hazel chin-spot. 



Remarks. — The Panama bird has always been referred to M. subrufescens 

 Scl. Type locality Santa Marta, Colombia, but is so different from that form in 

 color that it must certainly be regarded as at least a subspecies, — but if a sul> 

 species, then of what ? All of the many recognized forms of blue-headed 

 motmots, from eastern Mexico south to Amazoiua and Bolivia, are so much 

 alike, it would not be at all surprising to find that in reality they are all but 

 representative geographical laces — subspecies — of one wide-ranging variable 

 species. 



