BIRDS OF NORTH AND MIDDLE AMERICA. 201 



Eastern Costa Rica (Puerto Lim6n). 



Urochroma costaricensis Cory, Field Mus. Nat. Hist., Pub. 167, Orn. Ser., vol. i, 

 no. 7, May 31, 1913, 283 (vicinity of Puerto Limon, Costa Rita; coll. Field 

 Mus. Nat. Hist.). 



Genus PYRILIA Bonaparte. 



Caica (not of Bonaparte, 1850) Gbay, List Gen. and Subgen. Birds, 1855, 88. 



(Type, Psittacus caica Latham.) 

 Pyrilia Bonapahte, Naumannia, 1856 (Consp. Psittacorum, genus 20). (Type, 



Psittacula pyrilia Bonaparte.) 

 Eucinetus Rbichenow, Journ. fur Orn., 29 Jahrg., Heft 4, Oct., 1881, 353. (Type, 



Psittacus histrio Bodd&er:t= Psittacus caica Latham.) 



Rather small, short-tailed Psittacidse (length about 180-200 mm.) 

 with bill rather compressed, the greatest width of maxilla at base little 

 if any greater than length of gonys, and less than two-thirds the length 

 of culmen; tenth (outermost) primary not much, if any, longer than 

 seventh; tail less than half as long as wing, graduated for much less 

 than half the length of culmen; lores scantily feathered, sometimes 

 with sparse bristles only, and coloration varied (usually with red on 

 . under wing-coverts or axillars, the tail tipped with bluish and with 

 inner webs of rectices, except terminals, yellow or red. 



Bill moderate to rather large, shorter than head, slightly deeper 

 than long; depth of maxilla at base slightly less than its width at same 

 point, slightly less than half the length of culmen, the latter as long as 

 outer front toe without claw (sometimes slightly longer), regularly and 

 strongly decurved from base, usually rounded though sometimes 

 flattened for basal half or more; maxillary unguis rather large, nar- 

 rowly conical or cuneate and obtusely pointed in vertical profile, its- 

 width at base of corrugated palatal surface decidedly less than its 

 length; depth of mandible at base much less than its width at same 

 point, slightly to decidedly less than length -of gonys, the mandible 

 broadly rounded (rarely with a median ridge) beneath, more or less 

 flattened laterally, the short, truncated, recurved tip deeply concave 

 above; maxillary tomium nearly straight to the very shallow post- 

 ungual excision, sometimes very slightly lobed (never "toothed") just 

 behind the latter; mandibular tomium concavely excised (never very 

 deeply) anteriorly, more or less convex posteriorly. Wing rather 

 large and pointed (the closed wings reaching nearly to tip of tail), the 

 longest primaries exceeding distal secondaries by nearly to quite two- 

 fifths the length of wing; eighth or ninth primary longest, the tenth 

 (outermost) usually shorter than eighth, rarely longer. Tail less than 

 half as long as wing, graduated for less than half the length of culmen, 

 the rectrices abruptly narrowed terminally, with tip subacuminate. 

 Tarsus about as long as outer hind toe without claw. 



Plumage and coloration. — Head normally feathered except chin, 

 orbital region and lores, the first more or less extensively naked, the 



