298 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Calocitta bullockil (not Pica hullocki Wagler) Sclatek, Proc. Zool. Soc. Lond., 



1858, 358 (Comayagua, Honduras). 

 [^Cyanwms] buUocUi Gray, Hand-list, ii, 1870, 6, no. 6125 (Guatemala). 

 Cyanw-us guberaatrix (not Garrula gubemairix Temminck) Taylor, Ibis, 1860, 113 



(Tigre I., Pacific side Honduras; habits). 

 Oilocitta formosa azurea Nelson, Auk, xiv, Jan. 1897, 55 (Huehuetan, Chiapas, 



s. e. Mexico; coll. U. S. Nat. Mus.). 



Genus PSILORHINUS Ruppell. 



Psilorhinus Rtjppell, Mus. Senckenburg, 1837, 188. (Type, P. mexicanus 

 Ruppell. ) 



Large, plainly colored Garrulinge, with the nostrils whollj^ exposed. 



Bill stout, compressed (much higher than broad at nostrils); culmen 

 curved throughout, shorter than tarsus. Frontal feathers bristly, erect 

 posteriorly, semi-antrorse anteriorly, forming a slight crest over base 

 of the maxilla. Nostril rounded, beveled off anteriorly to the sur- 

 face of the maxilla. Wings and tail about equal in length, the latter 

 averaging a little the longer; seventh to fourth primaries nearly equal 

 and longest, the tenth much longer than the tarsus, the longer with tips 

 rather narrow and straight; longest primaries exceeding secondaries 

 by more than length of middle toe, or of bill from nostril. Tail 

 graduated for more than length of tarsus, the rectrices rather broad. 

 Tarsus about twice as long as length of bill from nostril, the planta- 

 tarsi entire, except at extreme lower portion; middle toe, with claw, 

 much shorter than tarsus. 



Coloration. — Head, neck, and chest plain deep sooty brown, darker 

 on pileum and sides of head; upper parts plain sooty brown, graj^er 

 (sometimes somewhat glaucous) on remiges and rectrices, the latter 

 sometimes tipped with white; under parts of bodj^ varying from white 

 to sooty gray or brown. 



Nidification. — (Unknown. ) 



Range. — Eastern Mexico to Costa Rica. (Two species.) 



KEY TO THE SPECIES AND SUBSPECIES OF PSILORHINUS. 



a. Rectrices without white tips. {Psilorhinus morio.) 



b. Under parts of body very pale brownish gray or grayish brown, passing into 

 white posteriorly. (Northeastern and arid portions of east-central Mexico.) 



Psilorhinus morlo morio (p. 299) 



hb. Under parts of body deep brownish gray or grayish brown. ( Southern and 



humid portions of east-central Mexico. ) . .Psilorhimis morio fuliginosus (p. 300) 



aa. Rectrices (except middle pair) broadly tipped with white. [Psilorhinus mexi- 



canus. ) 



b. Larger (wing and tail averaging more than 203, tarsus averaging 52); white tips 



to rectrices narrower (averaging 29) . (Southeastern Mexico.) 



Psilorhinus mexicanus mexicanus (p. 301) 

 bb. Smaller (wing and tail averaging decidedly less than 203, tarsus averaging 

 decidedly less than 51); white tips of rectrices broader (averaging more 

 than 30.5). 



