CHERKIIi : ORNITHOLOGY OF THE ORINOCO REGION. 25I 



i. Above dull olive with head more or less rufescent. . . Pachyrhamphus tnarginatus. 



i'. Head uniform with back (not rufescent) Pachyrhamphus polychropteriis 



niger. 

 f. Rectrices not broadly tipped with white, buff or rufous, 

 g. Pileum black, blackish or grey, sharply contrasting 

 with general color of the upper parts. 

 h. Above grey, with or without slight olive wash (male) Pachyrhamphus cinereus. 



h'. Above tawny olive Pachyrhamphus marcidus. 



g'. Pileum cinnamon rufous nearly uniform with back (female).. Pachyrhamphus cinereus. 

 a'. Tarsus neither pycnaspidean nor essentially taxaspidean. 



b. Upper posterior portion of tarsus (near heel joint) conspicuously ser- 

 rate, and basal phalanx only of middle toe adherent, for most of its 



length, to the outer toe Lipaugus immundus. 



b'. Upper posterior portion of tarsus not conspicuously serrate, and the 

 middle and outer toes adherent for more than the length of the basal 

 phalanxof the middle toe \tlila wighti.' 



TiTYRA CAYANA (Liniiaeus). 

 Lanius cayanus L., Syst. Nat. ed. 12. I. 1766. p. 137. 

 Tityra cayana Berlepsch & Hartert, p. 55. 



Not comnion. In a.«;cen(Hng the Orinoco this species was noted at 

 various points from Caicara to above the second falls at Maipures, on 

 the upper river. A female collected at Caicara July 3, 1907, was evi- 

 dently nesting- as the ovaries were active. 



Erator inquisitor erythrogenys (Selby). 

 Psaris erythrogenys Selby, Zool. Journ., II. 1826. p. 483. 

 Tityra inquisitor erythrogenys Hellmayr, Novit. Zool. XIII. 1906. pp. 



327-8 (Rio Cataiiapo, Perico, Maipures, Orinoco River, Venezuela). 

 Tityra erythrogenys Berlepsch & Hartert, p. 55 (Perico, Rio Catanapo, 



Maipures, Orinoco River). 



On my first expedition this species was not observed below the 

 Falls of Atures, but on the last two expeditions it was not uncommon 

 about Caicara. 



Eye seal brown ; bill, maxilla black with slate grey basal cutting 

 edges, mandible slate grey; feet dusky slate. 



Peatypsaris MINOR (Lesson). 

 Querula minor Less., Tr. d'Orn. I. 183 1. p. 363. 

 Hadrostomus minor Berlepsch & Hartert, p. 56 (Suapure, Caura River, 



Venezuela). 



This species was included in the Berlepsch and Hartert paper, the 

 Tring Museum having received a specimen from the Caura River. It 

 was not seen by me on the Orinoco proper. 



The American Museum collection contains specimens from the 

 Caura, received from Klages. 



lAs far as I know this species (the type of which came from Trinidad) has not been taken at any 

 point along the Orinoco, but future collecting will probably discover it there. 



