528 Annals of the Carnegie Museum. 



to olivaceous. The gray color of the crown, superciliaries, and under 

 parts also varies greatly in depth and purity, as well as the buffy shad- 

 ing of the flanks and crissum. Nor are there any real average differ- 

 ences in size in birds from various parts of the range of the species. 

 Bonaparte states that his Arremon conirostris came from " Brazil," 

 but this was obviously an error, and Messrs. Hellmayr and von Seilern 

 have recently fixed Bogota as the type-locality. Birds from this re- 

 gion, contrary to the implication of these authors, prove to be quite 

 indistinguishable from the rest of the series examined, which includes 

 specimens coming from the type-locality of venezuelensis. Accord- 

 ingly, as suspected by the writer for some time, this name will fall as 

 a pure synonym of conirostris. Arremonops conirostris inexpectatus, 

 recently described by Dr. Chapman from Andalucia, Huila, Colombia, 

 and which has been examined in this connection, proves to be an easily 

 recognizable geographical variant of conirostris. Arremonops chry- 

 soma, however, would seem to be specifically distinct, and it is furthei 

 to be remarked that the Central American form of this restricted 

 group, Arremonops richmondi, is certainly far more closely related to 

 the latter than to conirostris, despite the gap between their respective 

 ranges. 



In the Santa Marta region Arremonops conirostris conirostris evi- 

 dently inhabits the whole of the littoral Tropical Zone, from the Mag- 

 dalena on the west as far as Dibulla and Loma Larga to the east. 

 It is a rare bird, especially so in the dry portion of the coastal plain, 

 where it is found only in the irrigated pastures, etc. Specimens col- 

 lected at Bonda by Mr. Smith were' at first erroneously referred to 

 Buarremon assimilis by Dr. Allen, but this mistake was corrected 

 later. Dr. Allen has also described the nest and eggs of the species, 

 forwarded by the same collector. These were all from Bonda, under 

 dates ranging from April i8 to May 4, and contained two eggs each, 

 pure white in color. " The nests, bulky and deeply cup-shaped, are 

 placed in the fork of a branch, and differ much in the materials of 

 which they are constructed. One is composed outwardly of dead 

 leaves, lined with plant stems and fine tendrils of some vine. Another 

 is composed outwardly and also lined with pieces of broad leaves of 

 some sedge or flag, mixed with plant stems, the latter forming a sort 

 of middle layer. Another is composed externally of fine grass leaves, 

 and internally of broad blades of grass or sedge and fine plant fibers. 



