CAMPYL0RHYNCHU8. 



103 



lio-ht stripe, however, wider and whiter. The under parts are very 

 KJinilar. Tlio bands on the tail are not so decidedly transverse, but au 

 edging of Ijrown along the shafts often divides the light bar. In tlm 

 otlier vspecies it is the concealed centres of the liood feathers that are 

 bruwn (showing only occasionally), with yellowish-gray edges. The 

 nape is much less conspicuously streaked. C megalopterun \n con- 

 siderably larger also, measuring 8.50 inches, the wing ,?.V0, tail 3.90. 

 Tins may be a Mexican bird, as stat(^d by Lafresnaye, but more 

 probably it is South American. 



1 am by no means decided as to what is the true name of this 

 Mexican species, after setting aside that of megalopterus. A 

 specimen in the Phila. Acad., from. Guayaquil, and labelled " pallea- 

 cens,^^ by Mr. Sclater, agrees very well with a Smithsonian skiu 

 from Piura, Peru, No. 11,748. This differs from the Mexican bird 

 in a larger size, and in having a longer tail and shorter wings — tail 

 half an inch longer than the wingji instead of being a little shorter 

 or not longer. The top of the head is purer gray, or with less of a 

 yellowish-red tinge ; the nuchal streaks much wider and more promi- 

 nent. The most striking differences, however, are in the proportions 

 above mentioned, as well as the very different geographical distri- 

 bution. 



The question now remains as to which of these two species the 

 nanic pallesccns should be applied. As, however, Lafresnaye, in 

 comparing pallescens with zonalhn, says that it differs especially in 

 form from the latter by longer wings ; and as while the Mexican 

 bird has much longer wings than the South American, which are 

 just equal to those of zonatus, it seems proper to name the Mexican 

 bird pallescens, especially as Lafresnaye gives Mexico as the pre- 

 sumed locality of his species. The South American bird (the G. 

 pallescens of Sclater's Catal.) may then be called Campylorhynchus 

 baUeatus. 



Gampylorhynchus nuchahs is easily distinguished by smaller 

 size ; broader stripes on the neck, extending on the back ; the rounded 

 marginal white spots, not bands, on the tail, etc. 





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