104 Proceedings of the Biological Society of Washington. 



heavier. In color there seems to be little difference in the four forms 

 nnder consideration, except that F. a. Columbiana appears to average 

 slightly darker than F. a. americana, and the white edging on the outer 

 primary and the white tips on the inner secondaries more restricted ; in 

 these respects F. a. grenadensis resembles F. a. columbiana. The measure- 

 ments of the four forms are as follows : 



Depth 



of bill 



at base. 



Five females of F. caribxa . . . . 

 Six females of F. a. americana . , 

 One female of F. a. grenadensis . . 

 Three females of F. a. columbiana 



14.8 

 13.5 



17.5 

 16 



Creciscus murivagans sp. nov. 



Type, male adult, U. S. National Museum, No. 159,769, Lima, Peru, 

 Oct. 1, 1889. Collected by J. Kalinowski. 



Similar to Creciscus salinazi, but lighter botli above and below and 

 with the white bars on the back and wings more numerous and better 

 defined . 



Description. — Top of head blackish slate; nape mars brown, .shading 

 into russet on hind neck and upper back; back and scapulars fuscous 

 washed with russet and crossed with numerous huffy and white bars ; 

 rump and upper tail-coverts fuscous narrowly barred with white and 

 buff; tail fnscous-black narrowly barred with white; sides of face, throat, 

 and breast deep neutral gray, slightly lighter on sides of face and throat; 

 lores blackish slate with an indistinct lighter loral streak ; abdomen pinkish 

 buff with obscure dusky bars; anal region and cri.ssum light pinkish 

 cinnamon, with fuscous and white bars basally concealed; flanks fuscous 

 with white or buffy wliite bars; bend of wing white; wing-coverts a little 

 lighter than the back barred with white ; remiges hair brown with 

 irregular white spots on the outer web and elliptical spots of white on the 

 inner webs, these spots increasing in size inwards; under wing-coverts white 

 with a few dusky markings; thighs light pinkish cinnamon. Wing, 76; 

 tail, 33.5; culmen, 15; tarsus, 22.5; middle toe, 24.5. 



Remarks. — From Creciscus jamaicensis the above species differs in being 

 lighter above, especially the hind neck, which is quite a different shade 

 of brown (russet), carob brown in Creciscus jamaicensis. The bars on 

 the back in C. murivagans are better defined and do not show a tendency 

 to break up into spots as they do in C jamaicensis. 



The Museum possesses an immature female taken on the same day and 

 place and by the same collector as the type. It differs from a female of 

 Creciscus salinazi in about the same stage of plumage in being lighter 

 both above and below, with the chin and throat more extensively whitish. 



