Mr. P. L. Sclater o?i some new species of Ant- Thrtishes. 59 



L^ subulatOy mandihula superiore nigricmite, inferiore pallide 



plumb ea : pedibus plumbeis. jj ^^^ ;^q ooiioa utU 



Long, tota 4*0, alse 2*0, caudse 1*7. ?i mo'i\ IwW^O'^t ri'^Sff 



This is an exceedingly pretty species of Formicivora, distinguished 



by the bright chestnut colouring of its lower back, above wl)ich, in 



the middle of the back, are a few black-tipped feathers, forming a 



small black patch. It must be placed next to the Brazilian Formi- 



civoramacuJata, (Max.) {Leptorhynchus striolatus, Menetries, Mem. 



de I'Ac. St. P. 1835, pi. 10. fig. 2*), with which it agrees in form and 



style of plumage. A single example of it is in the British Museum. 



5. Dysithamnus semicinereus. 



<? cine?'eus, pileo intensiore ; subtus medialiter albicantior : dorso 

 ^ postico et remigum marginibus cum ventre imo olivascentibus : 

 ^^ tectricibus alarum tenuissime albo limbatis : rostra pedibusque 

 J nigris. 



^ ^ olivacea, pileo rufescente : gutture medio alboy lateraliter 

 cinerascente : ventre Jlavicanti-olivaceo ; mandibula inferiore 

 basi albicante. 

 Long, tota 4'5, alse 2*4, caudse 1*6. 



In this apparently n^w Dysithamnus , of which the British Museum 

 contains several specimens, the cinereous colour in the male occupies 

 the whole upper plumage down to the middle of the back, where it 

 gradually passes into olive, and the whole lower plumage down to 

 the middle of the belly, where a like colour supervenes. The middle 

 of the body beneath is much paler. The bill is rather longer than 

 in D. mentalis, but the form is otherwise the same. The genus to 

 which this bird belongs is certainly very closely connected with 

 ThamnophiluSy but I doubt whether that form can be divided even as 

 a subfamily from the South American Ant-thrushes. 



6. PyRIGLENA TYRANNINA. \ G BJot _ 



. 3 nigricanti-cinereus, carpo summo et alarum tectricum margini- 

 bus alb is : plaga dorsi medii interna nivea : subtus paulo pal- 

 ^ lidior, rostro et pedibus nigris. 



' ? pallide brunnea, rufescente tincta ; abdomine toto dare rufo : 

 'l\' mandibula inferiore, nisi apice alba. 

 Long, tota 5*2, alse 2*5, caudse 2*^5. 



A series of specimens in the British Museum clearly connect the 

 somewhat dissimilar male and female of this species, which it is diffi- 

 cult to place satisfactorily in any of the present established genera 

 of this family as far as I am acquainted with them, though without 

 doubt a member of the group, with somewhat of a Tyrannine aspect. 

 The characteristic white patch underneath the feathers of the back 

 is well marked in both sexes. 



* M. Menetries has made this bird a second species of his genus Leptorliynchiir, 

 but I do not think it can be satisfactorily arranged along with the peculiar form 

 which he has made the type of his genus ; and the name Leptorhynchus being 

 preoccupied, I propose to change it into Psilorhamphus. Type P.guttaitts, mihi. 

 {Leptorhynchus guttatus, Men. pi. 10. fig. 1.) "^ ?.TS'tVA\s«M?^% , &stji>s\^ 



