Ornithology of Central America. 1 19 



the very thickest underwood, uear, but not upon the ground. 

 It is by no means shy, but it is hard to procure good specimens 

 from the difficulty of keeping it in sight at a distance sufficient 

 to avoid spoiUng them. 



131. Thamnophilus melanurus, Gould? 



Vicinity of Omoa (Leyland). It is likely that this northern 

 bird is really specifically distinct from the true T. melanurus of 

 the valley of the Amazons. 



Subfam. FoRMicivoRiNiE. 



13.2. FoRMicivoRA BoucARDi, Sclatcr, P. Z. S. 1858, p. 300. 

 Mr. Leyland obtained a female specimen near Omoa. 



133. Cercomacra tyrannina, Sclater, P. Z. S. 1858, p. 245. 

 A pair of this species are in the Derby Museum, obtained 



near Coban by Delattre. Mr. Leyland obtained one example — 

 a female — near Belize. 



Subfam. Formicariin^. 



134. Gymnocichla nudtceps (Cassin) ; Sclater, P. Z. S. 

 1858, p. 274. 



Vicinity of Omoa (Leyland). 



135. Grallaria guatemalensis, Prev.,Voy. Venus, Ois. t. 2; 

 Sclater, P. Z. S. 1856, p. 294. 



Specimens of this bird in the Derby Museum at Liverpool 

 were collected by Delattre at Coban in June 1843. 



Fam. XVII. TYRANNIDiE. 



Subfam. T^niopterin/E. 



136. Sayornis aquatic a, sp. nov. 



Fuliginosa : secundariis alarum et caudse rectrice extima extiis 



albo marginata : ventre medio albo : rostro et pedibus ni- 



gerrimis : long, tota 925, ala» 3*25, cauda> 3-], tarsi 0-7, 



. rostri a rictu '8. 



Aff. Sayornithi nigricanti et S. cineracece, sed ab hac alis minus 



albis et pogonio rectricis cxtimse non omnino albo, ab 



ilia crassitie minore et crisso fuliginoso distinguenda. 



This species is resident at Duenas, where it may always be 



K 2 



