541 



crisso et hypochondriis dorso concoloribus : alarum tectricibus 

 minoribus nigricantibus ad apicem albo punctatis : campterio 

 albo : rostro nigro, pedibus obscure brunneis : periophthalmio 

 denudato. 

 Long. tota5"0, alse 2-5, caudse 17, rostri a rictu - 85, tarsi 1-2. 

 Hab. In isthmo Panama (Delattre) et in rep. Nicaragua. 

 Mus. Derbiano, sp. 4939, et Acad. Philadelph. 

 This species may be placed between M. hemimelcena and M. cin- 

 namomea in my arrangement. In colouring it somewhat resembles 

 the former, but it is of a much stronger build, and has no white 

 markings in the interscapularies. The bill is shorter than in M. cin- 

 namomea, but the form otherwise nearly similar. The single spe- 

 cimen in the Derby Museum is marked with one of Delattre' s tickets 

 " Male, Panama," and was acquired by the late Lord Derby in 1846. 

 Another example of this same bird, of which I have a note, is in the 

 splendid collection belonging to the Academy of Natural Sciences of 

 Philadelphia. It is labelled ' Nicaragua.' I took a description of 

 it in the autumn of 1856, but was loath to publish it without seeing 

 a second specimen. 



2. Dysithamnus olivaceus. 



Thamnophilus olivaceus, Tsch. Consp. Av, p. 278, et Faun. Per. 

 p. 174. 



Dysithamnus olivaceus, Cab. Orn. Not. i. 223 ; Bp. Consp. p. 199. 



S . Olivaceus : pileo cinerascente, capitis lateribus concoloribus : 

 subtus pallide cinereus ; gutture ventre medio et crisso albi- 

 cantibus : campterio albo : alarum tectricibus albo anguste 

 marginatis. 



Long, tota 5*0, alee 2*5, caudse 1*7. 



Hab. In Bolivia {Bridges). 



Mus. Derbiano. 



A distinct species of Dysithamnus nearly allied to D. mentalis, 

 but recognizable by the absence of the black ear -mark, and darker 

 colour of the sides below. I did not include it in my Synopsis, not 

 having then met with specimens. The example in the Derby 

 Museum from which I take my characters, was obtained through Mr. 

 Cuming in 1846, and was doubtless among the Bolivian birds col- 

 lected by Mr. Bridges. 



I have to express my acknowledgments of the liberality of the 

 Trustees of the Derby Museum, in allowing me the use of these and 

 several other birds for examination. Without actual comparison of 

 specimens it is nearly hopeless to attempt to determine species of this 

 and other similarly-complicated groups. 



3. Note on the Genus Cichlopsis of Cabanis. 

 By Philip Lutley Sclater. 



In the second part of the General Report upon the Zoology of 

 the Pacific Railway routes, the sheets of which Prof. Baird has been 



