The back of the male of this bird is always varied with black ; but 

 I have one specimen in my possession, otherwise not varying much 

 in plumage, in which the whole interscapulium is black. This is 

 perhaps Dr. Kaup's Ps. marginatus minor (P. Z. S. 1851, p. 48). 



14. Pachyrhamphus major. 



Bathmidurus major, Cab. Orn. Not. p. 246. 



Psaris major, Bp. Consp. p. 181. 



Pachyrhamphus marginatusl, Sclater, P. Z. S. 1856, p. 298. 



$ . Supra cinereus ; ( dorso medio nigro aut nigro mixto : torque 

 cervicali postico albo-griseo : pileo nitenti-nigro, linea frontali 

 albida : scapularibus albis : alis nigris, tectricibus et secunda- 

 riis albo limbatis : subtus albus cinereo tinctus ; cauda nigra 

 rectricibus lateralibus late albo terminatis : rostro nigro-plum- 

 beo : pedibus nigris. 

 ¥ . Supra castanea, pileo nigro : alis nigris castaneo marginatis : 

 subtus pallide viridi-flavicans, lateribus rufo tinctis ; cauda 

 nigra, rectricibus duabus mediis et ceterarum apicibus rujis. 

 Long. 6 - 0, alee 33, caudse 2'4. 

 Hab. S. Mexico, Xalapa (Cab.) (Salle). 

 Mus, Heineano et P. L. S. 



This Mexican representative of P. marginatus may be easily re- 

 cognized by its large size and the grey cervical collar between the 

 black nape and the back. M. Salle's specimens were procured near 

 Xalapa, whence Dr. Cabanis's type, which was a female, also came. 

 No description of the male bird has hitherto appeared. 



15. Pachyrhamphus albo-griseus, sp. nov. 



<? . Supra cinereus, pileo cum nucha nitenti-nigris : linea frontali 

 inter oculos alba : alis nigris, tectricibus et secundariis extus 

 late albo marginatis : subtus albus, prcecipue apud latera cine- 

 rascente tinctus : cauda nigra, rectricibus omnibus, sed harum 

 extimis prcecipue, late albo terminatis : rostro plumbeo : pedi- 

 bus nigris. 

 ? . Saturate castanea, subtus valde dilutior, cinnamomescenti- 



ochracea. (?) 

 Long, tota 5'5, alae 3*0, caudse 2*4. 

 Hab. New Grenada, Bogota. 

 Mus. P. L. S. 



I possess an adult male specimen, and what, I think, is probably 

 the female of this Becard, which is a close ally of the two preceding 

 species. It is, I suppose, the New Grenadian representative of the 

 form ; and, I confess, it is not without hesitation that I separate it 

 specifically from P. marginatus. The differences are the further 

 extension of the black over the nape of the neck, the entire want of 

 black on the back, the more purely white colouring below, and the 

 much deeper white terminations of the outer rectrices in the present 

 species. 



