Species of the Fanuly Icteridae. 153 



The five specimens of this species before me, four from 

 Bolivia and two from Peru, agree generally in the characters 

 above given ; but in one of the Peruvian specimens the third 

 and fourth pair of rectrices have no green at the tips. In 

 all cases, however, the wholly olive-green colour of the four 

 middle tail-feathers (as pointed out by Dr. Cabanis) seems to 

 discriminate 0. atrovirens from the four nearly allied species 

 which follow. 



^' 8. OsTiNOPS sALMONi, sp. uov. (Plate VI.) 



Ostinops atrocastaueus, Scl. et Sal v. P. Z. S. 1879, p. 509. 

 Supr^i brunnescenti-castaneus, dorsa postica dilutiore, in ful- 

 vum transeunte ; fronte lata flava ; alis- extiis nigris : 

 subtus nigricanti-olivaceus, lateribus fulvo mixtis; tibiis 

 nigris ; crisso fulvo, uropygio concolori ; cauda flava, 

 rectricibus duabus mediis totis et paris proximi pogonio 

 interno nigris, rectrice laterali una extinia et paris 

 seeundi pogonio externo prsecipue ad apicem olivaceis ; 

 rostro flavo, pedibus nigris : long, tota (maris) 18'5, 

 alse 9"5, caudse 8*5 ; (fem.j 15, alse 7'5, caudse 7. 

 Hab. Antioquia [Salmon). 



In our catalogue of Mr. Salmon^s collections from Antio- 

 quia, Mr. Salvin and I united this form to 0. atrocastaneus. 

 But on close examination of the fine series of these birds now 

 before me, it would seem that the Antioquian bird may be 

 easily distinguished by the much darker hues of its lower 

 surface. The whole breast and abdomen are of a dark olive, 

 with a slight tinge of the chestnut-brown only on the flanks ; 

 and the thighs are almost black. In 0. atrocastaneus the 

 whole under surface is of a rich uniform chestnut-brown, 

 and the thighs are but slightly darker. ..^-- 



I propose therefore to separate the Antioquian form under 

 the name of its energetic discoverer. 



9. Ostinops atrocastaneus. 



Cassicus aJfredi, DesMurs, Voy. Cast. Ois. p. 0)7 , t. xix. 

 fig. 2 (1855) (?). 



Ostinops atrovirens, Scl. P. Z. S. 1859, p. 140, 1860, p. 88 

 (Ecuador) ; Scl. et Salv. P. Z. S. 186G, p. 182 (Ucayali), et 

 1873, p. 266 (Amazons). 



