202 VIEEONID^. 



differences of colour, but also in the relative length of the spurious primary. They 

 were therefore described as Vireo ochraeeus ^ and V. semifiavus ^ respectively. 

 Prof Baird, however, to whom the types were submitted with the advantage of two 

 additional specimens for examination, came to the conclusion that the differences 

 observable were not greater than might be expected in birds shot, the one in January 

 and the other in April. He therefore united Y. ochraeeus and V. semifiavus under 

 the former name 2. We now possess two additional examples : one, from Progreso, 

 agrees with the type of V. semifiavus ; the other, from Corosal in British Honduras, is 

 exactly similar to V. ochraeeus. Any supposed difference in locality is therefore broken 

 down, and Prof. Baird's view strengthened rather than otherwise. We therefore follow 

 him in placing V. semifiavus as a synonym of Y. ochraeeus ; at the same time we may 

 remark en passant that the difference between the types is more pronounced than those 

 to be traced between such races as Y. solitarius, Y. eassini, and Y. propinquus, or 

 Y. gilva and Y. swainsoni. 



Y. ochraeeus is a little-known bird, and only twice came under our observation — 

 once in April 1862 in a copse in the savana country near Sakluk, in the Department 

 of Peten, and again in January 1863 in the woods skirting the Pacific shore near the 

 Guatemalan port of San Jose. From this last bird, a female, our figure is taken. 



17. Vireo pallens. (Tab. xil. fig. 2.) 



Vireo pallens, Salv. P. Z. S. 1863, p. 188'; Ibis, 1866, p. 193'; Baird, Rev. Am. B. i. p. 365'. 



Supra obscure olivaceus ; taenia prseoculari pallide flava ; subtus sordide albus flavido vix tinctus ; alia et cauda 

 nigricanti-fusois, Ulis albido limbatis et bifasciatis, hac dorsi colore marginata ; rostri maxiUa pallide 

 cornea, mandibula albida. Long, tota 4-6, alse 2-3, caudse 1-9, rostri a rictu 0-65, tarsi 0-85. (Descr. 

 maris ex Punta Arenas, Costa Eica. Mus. nostr.) 



Hah. NiCAEAGUA, Eealejo ^ (,/. M. Dow & 0. S.^) ; Costa Pica, Punta Arenas (J". M. Dow 

 & 0. S.^). 



Of this species nothing, so far as we know, has been noticed since the original 

 specimens were procured in March 1863 at Realejo (now called Corinto) and at Punta 

 Arenas by Capt. Dow and Salvin during a voyage from Guatemala to Panama. In 

 both cases the birds were found in the woods behind those seaport towns. In their 

 habits nothing of special note was observed. In its general appearance this bird is 

 not unlike Y. pusillus of Arizona and Lower California, having hardly any olive-colour 

 in its plumage, the upper parts being ashy, and the under parts white, with but a very 

 faint shade of olive-colour*. It may be distinguished from Y. pusillus by the presence 

 of two white bands on the wings instead of only one, and in the wings being more 

 rounded. The shape and size of Y. pallens is much that of Y. ochraeeus ; but it wants 

 the colour of that bird, besides having a longer spurious first primary. The Punta 

 Arenas specimen, a male, is figured. 



* The figure is rather too highly coloured. 



