ATTICOEA.— HIEUlSrDO. 231 



it in several parts of the Altos, at an elevation of at least 8000 feet above the sea. 

 In its habits and mode of flight we noticed nothing to distinguish it from other 

 Hirundinidse. 



3. Atticora tibialis. 



Petrochelidon ? tibialis, Cassin, Pr. Ac. PM. vi. p. 370 \ 



Microchelidon tibialis, Scl. Cat. Am. B. p. 39 2. 



Neochelidon tibialis, Scl. Cat. Am. B. p. xvi"; Scl. & Salv. P. Z. S. 1864, p. 347*. 



Atticora tibialis, Baird, Rev. Am. B. i. p. 307 ' ; Scl. & Salv. P. Z. S. 1879, p. 495 \ 



Ftdiginosa, uropygio et corpore subfcus paulo dilutioribus, tibiis plumosis alWs, rostro et pedibus nigricantibus. 

 Long, tota 4-0, alse 3-3, caudse rectr. med. 1-3, rectr. lat. 1-75, rostri a rictu 0-4, tarsi 0-4. (Descr. 

 exempl. ex Panama. Mus. nostr.) 



Edb. Panama, line of railway (M'Leannan ^ s).— Colombia ^ ; Bbazil 1 2. 



Cassin, who first described this peculiar Swallow, gave Brazil as its supposed habitat ; 

 but as it was subsequently obtained by M'Leannan on the isthmus of Panama, the cor- 

 rectness of the statement of its being found in Brazil was doubted ^. It may, however, 

 be worthy of notice that there is a skin of this bird in the Swainson collection at Cam- 

 bridge with the locality "Brazil" on its label. On the other hand, no mention 

 whatever is made of A. tibialis in any of the chief works on Brazilian ornithology, those 

 of Prince Neuwied, Burmeister, Pelzeln, &c. That the bird does occur beyond the 

 limits of the State of Panama is proved by the specimen sent us from the State of 

 Antioquia by Salmon, who found it at Eemedios, where it was breeding, the nest being 

 made of dry grasses and placed in the hole of a bank ^. 



Atticora tibialis has no near allies, but in colour is not unlike A. cinerea. The 

 white tufts on the tibiae are a very distinctive character. 



HIRUNDO. 



Hirundo, Linnaeus, Syst. Nat. i. p. 343 (1766) ; Baird, Rev. Am. B. i. p. 293. 



Only one species of true Hirundo occurs in America, the nearest ally of which is 

 perhaps E. gutturalis, the eastern form of the well-known ff. rustica of Europe. 



The genus itself, as restricted, contains about twenty-five species, which are found 

 distributed over a large portion of the world. 



Eirv/ndo can readily be distinguished from Atticora by the nasal opening being over- 

 hung by a membrane in such a manner that the nostril opens laterally, instead of 

 directly upwards. 



The same character is to be found in Tachycineta ; but in that genus the tail is but 

 very slightly forked, whereas in Eirundo the lateral feathers are attenuated and twice 

 as long as the central feathers. 



