282 REVIEW OF AMERICAN BIRDS. [PART I. 



So far as I can ascertain, this species has never received a dis- 

 tinctive appellation. Specimens from Panama, apparently identical, 

 have been labelled P. chalyhea, by Mr. Cassin and Mr. Lavi^rence ; 

 but as explained below,' I cannot agree with their conclusions, or 

 those of Cabanis. 



There are in the collection specimens of a closely allied, though 

 larger species, from Bolivia, which I have referred to the P. do- 

 viestica, named from Azara.^ 



' Progne chalybea. 



Hirnndo chalyhea, Gmelin, S. N. 1, 1788, 1026 {Hirundo caijanenais, Bkis- 

 soN, II, 495, tab. 46, fig. 1 ; Bpff. VI, 075 ; PI. eul.545, fig. 2, Cayenne). 



Hah. Cayenne. 



Of this species I have never seen a specimen, or one agreeing unmistakably 

 with the minute account of the above mentioned authors. 



As described by Brisson (L'Hirondelle de Cayenne), it is steel black above, 

 with the oitire under parts grayish-brown. The lateral tail feather exceeds 

 the middle by six lines. Length, 6 inches ; bill, 9] lines ; tarsus, 5 lines ; 

 middle toe and claw, 7 lines. Buffon speaks oii it as lustrous violet black above, 

 beneath rcddish-grai/, veined with brown ; lighter on the lower parts of belly 

 aud crissum. Length, 6 inches ; bill, 9J lines ; tarsus, 5 or 6 lines, etc. The 

 size is thus raucli as in Brisson's bird ; the lower parts reddish-gray, varied 

 with brown, jmler behind, instead of grayish-brown. Neither author refers 

 to any white whatever on under parts. In size the species agrees better with 

 P. leucogaster than any other true Progne, and it is barely possible the two 

 may be the same, but I cannot reconcile the apparent differences. It would, 

 at any rate, be strictly in accordance with the usual law of distribution of 

 South American birds to find the Cayenne species specifically diflerent from 

 the Central American. 



^ Progne domestica.' 



Iliruiido domestica, Vieill. Nouv. Diet. XIV, 1817, 521 (Gohmdrina do- 

 mestica, D'AzARA, Apuut. II, 1805, 502, no. 300, Paraguay). — Vieill. 

 Encycl. Meth. II, 1823, 527. — ?Progne domestica, Gray, Genera. — 

 Ib. Catal. Fiss. Br. Mus. 1848, 28 (Bolivia).— Cabanis, Mus. Hein. 

 I, 1850-1, 51 (Rio Grande do Sul).— Burmeister, Ueb. Ill, 142.— 

 Ib. Reise La Plata, II, 1861, 477 (La Plata). 

 Hab. Paraguay and Bolivia. 



(No. 16,834, young male, Bolivia.) Above steel blue, much as in P. sithis. 

 Beneath, from chin to breast, and on sides, smoky brown. Rest of under 

 parts white, the shafts mostly dusky. Feathers tipped with steel bine, form- 

 ing as a kind of collar across the jugulum and along the sides of body ; no 

 trace of them on the chin, throat, and abdominal region, not even in the pin 

 feathers. 



A second specimen, also probably young male, is still lighter on the throat 

 and breast, almost white on the latter, although clouded with brown, and with 



