320 REVIEW OP AMERICAN BIRDS. [PART I. 



The following references to American Swallows I have not suc- 

 ceeded in identifying : — 



Hirundo unalaschkensis, Gmelin, Syst. Nat. 1, 1788, 1025. "Nigra; subtus 

 cinerea ; uropygio exalbido, rectricibus marginibus rotundatia. Long. 

 4^ unc. Hah. Unalaschka." 



Hirundo andecola, D'Okb. et Lapb. Mag. de Zool. 1837. "Afflnis prece- 

 denti !^H. patagonica) magnitiidine et forma rostri sed differt alis longi- 

 oribus, Cauda fere recta et coloribus. Supra nigra, colore viridi-nitens, 

 alis caudaque vix emarginata nigro-fuscis, rectricibus lateralibus tres 

 lineas tantummodo intermediis longioribus. Subtus gutture coUoque 

 plnmbeis, pectore hypochondriisque cinerascentibua, abdomine medio 

 anoque soHide albisoentibus, tectricibus oaudse Inferis griseo maculatis. 

 Long. 14 cent. Habit, in Andibus, La Paz, Bolivia." 

 This species appears related to Atticora murina or cinerea, but does not seem 



exactly the same. 



Hirundo maculosa, Kuhl (based on Bdfpon, PI. enl. 546, 1). Above 

 lustreless brown ; beneath white, with oval brown spots, closest ante- 

 riorly, more separated towards the tail. Hab. Cayenne. 



