320 REVIEW OF 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 

 cineiea ; uropygio exalbido, rectricibus inarginibus rotundatis. Long. 

 41 unc. Huh. Unalaschka." 



Hirundo andecola, D'Orb. et Lafr. Mag. de Zool. 1837. "Affinis prece- 

 dent! {H. pdlagonka) magnitudiue et forma roatri sed diflfert alls longi- 

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

 alis caudaque vix emarginata uigro-fuscis, rectricibus lateralibus tres 

 lineas tantummodo intermediis lougioribus. Subtus gutture colloque 

 plumbeis, pectore hypocliondriisque cinerascentibus, abdomine medio 

 anoque sordide albiscentibus, tectricibus cauds 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 Bcffon, PL enl. 546, 1). Above 

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

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



