320 REVIEW OF AMERICAN BIRDS. [PART I. 
The following references to American Swallows I have not sue- 
ceeded in identifying :— 
Hirundo unalaschkensis, Gmetin, Syst. Nat. I, 1788, 1025. “ Nigra; subtus 
cinerea ; uropygio exalbido, rectricibus marginibus rotundatis. Long. 
45 unc. Hab. Unalaschka.” 
Hirundo andecola, D’Ors. et Larr. Mag. de Zool. 1837. “ Affinis prece- 
denti (H. patagonica) magnitudine 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 colloque 
plumbeis, pectore hypochondriisque cinerascentibus, abdomine medio 
anoque sordide albiscentibus, tectricibus caudz 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, Kus (based on Burron, Pl. enl. 546, 1). Above 
lustreless brown; beneath white, with oval brown spots, closest ante- 
riorly, more separated towards the tail. Hab. Cayenne. 
