230 . HIRUNDINID A. 
Supra chalybeo-cyanea, capitis lateribus, tectricibus alarum minoribus crisso et pectoris lateribus concoloribus ; 
subtus alba, alis et cauda nigricantibus; rostro nigro, pedibus corylinis. Long. tota 4:5, ale 3-7, caudex 
rectr. med. 1°5, rectr. lat. 2-1, rostri a rictu 0°45, tarsi 0-45. (Descr. exempl. ex Costa Rica. Mus. 
nostr.) 
Hab. Costa Rica*!, San José (Hoffmann ®, Carmiol™ 1), Barranca (Carmiol™ 12) ; 
Panama, Calovevora (Arcé*).—Sourn AMERICA generally to Bolivia", Paraguay ’, 
and the Argentine Republic 2°69”, 
Vieillot first described this Swallow, using for his basis Azara’s “ Golondrina de los 
timoneles negros” from Paraguay. We possess specimens from the adjoining provinces 
of the Argentine Republic, which doubtless represent the bird of Paraguay; and these 
do not differ in any important respect from our Costa-Rica examples, nor from many 
others from intermediate localities, the bird being spread over the whole of Tropical 
America. Prof. Baird, it is true, separated more northern individuals from those of 
Brazil and the basin of the La Plata; but the differences are very slight indeed. 
Aiticora cyanoleuca seems to be a common bird wherever it is found. It probably 
breeds in Costa Rica; but the only evidence we have on this point is the skins of young 
birds from that country in their first plumage. In Colombia” and Brazil it certainly 
breeds *, laying white eggs. Of its nesting-habits in the Argentine Republic Mr. W. 
H. Hudson has given us an account*. It appears there in September, and uses forsaken 
holes and burrows for its nesting-place. 
2. Atticora pileata. (Tab. XV. fig. 2.) 
Atticora pileata, Gould, P. Z. 8. 1858, p. 855"; Scl. & Salv. Ibis, 1859, p. 137; Baird, Rev. Am. 
B. i. p. 807°. ° 
Supra obscure brunnea, uropygio paulo saturatiore, pileo et capitis lateribus nigris pupureo tinctis, alis et cauda 
fusco-nigris ; subtus alba, gutturis plumis singulis fuscis albo marginatis, hypochondriis fuscis ; crisso 
nigro; rostro nigro, pedibus obscure corylinis. Long. tota 4:5, ale 3-6, caude rectr. med. 1°35, rectr. 
lat. 2°0, rostri a rictu 0°45, tarsi 0-45. (Descr. maris ex Coban, Guatemala. Mus. nostr. ) 
@ mari omnino similis. 
Hab. Guatemata (Skinner+?), Coban (0. 8. & F. D. G.8), Quiché, Totonicapam, 
Quezaltenango, Barranco de Los Chocoyos, Calderas, ridge above Barsinas, Villa 
Lobos, Aceytuno (0. 8. & F. D. G.). 
An interesting and peculiar species, only found, so far as we yet know, in the higher 
parts of Guatemala, whence specimens were sent by the late G. U. Skinner to Gould, 
who described them in 1858. Our first intimate acquaintance with this Swallow was 
in February 1862, when staying at Coban, where it was a common species, frequenting 
the great church of the town; and our specimens were secured as they flew round 
over the courtyard of the house where we were staying, and which was close to the 
church. Having thus become familiar with the bird, we frequently observed it 
subsequently in the higher lands of the main Cordillera. Thus it was common at 
several points on the road from the city of Guatemala to Antigua, and we also observed 
* PZ. 8. 1872, p. 844, 
