ATTICOEA. 



311 



(No. 34,670, 5 .) Total length, 4.6f. ; wing, 3.75 ; tail, 2.40, depth of fork, 

 .60 ; difference between primariea, 1.65 ; length of .bill from forehead, .32, 

 from nostril, .18, along gape, .46 ; tarsus, .40 ; middle toe and claw, .50, claw 

 alone, .16, hind toe and claw, .34, claw alone, .17. 



A young bird has the upper parts dull dark smoky-brown, with a 

 greenish-blue gloss on the middle of the back only. The under 

 parts are white, tinged with brownish-yellow on the chin, becoming 

 paler on the throat ; a jugular band and the sides, especially behind, 

 strongly tinged with the same. The feathers of the crissum are 

 dark brown, without gloss, and nlargined with paler. A still 

 younger specimen (33,289) has only the faintest possible trace of 

 blue gloss on the back ; the rump is smoky brown, lighter than the 

 wings and tail ; the brownish tinge of under parts deeper and more 

 extended. 



The characters assigned to this variety, although apparently slight 

 and untangible, are •^et quite appreciable on a comparison with a 

 large series of Brazilian specimens. The larger bill and deeper fork 

 of the tail are especially noticeable. The supposed difference in 

 amount of black on the sides may be more apparent than real. 



I am inclined to refer to this variety all the specimens I have seen 

 from Bogota, and one from Peru — these agree in the larger and more 

 depressed bill ; one of the former, however (No. 24,953), has the 

 upper parts with a green lustre, as in bicolor, not blue. 



(24,953.) Green lustre. 



The two species of the subjoined foot-note are introduced to com- 

 plete the history of the subgenus.' 



' Attloora patagonica. 



Hirundo patagonica, D'Okb. & Lafb, Syn. Av. 1837 (Chile and Pata- 

 gonia). 

 Atticora hemipyga, Bdrm. Reise La Plata, II, 1861, 479 (Mendoza). 

 Nab. Uruguay and Patagonia. 



(No. 21,039.) Above, and on sides of head and neck to line of commissure, 

 glossy steel blu« ; the wings and their coverts, with tail, dull dark brown, 

 the lesser coverts only slightly glossed at ends. None of the feathers with 



