378 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



cc. Outermost primary longer than sixth ; wing-tip nearly twice as long as tarsus, 

 the latter shorter than middle toe with claw; bill more slender; adult 

 males rich blue with wings and tail, together with throat or back, black; 

 adult females plain greenish above, beneath paler and more yellowish, 



more or less streaked with darker Cyanerpes (p. 384) 



hh. Exposed culmen shorter than tarsus; bill more conical (or bent wedge-shaped) 

 with tip acute, 

 c. Outermost primary equal to or longer than sixth; tarsus slightly longer than 

 middle loe with claw; adult males blue and black or yellow and black; 



females much duller in color, without black areas Dacnis (ji. 390) 



ci:. Outermost primary shorter than sixth; tarsus much longer than middle toe 



with claw; adult males neither blue and black nor yellow and black. 



d. Bill more slender, strongly decurved terminally (the gonys more or less 



concave); commissure as long as middle toe with claw; tail rounded; 



under parts white and yellow or gray and yellow, or else whole plumage 



black (sexes alike in color) Coereba (p. 397) 



dd. Bill stouter, not decurved terminally (the gonys straight); commissure 

 shorter than middle toe with claw; tail even or slightly emarginate; 

 adult male dull grayish blue with rufous throat-patch; female brownish 

 above, paler beneath Glossiptila (p. 423) 



Genus DIGLOSSA ^A/agler. 



Diglossa Wagler, Isis, 1832, 280. (Type, D. haritula Wagler.) 



Agrilorhinus Bonaparte, Nuovi Ann. Sc. Nat. Bologna, i, 1838, 408. (Type, 



A. sittaceun Bonaparte, =Diglossa haritula Wagler. ) 

 Ancylorhinus (emendation) Sclater, Ibis, 1875 204 (ex Agrilorhinus Bonaparte). 

 Srrrirostrum Lafkesnaye and D'Okbigny, Mag. de Zool., 1838 (Synopsis Avium, 



ii, p. 24). (Type, S. carhonarinin Lafresnaye and D'Orbigny.) 

 Uiiciroslrum Lafresnaye, Rev. Zool., 1839, 100. (Type, Serrlrostrum carbonarium 



Lafresnaye and D'Orbigny.) 

 Oniipi/lops LiOHTBNSTEiN, Nomencl. Av. Mus. Berol., 1854, 56. (Type, C. hamulus 



Liehtenstein, =Z>tj5f/o.s'.','(/ haritula Wagler.) 

 7'i?/)7/7wH(//o.w(, Cassin, Proc. Ac. Nat. Sci. Phila., xvi, Nov., 1864, 273. (Type, 



Serrirostrum carbonariiim Lafresnaye and D'Orbigny.) 

 Pyrrhodiglossa Cassin, Proc. Ac. Nat. Sci. Phila., xvi, Nov., 1864, 274. (Type, 



Diglossa mystacali.i Lafresnaye. ) 

 Oyanodiglossa Cassjn, Troc. Ac. Nat. Sci. Phila., xvi, Nov. , 1864, 274. (Type, 



Agrilorhinus personal IIS Fraser. ) 

 MelanodiglossaGKSsm, Proc. Ac. Nat. S<-i. Phila., xvi, Nov., 1864,274. (Type, 



Undrostrum lafresnayei Boissoneau. ) 



CoerebidiB with the bill much compressed and inclined upward ter- 

 minally/ the tip of the maxilla abruptly hooked or uncinate; mandible, 

 recurved, falcate, very acute at tip, with base of gonys decidedly pos- 

 terior to nostrils. 



Bill shorter than head, its lower outline conspicuously longer than 

 the upper; culmen more or less ele-\'ated basally, then straight or 

 more or les.s concave, the terminal portion abruptly decurved, the tip 

 of the maxilla forming a distinct hook or unguis, preceded by a more 



' The upward inclination of the bill in this genus is a very striking feature. In 

 most birds the bill projects on a line with the longitudinal axis of the head, but in 

 Dlglonsa it inclines upward at a very decided angle with this axis. 



