MELANOTia P0NAC0B1U8. 



b1 



MeaRurement (2B,374). Length, 10.75; wing, 4.80; tall, 5.40; bill from 

 gape, 1.35 ; noHtril, .70 ; tarsus, 1.1b ; middle tot) and claw, 1.10 j oiaw tiluiie, .30. 



(29,3^3.) Length, 10. Iris brown. (30,13A.) Length, lO.fiO. Irlt brown. 



nielanotis hypoleiictis. 



Melanotic hypoleur.us, HARTLAun, R. Z. Oct. 1852, 400. — Ib. Jour. f. 

 Ornith. 1853, 30.— Sclatkh & Salvix, Ibis, I, 1850, 7 (eggs).— In. 

 II, 1860, 29.— ScLATKK, P. Z. S. 1851), 337.— Ib. Catal. 1861, 7, uo. 43. 



Ilab. Guatemala. 



Total length, 10.00 ; wing, 4.00 ; tail, 4.90 ; difference of tail feathers, 1.25 ; 

 exposed portion of 1st primary, 1.50 ; of 2d, 2.40 ; length of bill from forehead, 

 1.15, from nostril, .68; along gape, 1.32; tarsus, 1.2(); middle toe and claw, 

 1.10; claw alone, .30; bind toe and claw, .75 ; claw alone, .37. 



DONACOBIUS, SwAiNSOK. : . ,- -;^,i 



Donacohins, Swainson, Class. Birds, II, 1831, 236. (Type D. vociferans, 

 Sw. = Tardus atricapillus, L.) 



Bill as long as head, notched. Bristles distinct, reaching to nostrils. Nasal 

 groove broad, filled by a plane, tense, naked, thin edged membrane ; the 

 nostrils pervious, occupying the anterior extremity of the groove, bordered 

 behind only by membrane ; broadly oval, the axis rather oblique. A large, bare 

 naked space on each side the neck. Wings shorter than the much graduated 

 tail. First primary about half the longest (fifth) ; 2d shorter than the 

 secondaries. Tail feathers broad ; outer webs of lateral feathers having their 

 outer webs half as wide as the inner. Graduation excet^sive ; outer feather 

 about half the middle. 



Tarsi little longer than middle toe and claw, with six scntellie anteriorly 

 fused into a continuous nngrooved plate on the outer side. Claws lengthened, 

 moderately curved. Inner toe cleft to base. 



