BIRDS OF NORTH AND MIDDLE AMERICA. 453 



feathers of upper throat normal (not elongated); a black jugular tuft (as in 

 all other genera except Hylomanes); much larger (length about 250 mm.)- 



Aspatha (p. 482). 



cc. Tail shorter than wing, the lateral rectrices more than one-tliird as long as 



middle pair, the latter exceeding next pair by less than one-third the length 



of exposed culmen; feathers of upper throat elongated; iio black jugular 



tuft; much smaller (length much less than 200 mm.) . .Hylomanes (p. 484). 



Genus MOMOTUS Brisson. 



Momotus Brisson, Om., iv, 1760, 465. (Type, Ramphastos momota Linnseue.) 

 Prionites Illiger, Prodromus Orn., 1811, 224. (Type, Rmnphastos viomota 



Linnaeus.) 

 Prionitis (emendation) Voigt, Thierreich, i, 1831, 660. 

 Baryphonus Vieillot, Analyse, 1816, 48. (Type, Momot BuSor\= Ramphastos 



momota Linnaeus.) 

 Barryphonus a (emendation?) Vieillot, Analyse, 1816, 69. 

 Crybelus b Cabanis and Heine, Mus. Hein., ii, Nov. 26, 1859, 112. (Type, 



Momotus viexicanus Swainson.) 



Medium-sized to large Momotidse (length about 285-^60 mm.) 

 \vitli twelve rectrices, the middle pair (normally) with webs denuded 

 subterminally and tip racquet-shaped. 



Bill about as long as to decidedly shorter than head, distinctly 

 decurved, deeper than broad at nostrils; culmen indistinctly to 

 rather distinctly ridged, more or less distinctly convex from base, 

 more strongly decurved terminally, the tip of maxilla usually dis- 

 tinctly produced (subuncinate) ; sides of maxilla next to culmen 

 rounded (flush with general surface) ; gonys much less than twice as 

 long as mandibular rami, broadly rounded, more or less convex and 

 prominent basally, faintly concave terminally, the tip of mandible 

 slightly decurved; tomia very strongly and rather coarsely serrate, 

 except for terminal and basal portions. Nostril mostly exposed, 

 rather large, obliquely broadly oval, in anterior end of nasal fossa. 

 No prefrontal (postnasal) antrorse bristles; rictal bristles distinct 

 but rather small; malar apex with larger and stronger antrorse bris- 

 tles, and feathers of chin with slender, recurved, bristly tips. Head 

 completely feathered, the auricular feathers elongated, rather stiff, 

 forming a conspicuous pomted tuft. Wing rather short, the longest 

 primaries exceeding longest secondaries by about half the length of 

 exposed culmen; fifth, sixth, and seventh primaries longest, the eighth 

 either shorter or longer than fourth, the ninth equal to first or second, 

 the tenth (outermost) a little more than two-thirds as long as nmth. 

 Tail much longer than wing (one-thhd to more than one-half longer), 

 excessively graduated, the middle pan* of rectrices much longer than 

 the next pair, usually with webs denuded for a considerable distance, 

 the tip racquet-shaped; rectrices twelve, the outer pair a little more 



a /3ap(;^ovof, cui vox est gravis. (Vieillot.) 



& "Von Kp0^riXoc=Kpor,TCK6c" (Cabanis and Heine.) 



