BIBDS OF NORTH AND MIDDLE AMEKICA. 467 



Guatemala (Plains of Zacapa; El Rancho, Zacapa; Rio Mont&gua; 

 'Valley of Rio Montagua from Guastatoya and Magdalena to 

 Jual&n"). 



Momotus castanekeps Gould, Proc. Zool. Soc. Lond., xxii, 1854, 154 (Guatemala; 

 coll. J. Gould). — ScLATBR, Proc. Zool. Soc. Lond., 1857, 254 (monogr.). — 

 Salvin, Ibis, 1861, 354 (Plain of Zacapa, Guatemala; crit.). — Shakpb, Cat. 

 Birds Brit. Mus., xvii, 1892, 329 (Bio Montagua, Guatemala). — Salvin and 

 GoDMAN, Biol. Centr.-Am., Aves, ii, 1895, 461 (Valley of Rio Montagua from 

 Guastatoya and Magdalena to Gualan). — Deaeboen, Pub. 125, Field Mus. 

 N. H., 1907, 89 (El Rancho, Zacapa, Guatemala). 



[Momotus] castanekeps Geat, Hand-Hat, i, 1869, 80, no. 940. — Sclateb and Salvin, 

 Nom. Av. Neotr., 1873, 102.— Shaepb, Hand-list, ii, 1900, 77. 



C[rybelus] castaneiceps Cabanis and Heine, Mus. Hein., ii, 1859, 112, footnote. 



Genus UROSPATHA Salvador!. 



Urospatha Salvadoei, Atti Roy. Accad. Sci. Torino, iv, Dec, 1868, 179. (Type, 

 Prionites martii Spix. ) 



Large Momotidae Qength about 420-525 mm.) resembling Momotus 

 )ut with only ten rectrices (these relatively narrower) and more 

 soarsely serrate tomia, the serrations extending nearer to tip of biU. 



Bill about as long as head, distinctly decurved terminally, much 

 leeper than wide at nostrils; cuhnen distinctly decurved from base 

 [more strongly so terminally), narrowly rounded or very indistinctly 

 idged ; gonys less than twice as long as mandibular rami, broadly 

 •ounded, slightly convex and prominent basally, faintly concave ter- 

 ninaUy, the tip of mandible slightly decurved; serrations of tomia 

 arge and very prominent (except basally), extending to very near 

 ;ip of biU. Nostril completely exposed, large, obliquely broadly 

 )val, in anterior end of nasal fossa. No prefrontal (postnasal) 

 mtrorse bristles; rictal bristles obvious but small and weak, those 

 )f malar apex larger, but not strong, the feathers of chin with small, 

 rery slender, recurved bristly tips. Head completely feathered, the 

 luricular feathers elongated, rather stiff, producing a conspicuous 

 ;uf t on each side of head ; middle of foreneck, or upper chest, with a 

 larrow tuft of elongated feathers. Wing rather short, the longest 

 )rimaries exceeding longest secondaries by less than half the length 

 )f exposed cuhnen; sixth and seventh primaries longest, the eighth 

 ibout equal to fourth, the ninth about equal to or slightly shorter 

 ihan second, the tenth (outermost) nearly three-fourths as long as 

 linth. Tail more than half as long again as wing, excessively gradu- 

 ated, the middle pair of rectrices much more than half as long again 

 IS next pair, their webs usually denuded subterminaUy, the tip 

 acquet-shaped; rectrices ten, the outer pair nearly three-fourths as 

 ong as the next pair. Tarsus decidedly longer than middle toe with 

 law, nearly as long as distance from nostril to tip of maxilla, stout. 



