BIRDS OF NORTH AND MIDDLE AMERICA. 467 



Guatemala (Plains of Zacapa; El Rancho, Zacapa; Rio Montagua; 

 "Vallej'^ of Rio Montagua from Guastatoya and Magdalena to 

 Gualan"). 



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

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

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

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

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

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

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



[Momotus] castaneiceps Gray, Hand-list, i, 1869, 80, no. 940. — ScLATERand Salvin, 

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



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



Genus UROSPATHA Salvadori. 



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

 Prionites martii Spix.) 



Large Momotid^ (length about 420-525 mm.) resembling Momotus 

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

 coarsely serrate tomia, the serrations extending nearer to tip of bill. 



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

 deeper than wide at nostrils; culmen distinctly decurved from base 

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

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

 rounded, slightly convex and prominent basally, faintly concave ter- 

 minally, the tip of mandible sUghtly decurved; serrations of tomia 

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

 tip of bill. Nostril completely exposed, large, obliquely broadly 

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

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

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

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

 auricular feathers elongated, rather stiff, producing a conspicuous 

 tuft on each side of head ; middle of f oreneck, or upper chest, %vith a 

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

 primaries exceedmg longest secondaries by less than haK the length 

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

 about equal to fourth, the ninth about equal to or sUghtly shorter 

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

 ninth. Tail more than haK as long again as wing, excessively gradu- 

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

 as next pair, their webs usually denuded subterminally, the tip 

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

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

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



