476 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



ELECTRON CARINATUS VIRIDIS Ridgway. 



COSTA BICAK KEEL-BII.I.ED MOTMOT. 



Similar to E. c. carinatus but general color of under parts duU greeUj 

 tinged on foreneck, chest, and breast with olive-green, but ■without 

 the tawny oil-green suffusion always present and often conspicuous 

 in E. c. carinatus, the posterior under parts light bluish green; upper 

 parts clearer (less yellowish) green; bill relatively broader and more 

 strongly arched. 



Adult male. — ^Length (skin), 310; wing, 116; tail, 180; exposed 

 culmen, 37; tarsus, 17; middle toe, 14." 



Northwestern Costa Rica (San Carlos; La Vijagua). 



Prvmirhynchus carmatus (not Prionites carinatus Du Bus) Boucakd, Proc. Zool. 



Soc. Loud., 1878, 49 (San Carlos, Costa Rica). — ^Zelbd6n, Anal. Mns. Nac. 



Costa Eica, i, 1887, 119 (Costa Bica). 

 Prionornis carinatus Salvin and Godman, Biol. Centr.-Am., Aves, ii, 1895, 468, 



part (San Carlos, Costa Rica). — ^Bangs, Proc. Biol. Soc. Wash., xxii, 1909, 



32 (La Vijagua, Costa Eica). — Carriker, Ann. Carnegie Mus., vi, 1910, 496 



(Costa Eica). 

 Electron carvnatus viridis Ridgwat, Proc. Biol. Soc. Wash., xxv, May 4, 1912, 89 



(La Vijagua, n. w. Costa Rica; coll. E. A. and O. Bangs). 



Genus EUMOMOTA Selater. 



Eumomota Sclatbr, Proc. Zool. Soc. Lond., 1857, 257. (Type, Prionites super- 



dliosus Sandbach.) 

 Eumomotus (emendation) Murie, Ibis, Oct., 1872, 407. 

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



Prionites superdliosus Sandbach.) 



Medium-sized Momotidae (length about 343-386 mm.) resembling 

 the genus Electron but with bill narrower (width at nostrils much less 

 than distance from nostril to tip of maxilla), less depressed, and less 

 concave next to the rounded (not flattened) cuhnenal ridge; tarsus 

 longer than middle toe with claw; middle rectrices nearly twice as 

 long as next pair, their webs denuded for a distance equal to more 

 than haH the length of the second pair of rectrices, the large racquet- 

 shaped tip much longer than culmen; conspicuous, brightly colored 

 (turquoise blue) superciliary tufts, and thorax with a black patch 

 margined laterally with bright turquoise blue narrow feathers. 



BUI about as long as head, distinctly decurved terminally, broad 

 and moderately depressed, its width at nostrils equal to much less 

 than half but decidedly more than one-third the distance from nostril 

 to tip of maxilla, slightly but decidedly greater than its height at 

 same point; culmen conspicuously carinate, but the ridge broad and 

 rounded, distinctly but not abruptly elevated above the depressed 



" One specimen (the type). 



b Von imiSTj (spatel) und ^kpto (tragen). (Cabanis and Heine.) 



