BIRDS OF NORTH AND MIDDLE AMERICA. 605 



Genus ERIBATES Ridg>A^ay. 



Enhatesa Ridgway, Proc. U. S. Nat. Mus., xvi, no. 955, Oct. 25, 1893, 606. 

 (Type, Myiobius magnirostris Gray.) 



Similar to Myiarclius, but tarsus relatively much longer (a little 

 less than one-third as long as wing, about equal to length of bill from 

 rictus), lateral outlines of l)ill not contracted terminally, and tenth 

 (outermost) primary much shorter (shorter than secondaries). 



Bill nearly as long as head, narrowly triangular or wedge-shaped in 

 vertical profile, its width at frontal antitie equal to about half the 

 length of exposed culmen and decidedly less than twice its depth at 

 same point, its lateral outlines straight to near tip of the rather 

 obtusely pointed maxilla; exposed culmen equal to or slightly 

 longer than middle toe with claw, distinctly ridged, straight to near 

 tip where rather abruptly decurved, the tip of maxilla minutely and 

 rather obtusely uncinate; gonys much longer than mandibular rami, 

 faintl}' convex; maxillary tomium nearly straight, minutely notched 

 subterminally. Nostril exposed, broadly oval or nearly circular, 

 midway between culmen and tomium, opening laterally. Rictal 

 bristles distinct but slender, the feathers of chin with indistinct, those 

 of malar and frontal antise wdth distinct, bristly points. Wing mod- 

 erate, much rounded, the longest primaries exceeding distal second- 

 aries by slightly less than length of exposed culmen; sixth, seventh, 

 and eighth primaries longest, ninth equal to fifth, tenth (outermost) 

 shorter than secondaries. Tail about nine-tenths as long as wing, 

 slightly double-rounded, the rectrices moderately broad, with broadly 

 rounded tip. Tarsus long and slender, twice as long as middle toe 

 without claw, a little less than one-third as long as wing, its scutella- 

 tion typically exaspidean but wdth a separate series of longitudinal 

 scutella along upper posterior margin of outer side of tarsus, the 

 acrotarsial divisions very distinct ; basal phalanx of middle toe united 

 to outer toe for nearly its whole length, to inner toe for about half its 

 length; outer toe, without claw, reaching to middle of subterminal 

 phalanx of middle toe, the inner toe distinctly shorter; hallux shorter 

 than inner toe but distinctly stouter, its claw about as long as the 

 digit; all the claws rather long, moderately curved, sharp. 



Coloration. — Above plain olive, browner on pileum, the wings and 

 tail dusky grayish brown with paler edgings (these rufescent on inner 

 webs of inner rectrices) , the middle and greater wing-coverts broadly 

 tipped with light brownish gray; beneath plain pale gray anteriorly, 

 pale yellow posteriorly. 



Nidijication. — Nest in holes of arborescent cacti, composed of small 

 twigs, fine grass stems, hair, feathers, etc. Eggs unknown. 



Range. — Galapagos Archipelago. (Monot3^ic.) 



a'Epi, intensive participle; fidyrfi, one that treads. 



