COLUMBIDJE — ZEN AIDING : GROUND DOVES. 



567 



Onter primary normal. 



Tail longer than wing, double-rounded Scardafella 199 



Tail about e(iual to wing. Tarsus not shorter than middle toe and claw Geotrygon 200 



Tail shorter than wing. Tarsus sliorter than middle toe and claw. 



No blue-black spot nor metallic lustre on head or neck Chamcepelia 198 



A blue-black spot and metallic lustre on head or neck 



Black spots and no white patch on wing Zenaida 196 



White patch and no black spots on wing Mtlopelia 197 



194. ENGY^TILA. (Gr. e'yyvs, cggus, narrow, straitenetl ; irriXov, ptilon, feather ; alluding to the 

 outer primary.) PiN-wiNa Doves. First primary abruptly emarginate, attenuate and linear 

 near the end. Wings of moderate length ; 8d and 4th primaries longest ; first shorter than 

 7th. Tail much shorter than the wings, rounded, of 12 broad feathers. Tarsus entirely naked, 

 equalling or rather exceeding the middle toe and claw. Lateral toes nearly equal, the ends of 

 their claws reaching about opposite the base of the middle claw. Hind toe shortest of all, but 

 perfectly incumbent. Bill small and slender, much shorter than the head. A considerable 



Fig. 391. — Details of Engi/ptila albi/rons; head and foot nat. 

 (Ad nat. del. K. Ridgway.) 



wing and tail reduced, 



naked space about the eye, thence extending in a narrow line to the bill. Size medium or 

 rather small. Body full and stout. Coloration subdued, but hind-head and neck iridescent. 

 No metallic spots on wings or head. Lining of wings chestnut. (Only N. Am. genus with 

 attenuate outer primary.) 

 542. E. al'bifrons. (Lat. aZftws, white ; /rows, forehead. Fig. 391.) White-fronted Dove. ^, 

 adult: Upper parts brownish-olive, with silky lustre (much as in Coccygus americanus for 

 example). Hind-head, nape, and back and sides of neck with coppery-purplish iridescence. 

 Top of the head of a bluish or glaucous ''bloom,'' fading to creamy- white on the forehead. Under 

 parts dull white or whitish, more or less shaded with olive-brown on the sides, deepening on the 

 fore-breast and jugulum to pale vinaceous; belly, crissum, and chin quite purely white. Wing- 

 coverts and inner quills like the back, and without metaUic spots ; other larger remiges 

 slaty-blackish, with very narrow pale edging toward the end. Under wing-coverts and axilla- 

 ries bright chestnut. Two middle tail-feathers like the back ; others slaty-black, tipped with 

 white in decreasing amount from the outer ones inward, the largest white tips about half an 

 inch in extent. Bill black. Feet cannine-red. Iris yellow. Bare skin around eye red and 



