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BULLETIN 50, UNITED STATES NATIONAL MUSEUM.

of interscapular area with more or less of white at base; lateral rectrices sometimes narrowly tipped with white; bare skin of head pale blue (azure or campanula blue back of eyes) ; bill, tarsi, feet, and claws plumbeous; iris dark red;[1] length (skins), 147-170 (160); wing, 76.5-81.5 (79); tail, 58-64 (60.9); culmen 20-23 (21.7); tarsus, 29-32 (31.1); middle toe, 18.5-20.5 (19.4).[2]

Immature male (= Myrmelastes lawrencii Salvin and Godman). — Similar to the adult male but entire pileum feathered (only the loral and orbital regions being naked) and greater wing-coverts wholly black.

Adult female. — Pileum and hindneck rufescent brown (nearly mummy brown), somewhat more rufescent anteriorly and laterally; back, scapulars, and rump plain deep olive, the upper tail-coverts more rufescent; tail dark warm-sepia brown; lesser wing-coverts and margin of wing deep tawny-ochraceous, the former with concealed base of feathers dusky; middle coverts black, broadly and sharply tipped with tawny-ochraceous; greater coverts bistre brown, passing into black subterminally, their tips sharply and rather broadly tawny- ochraceous; remiges russet-brown or vandyke brown, the edges of outermost primaries lighter (more russet); sides of head and neck and general color of under parts, including under wing-coverts, plain bright cinnamon-rufous or rufous-tawny, somewhat paler on abdomen and passing into olive-tawny on flanks and under tail-coverts; "naked skin of head pale blue (azure back of eye) ; bill, tarsi, feet, and claws plumbeous; iris dark red;"[3] length (skins), 151-163 (156); wing, 71-79 (75.9); tail, 59-60.5 (59.4); culmen, 19.5-21.5 (21.1); tarsus, 28.5-30.5 (29.6); middle toe, 19-19.5 (19.1).[4]

Young male. — Similar to the adult female, but pileum and hindneck duller and less rufescent brown, middle and greater wing-coverts

without ochraceous or tawny tips, and the tawny-ochraceous which


  1. C. W. Richmond.
  2. Ten specimens.
  3. C. W. Richmond, manuscript.
  4. Six specimens.
    Locality. Wing. Tail. Culmen. Tarsus. Middle
    toe.
    males.
    Six adult males from Costa Rica 76.2 61.1 21.8 31.6 19.8
    Three adult males from Nicaragua 78.8 60.8 21.7 30.8 19.3
    One adult male from Guatemala 76.5 60 21.5 29 18.5
    females.
    Three adult females from Costa Rica 75.7 59.5 20.8 30 19.2
    One adult female from Nicaragua 76 59 21.5 30.5 19
    One adult female from Honduras 76.5 59 21 28.5 19
    One adult female from Guatemala 76 60 21.5 29 19