Adult female: Resembles adult male, but forehead and under eye pale buff; superciliary stripe darker buff; crown, nape, and sides of neck dark slate-blue; mantle brown, feathers with buffy centers; back brown washed with burnt brown; feathers of rump and upper tail-coverts with terminal black bar edged with buff; wing and tail brownish-black, primaries margined with buff, innermost three secondaries and upper wing-coverts broadly edged with lighter buff, tail tipped with buff, more broadly so on outermost tail feathers, two outermost tail feathers with outer edge buff; two central tail feathers basally dark ochre; ear-coverts buff, tinged with black; chin, throat, and under wing-coverts deep buff; breast, abdomen, and flanks buff, feathers with subterminal blackish bar; under tail buff. Immature: Resembles adult female, but crown, nape, and sides of neck brown; back faintly mottled with buff; tail feathers and primary wing-coverts tipped with white; younger birds may have upper parts margined with pale buff. _Measurements._--Measurements are listed in table 34. _Specimens examined._--Total number, 23 (13 males, 10 females), as follows: Palau Islands, USNM--Koror, 4 (Nov. 6, 14, 26, Dec. 5)--Peleliu, 2 (Aug. 29, 30); AMNH--exact locality not given, 17 (Oct., Nov., Dec.). TABLE 34. MEASUREMENTS OF _Edolisoma tenuirostre_ IN MICRONESIA -------------------+------+----------+---------+-----------+----------- | | | | Exposed | SUBSPECIES | No. | Wing | Tail | culmen | Tarsus -------------------+------+----------+---------+-----------+----------- | | | | | _E. t. monachum_ | 10 | 98 | 80 | 21.0 | 23.0 | | 96-103 | 76-83 | 20.0-22.5 | 22.5-24. | | | | | _E. t. insperatum_ | 35 | 109 | 86 | 23.0 | 24.0 | | 107-112 | 82-91 | 22.0-24.0 | 23.0-25.0 | | | | | -------------------+------+----------+---------+-----------+----------- _Molt._--Molt in this bird appears to take place in the period from August to December. Most of the specimens taken in August, October, November and December were in molt. None was taken in other months. _Food habits._--This bird feeds principally on insects. A female taken on August 29 had in its stomach about one and a half cc. of parts of grasshopper. Marshall (1949:212) records both animal and vegetable matter in the stomach of this bird.