K.Selander, 1952 3 Cymbilophynchus humilis August 22 Pie de la Cuesta, 20ft., Guerrero, Mexico 15 feet in height. Nest similar generally to that of C.rufinucha rufinucha but smaller. Entrance is on the side. [drawing]-entrance]. An adult entered the nest and shortly thereafter reappeared with a wisp of yellow material in its bill. Flew to low branch once then to low herbaceous plants beneath the tree. All the while 4 other were (including juveniles - at least one) foraging in the same tree. (Will investigate this nest more closely in a few days.), It is my impression that worms tend to remain localized. I encountered pairs today in some spots as yesterday. Specimen I have taken suggest that two different age-groups of juveniles are present - one older, having won, adult-like plumage (but with dull brown eyes and small gonads) and the other just out of the nest (pin-feathers on belly). Gonads of adults (and brood-patches of adult ??) not indicative of breeding at present time, however. Songs suggest breeding activity also. August 23 Took 4 juveniles and 1 adult. One juvenile had definite brownish cast to feet & legs. Birds not very active today for some reason. Became rather silent after 10:00 A.M - but continued to feed silently. Located a flock (four or five) near the nest I located yesterday. Shot 2 juveniles here.