13 Holmes, R 1961 Catalog 24 July Barrow, Alaska 1221 ♂ Erolia bairdi - T=1.5mm - light fat 38.4 crown O->D ; dorsum O->C->D ; rump O; throat O->E breast O->C ->D ; brood patch refatherns with A. scapulars O->C->D . Coll. on B.R. 25 July Barrow, Alaska T-6 1222 ♂ Juv. Erolia bairdi - T=1mm . light fat 28.5 B.R. { 1223 ♂ " " . . . . 31.2 T-6 1224 ♀ " Ereunetes pusillus - ova <1mm - light fat 23.6 B.R. { 1225 ♀ J. Erolia alpina - ova <1mm - light fat 36.9 26 July Barrow, Alaska 1226 ♂ Erolia alpina - T=1.5x1mm - no fat 55.3 crown O->C->D; dorsum O->C ; rump O->D ; up-t-cov. O->c; Throat-O ; breast O ->c; brood patch refatherng with C. wing + tail molt. 1227 ♂ Erolia alpina - T-3x1mm - no fat 50.9 crown O->E->D ; dorsum O->B; rump O->c ; up. t.-cov. O->A ; throat O-> ; breast O ->B ; under tail cov. O->C ; brood pata refathering with C . wing molt - tail molt complete ? 1228 ♀ Erolia alpina - ova <1mm - no fat 37.8 crown O->c ; dorsum O-A; rump O->C ; up-t-cov C-D throat O-A ; breast O->B->C ; und. t-cov. O->C; b. p- with C+D feathers. Wing + tail molt. 1229 ♂ Erolia alpina - T=2x1mm - no fat 53.5 crown O->D ; dorsum O -> D ->E ; rump O->D up. t. cov <^>E; throat O ->B ->D; breast O->@ ->D und-t-cov B ->D . B.P. refatherning wing molt - tail molt came.