... Geranospiza caerulescens caerulescens Vieillot , 1817 Diagnosis . Differs from nigra and balzarensis in paler coloration and smaller size ; from the former , additionally , in having the pale tail bands and under tail coverts washed ...
... Geranospiza caerulescens livens , subsp . nov . Type.-M. C. Z. , 224,793 , adult , parent of eggs ; Northwestern Mexico : Alamos , State of Sonora , 9 February , 1888 ; M. Abbott Frazar . Subspecific characters . Similar to Geranospiza ...
+ * Geranospiza caerulescens caerulescens ( Vieillot ) Two specimens from Quimarí belong to this form rather than to bal- zarensis , which occurs at Juradó and on the río Salaquí , a western affluent of the lower Atrato . They have been ...