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The Carder Bee Anthidium manicatum has a characteristic nest of felt (of plant hairs) with a stopper of gravel and rubbish. It is infrequent in this Data Set. Pictured are ectopic or erratic cells formed outside of the cavities provided.
Erratic cells do not group as nests and are omitted from the analysis of nest counts in 11.09. Counts of erratic immatures appear on the 'diary' page of the 'information' workbook in 11.07 and should be included in any analysis of cell counts.