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In this microscopic image of a section through the brain of Centris pallida, the cell nuclei of the neurons are stained blue; shown in red is the extensive "wiring" connecting the neurons, a North American solitary bee, Wulfila Gronenberg A microscopic image of a section through the brain of Centris pallida, a North American solitary bee with no officially accepted common name. The cell nuclei of the neurons are stained blue; shown in red is the extensive "wiring" connecting the neurons, some of which are organized into distinct brain centers performing specific tasks. The image covers about one thousandth of a square inch.