نبذة مختصرة : FIGURES 30–32. SEM micrographs of another hatching first instar of Bombus impatiens about halfway out of chorion, anterior end to right. 30. Rear of body showing disruption of chorion along spiracular line. 31. Close-up of destruction of inner layer of chorion along spiracular line identified by rectangle in figure 30. 32. Close-up of thorax and first abdominal segment demonstrating enlarged first thoracic spiracle compared with two following spiracles.
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