Publisher's Synopsis
Excerpt from Diptera Fam. Blepharoceridae
Each midge on emerging forced its way out through a transverse rent between the thorax and abdomen. It then worked its body out slowly, and in spite of the swift current held it vertical. The water covering the patch of pupa varied from one-fourth to one-half inch in depth. In the shallower parts the adult had trouble in working its way to the surface, still clinging to the pupa-skin by its very long hind legs. -'hile still anchored by its legs, the midge rests on the surface of the water for one or two seconds and unfolds its wings; then freeing its legs it takes ?ight. The adults emerging from the deeper water were swept away by the current before they had a chance to take wing. The time required for a midge to work its way out of the pupa-skin varied from three to five minutes. I)
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