May Flies And Midges of New York Third Report On Aquatic Insects a Study Condu

Cover May Flies And Midges of New York Third Report On Aquatic Insects a Study Condu
May Flies And Midges of New York Third Report On Aquatic Insects a Study Condu
James George Needham
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1846. (P1. 36, fig. 7, and pl, 32, fig. 4) Small species, distinguished by the absence of the anal angle of the wing. Head round, proboscis short, palpi incurved, four- MAY FLIES AND MIDGES OP NEW 163 jointed, the last joint elongated. Antennae of the male 10- jointed, the first joint thick and disk-like, the following eight egg- shaped, the last one thicker and longer than the others, all with long hairs, the last one verticillate ; antennae of the female 6-jointed, the first one thick and dis...k-like, the following four ellipsoidal, the last one somewhat elongate, all with short hairs. Eyes round, ocelli wanting. Mesothorax greatly arched, prolonged over the head, without transverse suture; scutellum small; metathorax much arched. The 8- jointed abdomen is narrow and long. Legs elongated; slender; the posterior pair of tibiae somewhat thickened, spurred; metatarsi elongated; claws and pulvilli very small. Wings in outline club-shaped, bare, and bent down; anal angle wanting; anterior margin thickened.

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