Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 835
Portion of a large Trachea of Dytiscus, withsome of its principal branches. … Spuacle of Common Fly. is well seen in the spiracle of Tipula (Crane-fly).—In those aquaticLarvae which breathe air, we often find one of the spiracles of thelast segment of the abdomen prolonged into a tube, the mouth ofwhich remains at the surface while the body is immersed; thelarvae of the Gnat…
Microscopy · Biology
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