. Ephemera.   Day/fly.

Antennae very short. Mouth without teeth or feel, Stemmata two, very large, above the eyes. Wings erect. Second pair very small, Tail bristled. Short lived.

3. Fhryganea.   Phryganca.

.Antennae longer than the thorax. Mouth without teeth, with four feelers. Stemmata three. Wings in cuinbent, the lower pair plaited.

4. Hemerobius.   Hemerobius.

Antenn longer than the thorax, taper, stretched forwards. Mouth prominent, with two teeth and four feelers. Stemmata wanting. Wings deflected, and not plaited.

5. Myrmeleon.   Anteater.

Antenna clavated, length of the thorax. Wings de elected. Stemmata none. Mouth furnished with jaws. Teeth two, feelers four. Tail of the male furnished with a forceps, consisting of two straightish filaments.

6. Panorpa.   Panorpa.

Antenna longer than the thorax. Snout horny, cylindric, with two feelers. Steinmata three. rrail hi the male, furnished with a claw.

`..r aphidia.   Raplildia.

Antenna as long as the thorax, which is of a cylindric form, and lengthened ut in front, Head depressed, horny