A. Side-covers (Epipleuræ).
1. Marginal (Marginales). When they are only an inflexed continuation of the margin.—Ex. Buprestis.
2. Discoidal (Discoidales). When they are a process from the disk of the under surface of the elytra.—Ex. Lampyris, Cossyphus, Cassida, Notoclea[1105].
ζ. tegmina.
1. Fenestrella (Fenestrella). A transparent eye-like spot in the Anal Area of the Tegmina of Acrida ♂[1106].
2. Convolvent (Convolventia). When the Anal Area is horizontal, incumbent on the back of the insect, and forms a right angle with the rest of the tegmen, which is vertical and covers the sides.—Ex. Locusta. N.B. In this case the Anal Area of one Tegmen covers that of the other.
3. Aliform (Aliformia). When their substance approaches to membrane, and they nearly resemble Wings.—Ex. Most Homopterous Hemiptera.
η. hemelytra.
1. Obtected (Obtecta). When the Hemelytra are covered by a scutelliform mesothorax.—Ex. Scutellera.
2. Detected (Detecta). When they are not so covered.—Ex. Most Heteropterous Hemiptera.
θ. wings (Alæ).
A. Denomination.
1. Anterior (Anticæ). The fore or upper wings.
a. Superior (Superiores). The anterior wings are so denominated if when at rest they are placed upon the posterior wings.—Ex. Hymenoptera.
b. Primary (Primores). The anterior wings are so denominated if when at rest they are not placed upon the posterior.—Ex. Lepidoptera diurna, Libellulina.
2. Posterior (Posticæ). The hind or lower wings.
a. Inferior (Inferiores). The posterior wings are so denominated if the anterior wings, when at rest, are placed upon them.
b. Secondary (Secundariæ). The posterior wings are so denominated if the superior wings, when at rest, are not placed upon them.—Ex. Lepidoptera diurna, Libellulina.
B. Magnitude.