OIUSMOLOGY. 3-t5 
upon the posterior. — Ex. Lepidoptera diurna, 
Libellulina. 
2. Posterior (Postica?). 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 (Secundaria). The posterior wings are 
so denominated if the superior wings, when at rest, 
are not placed upon them. — Ex. Lepidoptera 
diurna, Libellulina. 
B. Magnitude. 
3. Equal (JEquales). When the four wings are of 
equal length. — Ex. Libellulina. 
4. Unequal (Incequales). When they are not of equal 
length. — Ex. Hymenoptera. 
C. Complication. 
5. Plane (Plance). Flat wings that are neither plica- 
tile nor tumid. — Ex. Apis. 
6. Tumid (Tumida). When the membrane between 
the nervures that form an areolet is bigger than 
the areolet, which gives it convexity. — :Ex. The 
Serrifera or saw-flies. N.B. The object of this 
structure is to expose a larger surface to the action 
of the air. 
7. Plicatile (Plicatiles). When the wings at rest are 
folded in one or more longitudinal plaits. — Ex. 
Vespa L. 
8. Duplicatile (Duplicated). When they are folded 
transversely. — Ex. Coleoptera. 
9. Convolute (Convolutcc). When the wings so en- 
velope the body as to give it a cylindrical form. — 
Ex. Crambus. 
