ORISMOLOGY. 345 



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 (Secundarice}. 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 (Iri&qwles). When they are not of equal 



length. Ex. Hymenoptera. 



C. Complication. 



5. PLANE (Planae}. Flat wings that are neither plica- 



tile nor tumid. Ex. Apis. 



6. TUMID (Tumidfs). 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 (Duplicate?). When they are folded 



transversely. Ex. Coleoptera. 



9. CONVOLUTE (Convolute). When the wings so en- 



velope the body as to give it a cylindrical form. 

 Ex. Crambus. 



