OUISMOLOGY. 267 



somewhat resembling cork a . The galls of some 

 species of Cynips when mature approach to this 

 substance. 



9. SPONGIGSE (Spongiosa}. A soft elastic substance re- 

 sembling sponge. Ex. The Pulvilli of Thanasi- 

 musy BuprestiS) &c. 



10. LIGNEOUS (Lignosa). A hard unelastic substance 



like wood. Ex. Galls of some species of Cynips. 



11. CARNOSE (Carnosa). A soft, Jleshy substance. 



Ex. Caterpillars and Grubs. 



12. TUBULOSE (Tubulosa). When the interior is hoi- 



low or empty. 



13. SOLID (Solida}. When the interior is full. 



II. RESISTANCE. 



1. RIGID (Rigida). Hard, which does not bend or yield 



to pressure. Ex. The weevils (Rhyncophora}. 



2. FLEXILE (Flexilis). Which easily bends, or yields to 



pressure without breaking. Ex. Elytra of Tele- 

 phorus. 



3. SOFT (Mollis). Flexile and retaining the marks of 



pressure. Ex. Elytra of Meloe. 



III. DENSITY. 



1. FOLIACEOUS (Foliaced). Very thin and depressed, 



scarcely thicker than a leaf. Ex. Aradus corticalis 

 and Coreus paradoxus. 



2. DEPRESSED (Depressa}. When the vertical section 



is shorter than the transverse. Ex. Trogosita man- 

 ritanica. 



* We use this term because subcrosa is employed in a quite differ- 

 ent sense. 



