ORISMOLOGY. 361 



2. NAVICULAR (Navicularis). When it is shaped like 



a boat. Ex. Cicada, Scaphura. 



3. TELESCOPIFORM ( Telescopiformis). When it con- 



sists of several tubes retractile within each other 

 like the pieces of a telescope. PLATE XVI. FIG. 

 2,3. 



4. ACULEIFORM (Aculeiformis). The ovipositors of 



Hymenopterous insects, which consist of the same 

 parts, with the exception of the poison-bag (lote- 

 rium), whether used as weapons or merely in ovi- 

 position. 



a. EXERTED (Exertus). When the vagina unemployed 



is partly out of the body. Ex. Cleptes. 



b. EXTRICATED (Extricatus). When the valves and 



vagina unemployed are wholly out of the body. 

 Ex. Pimpla. PLATE XVI. FIG. 1. 



c. REFLEXED (Rejlexus). When the ovipositor is turned 



up and lies upon the back of the abdomen. Ex. 

 Leucospis. 



APPENDIX. 



TERMS particularly applicable to LARVAE and PUP^E. 



LARV.E. 



1. SPINNERET (Fusulus). The organ which spins the 



silk. PLATE XXI. FIG. 9. 



2. FORCIPATE LIP (Labium Forcipatum). Mask of 



larvae and pupa? of Libellulina a . PLATE XVI. 

 FIG. 5. a. 



* VOL, III. p. 125. 



