ORISMOLOGY. S^7 1 
and narrowing gradually downwards. Plate X. 
Fig. 11. 
16. Acin acicate( Aci?iacicata). Falchion-shaped. Curv- 
ed with the apex truncate, and growing gradually 
wider towards the end. — Ex. Abdomen of Ophion, 
Fcenus, and other IchneumonicUe \ 
17. Lunulate (Lunidata). Crescent-shaped. Curved 
with both ends acute, like the moon in her first 
quarter. — Ex. Last joint of the labial palpi of 
Oxyporus. Plate XIII. Fig. 4. a. 
18. Falcate (Falcata). Sickle-shaped. Curved with 
the apex acute. — Ex. Ovipositor of Acrida varia. 
Antenna of Atractocerus. Plate XI. Fig. 8. 
19. Linear (Linearis). Narrow and of the same width 
throughout. — Ex. Wiiigs of Pterophorus monodac- 
tylns. 
20. Arcuate (Arcuata). Linear and bent like a bow. 
— Ex. Rostrum of Balaninus Nucum. Plate 
XIII. Fig. 12. 
21. Cultrate (Cultrata). Coulter-shaped. Straight on 
one side and curved on the other. — Ex. Ovipositor 
of some Saw-flies. Under-isoing of many Ich- 
neumonidce. 
22. Spatulate (Spatidata). Spatula-shaped. Broader 
and rounded at the apex, linear and narrow at 
the base. — Ex. Abdomen of Ichneumon amictorius 
Panz. 
2S. Clepsydrate (Clepsydrata). Hour-glass-shaped. 
* The term falcate has usually been applied to signify this figure, 
as well as that to which we have restricted it ; but as the truncate 
and sharp extremity forms a striking difference, we thought it best 
to invent a new term. 
