TERMINI. 11 j 



4nd looks upon them as designed merely for or- 

 nament (w). Reaumur and De Geer term them 

 demi-fourreaux {x) . Linneus, in his character of 

 Ichneumon, calls them valves of the vagina of the 

 aculeus. They are the covers Of the genuine 



vaginti. 



Vagina; This is the part that generally goes 

 under the name of the aculeus ; but in all Hy-^ 

 menopterous insects^ even Ichneumon^, it is no more 

 than the sheath or quiver of the real aculei, as 

 Swammerdam^ Reaumur, and De Geer properly 

 call it(2/). 



Spicula. This term I have borrowed from Vir- 

 gil (z), io express the true aculei. These in 

 Swammerdam are denominated " the shanks of the 

 sting (a)r Reaumur and De Geer call them " des 

 aiguillons fbj." 



Retinaculum,- This part of the spicida, which 

 was first pointed out to my observation by my in- 



(m) Swamm. Explan. Tab. p. 20, Tab. 18, fig. 2. qq. 



{x) Ubi sup, Mem. 7. p, 376. Tab, 29. fig, 1—3,7,9. 10. cc. 

 DeGeer, ubi sup. p. 1129. Tab. 25. fig, 15, ff, &c, 



(3/) Swamm. ubi sup, p. 20. Tab. 18, fig, 3, a, I, c. Reaum, 

 6bi sup. p. 376-7. Tab. 29, fig. 4—6./, &c. De Geer, ubi sup, 

 p. 1129. Tab. 25. fig. 15, a. 



(x) Illis ira modum supra est, Isesseque venenum 

 Morslbus inspirant, et spicula caeca relinquunt 

 Afl[ixae venis, Georg. iv. 1. 236. 



(fl) Swamm. ubi sup, p. 20, 21. Tab. 18. fig. 3. dd, &c. 

 (i) Reaum. ubi sup, fig. 5. e, g. De Geer^ ubi sup. cc. 



genious 



