158 INTERNAL ANATOMY OF INSECTS. 



ceps, which perhaps introduces it a . The Ovipositor of 

 Prionus coriarius differs from that of Callidium viola- 

 ceurn, and many Capricorns before described b : it consists 

 merely of a long bivalve piece ending in a kind of for- 

 ceps, and hollowed above into a channel for the passage 

 of the eggs c . 



In the Orthoptera the instrument of oviposition is 

 more simple ; in Locusta consisting merely of four ro- 

 bust three-sided pieces, two above and two below, the 

 former pair at the end curving upwards and the latter 

 downwards d , these pieces seem calculated when they 

 have entered the earth to enlarge the burrow, and the 

 animal appears able to separate them very widely from 

 each other e . The ovipositor ofAcrida viridissima, which 

 like that of many Hymenopterous insects forms a kind 

 of appendage or tail to the body, has been described 

 both by De Geer and Latreille as consisting of two valves 

 only f ; but in reality it consists of six, two upper and 

 four lower, as you may ascertain by means of a pin or 

 the point of a penknife, which will readily separate them. 

 This is confirmed by a figure of StolPs of a species which 

 seems to connect Conocephalus with Gryllus. In this 

 the ovipositor is considerably longer than the body of 

 the animal, and is composed of six distinct pieces ; viz. 

 two external ones stouter than the rest, and within these 

 four others finer than a hair and convolute at the apex*. 

 There is a considerable variety in the shape of the ovi- 

 positors of the Acridtf and the cognate genera: thus h? 



a De Geer iv. 143. t. v./. 15. 



b VOL. I. p. 357. c De Geerv. 62. t. iii./. 12. 



i PLATE XV. FIG. 18. * Stoll Sauterel. t. xxii. b./. 87, &c. 



f De Geer iii. 418. t. xxi./. 10, 1 1 . Latr, Gen, Crust, et Ins. iii. 98. 



K Stoll ubi svpr. t. xiii. a./. 51. 



