451 EXTERNAL ANATOMY OF INSECTS. 



it terminates in three equal lobes a ; in Stomis and Geo- 

 trupes in three unequal ones, the intermediate being very 

 short b ; in Carabus, in three short teeth c ; in Pogonopho- 

 rus it represents a trident d ; in the wasp it is bifid, each 

 lobe being tipped with a callosity e ; in Melolontha Stigma 

 it is bipartite t '; in Elaphrns, the analogue of the tiger- 

 beetles, it terminates in a single tooth or point; in the 

 aquatic beetles, Dytiscus L., it is quadrangular and with- 

 out teeth s ; in some Ichneumonidce it is concavo-convex, 

 and forms a demitube; and in others it is nearly cylin- 

 drical h . 



In many insects it has no kairs, but in the Predaceous 

 beetles it generally terminates in a couple of bristles '. 

 In the hive- humble- and other bees, it is extremely 

 hairy k ; a circumstance which probably enables it more 

 effectually to despoil the flowers of their nectar. In Geo- 

 trupes stercorarius, the common dungchafer, and Melo- 

 lontha Stigma lately mentioned, the lobes of the tongue 

 are fringed with incurved hairs *; and in JEshna it is 

 hairy on the upper side, each hair or bristle crowning a 

 minute tubercle. In many cases the tongue is attended, 

 and sometimes sheathed at the base, by two usually mem- 

 branous appendages : — these the learned Illiger has deno- 



. a Kirby Moiu Ap. Angl. i. t. xiv. (1) 2. b. 



h Plate XXVI. Fig. 24. e'. c Clairv. ubi supr. t. xx. c. 



d Plate XXVI. Fig. 28. e. 



e Kirby ubi supr. fig. (8) 1. c c. The lateral pieces in the tongue 

 in -Vespa {Ibid, c c.) have been regarded as lobes of it, but they are 

 rather Paraglossce. 



f Plate XXVI. Fig. 29. e'. e Clairv. ubi supr. t. xxx. c. 



» Kirby ubi supr. no. 2./. 1, 3. '' Plate XXVI. Fig. 24. b. 



k Kirby ubi supr. 1. x. Apis. e. 2. §./. 5. t. xii. neut.f. 2, 3. t. xiii. 

 /. 1. h. l Plate XXVI. Fig. 26, 29. 



