446 EXTERNAL ANATOMY OF INSECTS. 



fixed a . In PJioberas MacLeay the lower lobe has two 

 spines b . In Locusta this lobe has three or four spines 

 or laniary teeth, and in JEsk?ia there are six, which, like 

 the claw of Cicindela, are moveable c . In others both 

 lobes terminate in a single spine or claw : this is the case 

 with Paxillus MacLeay d . In Passalus, nearly related 

 to the last genus, the upper lobe is armed with a single 

 spine, and the lower one with two e . Those maxillce that 

 terminate in a single lobe are also often distinguished by 

 the spines or teeth with which it is armed ; thus in a 

 nondescript chafer belonging to the Dynastidce (Ar- 

 c/ion K. MS.) it terminates in two short teeth ; in that re- 

 markable Petalocerous genus Hexodon Oliv. in three trun- 

 cated incisive ones f ; in Dynastes Hercules in three acute 

 spines s . Four similar ones arm the apex of the maxilla 

 in that tribe of Rutelidce which have striated elytra ; and 

 Jive that are stout and triquetrous those of Melolontha 

 Stigma F. Many others have six spines, sometimes ar- 

 ranged in a triple series K Besides teeth or spines, in 

 some cases the lobes of maxillce terminate in several lono- 

 and slender lacinice or lappets fringed with hairs. At 

 least those of a Leptura (L. quadrifasciata L.) described 

 by De Geer, appear to be thus circumstanced. He con- 

 jectures that this beetle uses its maxillce to collect the 

 honey from the flowers '. 



a Clairv. Eni. Helvet. ii. Cicindela. t. xxiv./. super, b. for Carabi- 

 diB, Dytiscidoe, his other plates. 



b Hor. Entomolog. i. t. ii./. 13. E. c Plate VI. Fig. 6, 12. £'". 



d Hor. Entomolog. t. \.f. 3. E. e Ibid./. 4. E. 



f Oliv. Ins. no. 7. Hexodon. t. i.f. 1. e. 



s Ibid. no. 3. Scarabmus. t. \.f. 1. f. 



k Kirby in Linn. Trans, xiv. 102. t. m. f. 4. d. 



i De Geer v. 417. t. iv.f. 12. 



