EXTERNAL ANATOMY OF INSECTS. 445 
the lobe, and is moveable, but in the rest of the tribe is 
fixed?. In Phoberus the lower lobe has two spines?. 
In Locusta this lobe has three or four spines or laniary 
teeth, and in Zshna there are six, which, like the claw 
of Cicindela, are moveable*. In others both lobes ter- 
minate in a single spine or claw: this is the case with 
Pazillus*, In Passalus, of which the last is a sub-genus, 
the upper lobe is armed with a single spine, and the 
lower one with two. Those mazille that terminate in 
a single lobe are also often distinguished by the spines or 
teeth with which it is armed: thus in a chafer belonging 
to the Dynastide (Archon‘) it terminates in fwo short 
teeth; in that remarkable Petalocerous genus Hexodon 
in three truncated incisive ones® ; in Dynastes Hercules 
in three acute spines*. Four similar ones arm the apex 
of the mavilla in that tribe of Rutelide which have stri- 
ated elytra; and five that are stout and triquetrous those 
of Melolontha Stigma (Lepidiota K.MS.). Many others 
have szz spines, sometimes arranged in a triple series‘. 
Besides teeth or spines, in some cases the lobes of maz- 
ille terminate in several long and slender lacinze or 
lappets fringed with hairs. At least those of a Leptura 
(L. quadrifasciata) described by De Geer, appear to be 
thus circumstanced. He conjectures that this beetle 
uses its maxille to collect the honey from the flowers *, 
* Clairv. Ent. Helvet. ii. Cicindela. t. xxiv. f. super. 6. for Carabi- 
de, Dytiscidz, his other plates. ° Hor. Entomolog. i. t.1. f. 13. E. 
© Pirate VI. Fic. 6, 12.£". 4 Hor. Entomolog. t. i. f. 3. E. 
© Ibid. f. 4. E. € Linn. Trans. xiv. 567. 
® Oliv. Ins. no. 7. Hexodon. t.i. f. 1. e. 
" Ibid. no. 3. Scarabeus. t. 1. f.1. f. 
* Kirby in Linn. Trans, xiv. 102. ¢, iii. f. 4. d. 
k De Geer y. 417, taiyif- 12. 
