INSECTS. 



[ 363 ] 



INSECTS. 



an involute, spiral tongue, composed of 

 the elongated maxillae; metamorphosis 

 complete (fig. 368). 



Fig. 368. 



Danais Plexippe. 

 Nat. size. 



Ord. 9. Neuroptera (Lace-wings, Dragon- 

 flies, &c.). Wings four, membranous, ge- 

 nerally pellucid, reticulated, naked, very 

 often equal; mouth not suctorial, but 

 mostly made for manducation ; mandibles 

 in some obsolete ; females never furnished 

 with a sting, and but rarely with a borer or 

 exserted oviduct; metamorphosis mostly 

 incomplete, in some complete (fig. 369). 



Fig. 369. 



metamorphosis with few exceptions in- 

 complete (fig. 370). 



Fig. 370. 



Reduvius tuberculatus. 

 Nat. size. 



Ore?. 11. Orthoptera (Grasshoppers, Crickets, 

 &c.). Wings four, the upper coriaceous, 

 veiny, the inferior membranous, longitu- 

 dinally plaited like a fan ; mouth serving 

 for manducation, with strong mandibles ; 

 maxillae furnished with a cylindrical hel- 

 met ; metamorphosis incomplete. 



Ord. 12. Coleoptera (Beetles). Wings four, 

 Fig. 371. 



Libellula depressa. 

 Nat. size. 



Ord. 10. Hemiptera (Bugs, &c.). Wings four, 

 all membranous, or the anterior ones coria- 

 ceous at the base, and thicker ; mouth with 

 a jointed rostrum (labium), ensheathing 

 setae (mandibles and maxillae); palpi none; 



Cerambyx eedilis. 

 Nat. size. 



anterior hard, coriaceous or horny (elytra), 

 covering the posterior, which are membran- 

 ous and transversely folded; mouth formed 

 for manducation, furnished with mandibles, 

 maxillae, and palpi, both labial and maxil- 

 lary; metamorphosis complete (fig. 371). 

 BIBL. Newport, Todd's Cycl. Anat. and 



