CLASS INSECTA. ^7 



galea) ; the lower wings folded in two directions, or simply 

 in their length, and the cases usually coriaceous, and most 

 frequently crossed at their internal edge : they undergo 

 merely a semi-metamorphosis. 



The seventh order, the Hemtptera, has six feet ; four 

 wings, of which the upper two are in the form of crusta- 

 ceous cases, with the extremity membranous, or similar to 

 the lower, but larger and stronger : the mandibles and 

 jaws are replaced by hairs, forming a sucker, enclosed in a 

 sheath of a single piece, articulated, cylindrical or conical, 

 and formed like a beak. 



The eighth order, the Neuroptera, has six feet ; four 

 membranous and naked wings ; mandibles and jaws for 

 mastication ; their wings are finely reticulated, and the 

 lower are usually of the size of the upper, or more extended 

 in one of their diameters. 



The ninth order, the Hymenoptera, has six feet ; four 

 membranous and naked wings ; mandibles and jaws for 

 mastication ; the lower wings smaller than the upper ; the 

 abdomen of the females almost always terminated by an 

 auger, or a sting. 



The tenth order, the Lepidoptera, has six feet*, four 

 membranous wings, covered with small coloured scales, re- 

 sembling dust or powder. A corneous piece like an epau- 

 lette thrown backwards^ inserted in front of each upper 

 wing; the jaws replaced by two tubular threads, united and 

 composing a kind of spiral tongue.* 



The eleventh order, the Rhipiptera, has six feet; two 



• Spiritrompe. — See the generalities of the class. The thorax of the 

 lepidoptera has more analogy with that of the heiiroptera than with that 

 of the hymenoptera, the segment which I have named medial appearing 

 to constitute part of the abdomen, while in those last, and the diptera, 

 it is incorporated with the tliorax. 



