134 



the mouth, and was soon convinced that the parts of it wer^ 

 far from being obsolete ; but fearing to undertake the dis- 

 section, I submitted the specimen to the inspection of S^- 

 vigny, from whose exact and ahnost infalhble hand and 

 eye, 1 felt confident of gaining the desired information, 

 the result of which shall now be given. — He observed, that 

 the moutli contains the whole of tlic usual parts which, 

 under various modifications, exist in all insects * the man- 

 dibles are perfectly distinct from and unconnected with th^ 

 maxilke ; the maxilke are inserted behind and somewhat 

 below the mandibles, whose base they conceal ; and the 

 articulation of the labrum is very evident, from its semi- 

 transparency. 



RIIIPIIIPTERA. 



Strepsiptera. Kirbi/, Leach. 



Rhipiptera. Latreil/e. 



DiPTERA RiiiPiDOPTERA. Lamarck. 



Character Ordinis. 



Os labro, mandibulis maxillis et labio instructum^ 



Antennce bipartitas. 



Thorax utrinque antice ad pedum anticorum basin pro* 



cessu mobili instructus. 

 Alee duse membranaceae longitudinaliter plicatiles ; pterin 



gostiis radiantibus. 

 Larva in Hymenopterorum abdomine latet parasitica. 

 Pupa coarctata inter abdominis segmenta affixa. 



I have seen but one genus of this order, viz. Stylops, of 

 whicii the following is the character. 



