400 ON THE ORDERS 



place. Tims, M. Latreille, in describing the genus Phyl- 

 losoma, which was one of the results of the unfortunate 

 Congo expedition, expresses himself in the following words : 

 " On a donne a une Squille de la Mediterranee, genre de 

 la memefamille que la precedente, le nom de Mante, par- 

 ceque ce crustace a quant, a la forme de ses serres des rap- 

 ports avec les Orthopteres qui ont recu cette dernier e de- 

 nomination. II semble que la Nature ait voulu, a Vegard 

 des Phyllosomes, etendre ce parallele, et reproduire le type 

 de forme quelle a adoptee pour d'autres Orthopteres ranges 

 avec les Mantes par Linnceus, et qui composeut aujourd'hui 

 le genre Phyllie." 



Turning also to the other side of the insects furnished 

 with mandibles, we may distinguish those relations of ana- 

 logy, which have an existence between the corresponding 

 ganglions of Mandibulata and Ametabola, to be still visi- 

 ble between these last and the corresponding groups of 

 Haustellata. Thus says Degeer, in describing the larvae 

 of the Latreillian genera Erycina and Polyommatus, 

 " Celles sont les Chenilles-Cloportes, ainsi nominees parce- 

 qiCelles ressemblent en quelque maniere aux Cloportes, 

 ay ant le corps tres applati, mais large, et portant ordinaire- 

 ment la tete cachee sous le premier anneau du corps: elles 

 marchent aussi tres lentement en glissant pour ainsi dire 

 sur le plan de position." And if Lepidopterous larvae 

 sometimes thus imitate the more eccentric forms of the 

 corresponding order of Chilognatha, every one knows that 

 their ordinary shape is that of an Iidus. Nay, the rule 

 of analogy between corresponding groups is so strictly ob- 

 served, that we may even trace vestiges of it all the way 

 from the Lepidoptera to the analogous point of the Crus- 

 tacea, although they become at last very vague. No 



