OIF MANDIBULATA. 437 



ptera and Coleoptera the reader will perceive by referring 

 to its place in the Sy&tema datura. The Dermaptera, 

 for so they are termed from its having been the name ori- 

 ginally proposed for the Orthoptera by Degeer, are in 

 fact Coleopterous insects, with the metamorphosis and 

 caudal appendages of true Orthoptera. 



In the course of these various details 1 have taken little 

 notice of the relations of analogy which may exist between 

 the corresponding groups of adjoining circles. Indeed, 

 my confidence in the accuracy of the foregoing tribes has 

 not been great enough to induce me to give much time to 

 this part of the subject, although relations of analogy are 

 visible even from the simple position of the different groups 

 in their series of affinity. I shall therefore content myself 

 with laying this position of the series before the reader, 

 to whom the investigation of such analogies may perhaps 

 afford some amusement. In the present as well as in the 

 similar table before given the order of affinity is repre- 

 sented vertical, and the order of analogy horizontal. 



t. ii. in. iv. v. 



Orthoptera. Coxeoptfra. Hymenoptera. Trichoptera. Neuroptera. 



l.Pbasmina Larvae Vertniformes Tubulifera Perlina Corydalina 



2. Acridina L. Cbilognaihiformes Anthophila Phrvganina Myrmeleonina 



3. Locustina L. Chilopodiformes Rapacia * * # Libel lulina 



4. Grvllina L. Thysanuriformes Pupivora Tentbredina Panorpina 



5. Blattina L. Anopluriformes Heterogyna * * * Termitina. 



If a diagram of these analogies be constructed on the 

 plan of that given in the preceding chapter, the reader 

 will perceive the same general order and the same appa- 

 rent anomalies. But if we only recollect that the two ex- 

 treme columns have their analogies inverted, the bare 

 inspection of this table is sufficient for my purpose, which 

 is to call attention to the vermiform appearance of the 

 larvae of a Phasma, Ttaphidia, Tenthredo, and Ichneumon, 



