20 MODERN CLASSIFICATION OF INSECTS. 



enveloped in a case that it can employ neither. The resemblance 

 to the perfect state is very considerable, excepting in total want of 

 motion. Hymenoptera, Coleoptera. 



Isomorpha, in which all the stages are active and voracious, and 

 of similar form. Orthoptera, Hemiptera. 



Anisomorpha, in which appear the Amorphous, Necromorphous, 

 and Isomorphous characters, together with a typical and distinct 

 character. Neuroptera.* 



It will be at once perceived, that these two systems are virtually 

 almost identical. Mr. Newman's divisions of the Amorphous Ader- 

 mata and Dermata are also identical with Lamarck's groups, 

 Chrysalis signata and Chrysalis dolioloides, and the varied character 

 of the Neuroptera is indicated by MacLeay. (Hoi'o; Ent. and Linn. 

 Trans, xiv. p. 68.) 



Besides the five variations of metamorphosis constituting the 

 diagnostics of Lamarck's five groups or sub-groups mentioned above, 

 there are others of minor importance, which ought not to be omitted 

 in a system established exclusively on Metamorphosis; thus some of 

 the aquatic pupae of the Adermatous Diptera are locomotive, whilst 

 some of the Dermatous Diptera are nourished within the bodies of the 

 parent, the Hippoboscidae not being excluded from them until their 

 arrival at the pupa state. Again, the Phryganeidae, Libellulidae, 

 Ephemeridae, Chalcididae, RaphidiidiB, Coccidee , and Aleyrodes, 

 respectively offer various striking modifications in the nature of 

 their metamorphoses ; whilst in the pupa of Quedius tristis. Water- 

 house, and some othei Staphylinideous larva?, the limbs are soldered 

 as completely to the body as they are in the pupte of the Lepidoptera. 

 Hence I consider that the nature of the metamorphoses, if alone 

 relied upon, will not afford a sufficient mode of classification. 



We will, therefore, next proceed to notice the Alary System, or that 



* In the Essay published by tlie same author, under the name of " Sphinx ve.spi- 

 formis," this order is formed into a central circle, around which are arranged the 

 six preceding orders, forming as many circles. The distribution of the English 

 groups have been arranged by the same author in his Grammar of Entomology, and 

 in a memoir inserted in the second volume of the Entomohx,ical Magazine, upon the 

 same system ; of which Dr. Burmeister has remarked — " Die Eigenthumliclikeit 

 dieses neuen Systemes is voUkommen bezeichnet, wenn wir ein alibekanntes Urtlieil 

 darauf anwenden, indem « das Gute desselben nicht neu und das ncue nicht gut ' 

 genannt werden kann." Weigm.'Arch. V. 1. No. 4. 



f Trans. Eiit. Soc. No. 1 . pi. iii. f. 2. i. 



