ANNULOSA JAVANICA. 7 



Linnaeus placed in his genus Silpha, to which, without doubt, Elophor us approaches by some of the 

 less typical insects of thatgroupe, which M. Latreille, in the Genera Insectbrum, has named Ne- 

 crophaga. From the Necrophaga we pass by means of Micropeplus to Staphylinus* and then 

 Lesleva (the Carabus staphylinoides of the Entomologia Britannica) will serve to conduct us back 

 again to the Terrestrial Adephaga. 



I now proceed to the consideration of that normal groupe of the Chilopodomorpha, which 

 is the same with the 



COLEOPTERA ADEPHAGA of Clairville and Latreille. 

 Character Essentialis. 



Maxillae loho interno unguiculato, ungue interdum articulo inserto ; loho externa palpiformi 

 scepissime biarticulato, qua de causa sex palpos apud Adephaga quidam enumerant. 



The Adephaga of Clairville compose one of those dichotomous groupes which M. Fries 

 would term a centrum. They are remarkable for having been characterized as possessing four 

 maxillary palpi, two to each maxilla. This excellent characteristic may, however, as above 

 explained, be more accurately understood by accounting all Coleoptera as having only two 

 maxillary palpi, and the Adephaga to be only peculiar in having a Particulate process to the 

 maxilla, which in some species is degraded to a mere spine. The typical structure of the 

 maxilla in adephagous insects seems to be that of the Cicindelidce, where this organ has both 

 the external and internal lobe Particulate. In all the other Chilopodomorpha the external joint 

 of the internal lobe, when it exists, is as in Cicindela, unguiform, but confluent with or soldered 

 to the first joint. 



These predaceous insects evidently form two very natural groupes, viz. the Terrestrial and 

 Aquatic Adephaga, the former of which is much more numerous in species than the second. 



A. GEODEPHAGA. 



Adephaga Tkrrestria, Lat. Carabus et Cicindela, Lin. Pedes tantummodo gressorii. 

 Corpus oblongum raro ovatum. Pedes postici motu horizontali et verticali ; lami?ice pectorales 

 quibus inseruntur magnitudine mediocres. 



B. HYDRADEPHAGA. 



Adephaga Aquatica, Lat. Dyticus el Gyrinus, Lin. Pedes natatorii. Corpus ovatum. 

 Pedes postici motu tantum horizontali ; lamina pectorales quibus inseruntur maximce. 



If the five following families of terrestrial Adephaga, which coincide with those of MM. Latreille 

 and Dejean, be natural, then the subdivision of them will probably depend on the form of the 

 mentum, which deserves particular attention. But although I believe the following table to be 

 a very near approximation to the truth, I am inclined to think that the accurate demarcation of 

 the respective families depends on the forms of the larvae. Thus, the Cicindelidce and Carabidce 

 are distinguished from all the other terrestrial Adephaga, in having the styliform appendages to 

 the body of their larvae corneous ; but the Cicindelidce have them dorsal and affixed to the eighth 

 segment of their body, in order to suit their mode of life ; whereas, the Carabidce have them 



caudal. 



* " Sous quelques rapports les Brachelytres avoisinent les Adephages et sous plusieurs autres les Boucliers et 

 les Necrophores." — Lat. Regne Animal, vol. iii. p. 216. 



