EXTERNAL ANATOMY OF INSECTS. 83 



The insertion is almost invariably concealed. Savigny has 

 called it also support. Kirby, if I understand him rightly, has 

 denominated it the car do, or hinge y The disk and feeler- 

 bearer are commonly two pieces running nearly parallel with 

 each other ; the former occupying the front, the latter the back 

 of the jaws. It has unfortunately happened, that Straus- 

 DUrckheim has selected for his dissections an insect, in which 

 the situation and proportions of these two parts are very 

 unusual, whence, in different formations, his names appear 

 rather defective. The palpifer bears on its back the 

 maxipalpus, or maxillary feeler. The fourth part is the 

 lacinia, or blade. It is called by Savigny, lame; by Straus- 

 Diirckheim, intermaxillaire ; by Latreille, internal lobe; by 

 MacLeay, lacinia. It is certainly the lacinia of Fabricius, 

 as applied to a butterfly. United to the back of the blade, is 

 the galea or lobe, a part exceedingly variable ; sometimes 

 bearing the appearance of a true feeler, and sometimes being 

 wholly obsolete. It has been called, in the Carabites, the 

 internal feeler; in the Scarabceites, the outer lobe of the 

 feeler-jaw. z The name galea was given to it by Fabricius. 

 This writer also treated of it as an inner maocipalpus. In 

 Lepidoptera, the insertion of the feeler-jaws offers nothing 



s'articule avec la quatrieme, que j'appelle la piece Palpifere. L' Intermaxillaire 

 occupe comme nous venons de le dire la face inferieure de la machoire, et forme 

 en meme temps son bord interne : elle se prolonge peu au-deld de la piece 

 dorsale, et forme en dessous une large plaque allongee, qui s'etend vers le milieu 

 de son bord interne en une longue apophyse dentiforme, dirig^e obliquement en 

 avant et en dedans. L'intermaxillaire s'articule en dehors avec la dorsale ; a 

 cote 1 de son apophyse, avec Tangle interne de la piece palpifere; a son bord 

 interne elle est liee par un espece membraneux avec la galea ; enfin, son bord 

 posterieur se continue avec le pharynx. La piece Palpifere occupe la face sup<±- 

 rieure de la machoire, et se trouve contigue a la mandibule. C'est une grande 

 plaque, a peu pres triangulaire, articulee par son bord externe avec la piece 

 dorsale ; par PanteYieur avec la galea ; par Tangle interne avec l'intermaxillaire; 

 et enfin son bord posterieur se continue avec le pharynx. Cette piece forme 

 ainsi avec la dorsale et l'intermaxillaire une chambre ouverte, d'une part, du cote" 

 de la branche transverse, par oil elle communique avec la cavite de la tete, et, 

 d'une autre, avec le galea. Sur Tangle antero-externe de cette piece est arti- 

 culele palpe, qui forme le principal appendice de la machoire. — Straus- Durckheim. 



y At their base they articulate with a piece more or less triangular, which I 

 call the hinge (cardo.) This, on its inner side, is often elongated towards the 

 interior of the base of the labium, to which it is probably attached. This elongate 

 process of the hinge in Apis, Bombus, &c, appears a separate articulation : and 

 the two together form an angle upon which the mentum sits, and by this the 

 maxilla: acts upon the labial apparatus. — Kirby. 



1 C'est uner rosse piece mobile qui termine la machoire.' — Straus-Diirckheim. 



