.^ IxVIRODUCTORY REMARKS. 



plcarly, but an accurate delineation of each part, 

 and its natural situation, should have been made 

 and referred to. 



The parts from v/hich Fabricius has taken his 

 characters of this class and its genera, that seem to 

 require explanation, are lingua, labium, maxilla, 

 palpi anteriores, palpi posteriores, mandihula, 

 clypeus. 



LINGUA. Fabricius defines this part " Lin- 

 gua spiralis inter palpjos reflcxos latens convoluta{d) ." 

 And at the end of his chapter on the Iiistrumenta 

 ciharia {e),, he says " Maxillae, lahiumque elongata, 

 membraiiacea, inter mandihulas injlexa, linguam 

 constituuni." But this latter definition, from a 

 subsequent observation, seems intended solely to 

 denote what he means by lingua in v^pis, and the 

 genera he has separated from it, &c. and the former 

 to apply chiefly to the tongue of the Lepidopiera. 

 From hence it appears that the term lingua, in this 

 class, is equivalent to the Linnean term proboscis ; 

 .including the whole machinery of that organ (y). 

 It seems to me that this term ought to be applied 

 exclusively to the instrument which acts the part 

 of a tongue. 



LABIUM. The definition is " Labia os in- 

 ferne daudentia, ne hausta eruant{g). This term 



(f/) Philos. Ent. c. ii. § 3. In another place he defines it 

 " Lingua spiralis amvoliita bifida, inter palpos stuposos inserta," 

 manifestly referring to the Lepidoptcra, Ibicl. c. iii. § 1. 



(e) Ibid. § 18. (/) Tab. 11. * *. d. 2. a. fig. 1. 



(j§) Philos. Ent. c. ii. § 3, 



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