INTRODUCTORY REMARKS. ^ 6^ 



of the labium (or tongue) a little below their apex. 

 Now this is a circumstance that takes place, not 

 only never in these families, but likewise not in any 

 one of the five genera into which he has divided 

 jt4pis. For where the palpi emerge from the 

 exterior lacini^, as tliey most commonly do in 

 ^pis, but never in Melitta, two is the most natural 

 number of their articulations (c), but in the subdi- 

 vision to which HyLnis Jlorlsomnis and its affinities 

 belong, they are exarticulate(^). In Melitta they 

 invariably consist of four joints, but in that genus 

 they spring from the tongue itself, a little above 

 the apex of the tube {e). The mandihulce or max- 

 ilLty are inermes or edentula, only in one sex of 

 these families of Melitta (f) ; but, in the Apes in 

 question, they are bidentate at the apex in all the 

 sexes (»•). The maxilla or valvula are corneous 

 only at their base, their tops are coriaceous ; they 

 can scarcely be denominated " breves" in any of 

 these families (A), and in two of them they are 

 acute instead of being rounded at the apex(/)i 

 The characters he has assigned to the labium or 

 lingua will not entirely agree with it in any one of 

 them. In the ylpes in question it is elongate^ 



(c) Tab. 6. **. b. fig. 3. h. Tab. 12. **. e. 1. ;neut. fig. 4. 



{d) Tab, p. **. c> 2. 7. fig. 3. dd. and fig. 5. h. 



(0 Tab. 1. *. b. fig. 1. ee. (/) Ibid. fig. 5, Q, 7. Tab. 3. 

 i?*.b. fig. 3,4. (g) Tab.p. **. c. 2. r. fi.g. 6. (A) Tab. 

 1. *, b. fig. 2. Tab.3. *■*. b. fig. 2. Tab.p. ubi suprafig. 3. a. 



(i) Viz. Tab. 1. *. b. and Tab. Q ubi supra. 



inflected 



* 



