26 INTRODUCTORY REMARKS. 



inferne includentes (r). To this if we add what he 

 says elsewhere, " Palpi antici maxillce dorso adnad,'* 

 it will appear that his maxilliu are what I have 

 termed valvule in the following work (s), and are 

 also equivalent to the valvce of the lower vagina 

 of the Linnean character of Jpis. In Hymenopte- 

 Tous insects these are longitudinal instead of trans- 

 verse, and the term maxilla (jaw-bone) applied to 

 a membrane is not a little absurd. In his Na- 

 tural Characters of some genera in this class, Fa- 

 bricius calls this part, with respect to the whole 

 proboscis, " linguae lamina exterior, or lacinia 

 exterior (t). 



PALPI ANTERIORES, sometimes called 

 antici : these answer to my palpi exteriores (m), 

 they emerge laterally from the maxilla or valvula. 



PALPI POSTERIORES, sometimes denomi- 

 nated postici : they are equivalent to my palpi 

 interiores {x), and sometimes arise from the tongue 

 just above the top of the tube (?/), and at others 

 just below the apex of the exterior lacinice (z). I 

 have altered both these terms in conformity to the 

 opinion of Professor Afzelius (a), upon whose 

 accuracy the greatest reliance may be placed ; and 

 indeed the epithets exterior and interior are much 

 more applicable to them, than anterior znA posterior. 



(r) Philos.Ent. c. ii. § 3. {s) Tab. 11.**. d. 2. «. fig. 1. cc. 



{t) E. G. Sphex, Bemlex, &c. Andrena, Jpis, &c. 



(m) Tab. 11, ubi supra hh. {x) Ibid. ii. 



(y) Tab. 1. *. a fig. 3. hh. (z) Tab. 11. ubi supra. 



(c) Afzelius in Lin. Trans, vol. 4. p. 250. 



MANDIBULA. 



