EXTERNAL ANATOMY OF INSECTS. 44*1 



of the base of the labium, to which it is, as I have just 

 observed, probably attached. This elongate process of 

 the hinge in Apis, Bombus, &c. appears a separate arti- 

 culation ; and the two together form an angle upon which 

 the mentum sits a , and by this the maxilla acts upon the 

 labial apparatus. 



The next piece is the stipes or stalk of the maxilla. 

 This is the part that articulates with the hinge, and may 

 be regarded in some cases, as in the Orthoptera &c, as 

 the whole of the maxilla below the feeler; and in others, 

 as in the Geotrupidce, Staphylinidce &c, as only the back 

 of it, the inside forming the lower lobe. This piece is 

 often harder and more corneous than the terminal part, 

 is linear, often longitudinally angular, and in the bee- 

 tribes [Apis L.) is remarkable on its inner side for a se- 

 ries of bristles parallel to each other like the teeth of a 

 comb b . In Pogonophorus Latr., a kind of dor or clock- 

 beetle, it is armed on the back with four jointed spines, 

 the intermediate one being forked c . M. Latreille has 

 thus described the stipes of the maxilla of Coleoptera : 

 " Next comes the stalk," says he, " which consists of 

 three parts : one occupies the back and bears the feeler ; 

 the second forms the middle of the anterior face, and its 

 figure is triangular; the third fills the posterior space 

 comprised between the two preceding ; and is that which 

 is of most consequence in the use of the maxilla; the an- 

 terior feeler, where there are two, the galea, and the 

 other appendages that are of service in deglutition, are 

 part of that piece d ." 



a Plate VII. Fig. 3. a", e". Mon. Ap. Angl. i. t. xiii./. 1. <?. 



b Ibid.f. 3. a. c Clairv. Ent. Helvet. ii. 146. t. xxiii./. super, b. 



A N. Diet. d'Hist. Nat. iv. 243. 



