EXTERNAL ANATOMY OF INSECTS. 367 



1. Lora (the Lor a). A corneous angular machine ob- 



servable in the mouth of some insects, upon the in- 

 termediate angle of which the Mentum sits, and on 

 the lateral ones the Cardines of the Maxilla • and 

 by means of which the Tropin are pushed forth or 

 retracted a . — Ex. Hymenoptera. 



2. Jugulum (the Throat). That part of the subface 



that lies between the temples b . 



iv. Collum (the Neck). The constricted posterior part 

 of a pedunculate head, by which it inosculates in 

 the trunk c . It includes the Nucha, Gula, and 

 Myoglyph ides. 



1. Nucha (the Naj)e). The upper part of the neck d . 



It includes the Myoglyphidcs. 

 A Myoglyphides (the Muscle- notches). Notches in the 

 posterior margin of the neck, usually two in num- 

 ber, observable in Coleopterous insects, to which the 

 levator muscles are attached e . 



2. Gula (the Gula). The lower part of the neck f . 



v. Cephalophragma (the Cephalophragm). A Y-shaped 

 partition that divides the head internally in Locust a 

 Leach, into two chambers, an anterior and posterior. 



II. TRUNCUS (The Trunk). 



The Trunk is the intermediate section of the body, 

 which lies between the Head and the Abdomen s . It in- 

 cludes the ManitruncuS) and the Alitruncus b . 



a Plate VII. Fig. 2. 1. Mon. Ap. Avgl. i. t. xiii./. V. a, e. 



b Plate VI. Fig. 3. m. ' ; Ibid. i. d Ibid. n. 



£ Plate XXVII. Fig, 1 , 3, 4. n'. f Plate VI. Fig. 2. o. 



« Plate IX. Fig. 7, 10, 1 1, &c. and XVI. Fig. 4, 8. B. 



*> M. Chabrier, in his admirable Memoires sitr le Vol des Insectes, 



