EXTERNAL ANATOMY OF INSECTS. 367 
which lies between the Head and the Abdomen*. It in- 
cludes the Manitruncus, and the Alitruncus®. 
i. Manrtruncus (the Manitrunk), The anterior seg- 
ment of the trunk, in which the head inosculates, 
or on which it turns‘. It includes the Prothorax 
and Antepectus. 
1. ProtHorax (the Prothorax). ‘The upper part or 
the shield of the manitrunk, in Coleoptera, Ortho- 
ptera, &c. called by way of eminence the Tho- 
rax*. It includes the Ora, Patagia, Umbones, and 
Phragma. 
A. Ora (the Ora). The inflexed or inferior lateral mar- 
gin of the Prothorax, separated in many genera 
from the Antepectus by a suture ®. 
B. Paraeia (the Patagia). 'Two corneous scales ob- 
servable in Lepidoptera, fixed on each side of the 
trunk, just behind the head, and covered with a 
long tuft of hair’. 
C. Umponess (the Bosses). "Two moveable bosses sur- 
mounted by a spine, with which the Prothorax of 
the Coleopterous genus Acrocinus is armed. 
D. Puraema (the Phragm). The Septum that closes 
the posterior orifice of the Prothorax in Gryllotalpa 
Latr. 
2. ANTEPEcTUS (the Forebreast). The underside or 
breastplate of the manitrunk, and the bed of the 
a Prate IX. Fic. 7, 10, 11, &c. and XVI. Fic. 4, 8. B. 
> M. Chabrier, in his admirable Mémoires sur le Vol des Insectes, 
uses the term T'rone Alifére, which suggested the terms here em. 
ployed. : 
* Prate IX. Fie. 38, 12, 16, &e. 4 [bid. Fre. 1, 2,.10, 11, &c. 
e Ibid. Fie. 2. al. ® Thid. Fre. 4. 
