EXTERNAL ANATOMY OF INSECTS. 369 



brane that connects the Antepectus with the Medi- 



pectus a . 

 B Prosternum (the Forebreast-bone). A longitudinal 



or other elevation of the Antepectus between the 



Brachia b . 

 C Antefurca (the Antefurca). An internal vertical 



process of the Antepectus, consisting usually of two 



branches, which afford a point of attachment to 



muscles of the Brachia c . 

 D Brachia (the Arms). The first pair of legs of Hex- 



apods, the direction of which is usually towards the 



head ; when spoken of with the other legs, called 



the Forelegs d . They include the Clavicula, Scapida, 



Humerus, Cubitus, and Manus. 

 a Clavjctjxa: (the Clavicle). Thejirst joint of the Bra- 



chium, answering to the Coxa in the legs. 

 b Scapula (the Scapula). The second ]6mt of the Bra- 



chium, answering to the Trochanter in the legs. 

 c Humerus (the Humerus). The third and elongated 



joint of the Brackium, answering to the Femur in 



the legs. 

 d Cubitus (the Cubitus). The fourth and elongated 



joint, answering to the Tibia in the legs. It includes 



the Coronula and Calcaria. 

 A Coronula (the Coronula). A coronet or semicoro- 



net of spines, observable at the apex of the Cubitus 



* Plate XXIX. Fig. 12. c. b Plate VIII. Fig. 2, 11. d'. 



c Plate XXII. Fig. 7- e. 



d M. Latreille, in his Organisation Exterieure des Insectes {Mem. 

 du Mus. viii. 198.) proposes calling the fore-legs of Hexapods Pro- 

 pedes; but having long ago applied this term to the false legs of ca- 

 terpillars (see above, Vol. II. p. 288. &c), we shall not adopt it. 



VOL. III. 2 B 



